I n t e r n at ion al  Jou r n al   of   E lec t r ical  an d   Com p u t e r   E n gin e e r in ( I JE CE )   Vol.   15 ,   No.   1 F e br ua r y   20 25 ,   pp.   280 ~ 291   I S S N:  2088 - 8708 ,   DO I 10 . 11591/i jec e . v 15 i 1 . pp 2 80 - 291             280       Jou r n al  h omepage ht tp: // ij e c e . iaes c or e . c om   Op t imal   c le a n in g   r ob ot   on   sol ar   p a n e ls   w it h   t ime - se q u e n c e   in p u t   b as e d   on   in t e r n e t   of   t h i n gs       Dwi   Nur   F i t r iyan ah 1 ,2 ,   Rival d i   Dwi   P r am an a   S a p u t r a 1 ,   I m a m   Abad i 2 ,   Ali   M u s yaf a 2   1 D e pa r tm e nt   of   I ns tr ume nt a ti on   E ngi ne e r in g,   F a c ul ty   of   V oc a ti ona l   S tu di e s ,   I ns ti tu t   T e knol ogi   S e pul uh   N ope mbe r ,   S ur a ba ya ,   I ndone s ia     2 D e pa r tm e nt   of   E ngi ne e r in g   P hys ic s ,   F a c ul ty   of   I ndus tr ia l   T e c h nol ogy   a nd   S ys te m   E ngi ne e r in g,   I ns ti tu t   T e knol ogi   S e pul uh   N ope mbe r ,   S ur a ba ya ,   I ndone s ia       Ar t icle   I n f o     AB S T RA CT   A r ti c le   h is tor y :   R e c e ived   M a 14,   2024   R e vis e d   S e 9,   2024   Ac c e pted   Oc 1,   2024       So l ar   p a n el s   are   t h e   mai n   c o mp o n e n t   of   s o l ar   p o w er   g en erat i o n   s y s t ems ,   an d   t h e y   fu n c t i o n   by   c o n v ert i n g   s o l ar   e n erg y   i n t o   el ec t ri c al   en er g y .   In d o n es i a   h as   g r eat   p o t e n t i a l   fo r   s o l ar   e n erg y .   So l ar   p a n el s   w i l l   w o r k   o p t i mal l y   at   t emp era t u re s   of   25   ° C   to  28   ° C.   The   g reat er   the   t emp erat u re   of   the   s o l ar   p an e l ,   the   m o re   p o w er   g en era t ed   by   the   p an e l .   T h e   i n fl u en ce   of   s o l ar   rad i a t i o n   i n t en s i t y   ca n   be   ca u s e d   by   d u s t   a n d   a n i ma l   d ro p p i n g s   at t ach e d   to   the   s u rface   of   t h e   s o l ar   p an e l   mo d u l e.   If   the   s u rface   of   a   s o l ar   p an e l   is   co v ere d   w i t h   d u s t   or   d i r t ,   w h i ch   ca n   b l o c k   t h e   en t r y   of   s o l ar   ra d i a t i o n ,   t h e   res u l t i n g   p o w er   o u t p u t   is   n o t   o p t i mal .   The   a i m   of   t h i s   res earch   is   to   d e s i g n   an d   i m p l eme n t   an   au t o ma t i c   c l ean i n g   s y s t em   fo r   s o l a r   p o w er   p l an t s .   T h e   s y s t em   u s ed   is   u s i n g   E SP3 2   b a s ed   on   t h e   Bl y n k   ap p l i cat i o n   an d   a d d i n g   i n t ern e t   of   t h i n g s   (Io T )   d ev i ces   w i t h   a   cl ea n i n g   me t h o d   u s i n g   p u m p ed   w at er   s p ra y i n g ,   t h en   a s s i s t e d   w i t h   w i p er s   w h i c h   h av e   s i l i c o n   ru b b er   mat er i al   to   cl ean   d u s t   an d   d i rt .   Bas ed   on   the   cl ea n i n g   o p t i mi zat i o n   s i m u l a t i o n   cal cu l at i o n s ,   we   fo u n d   t h a t   the   o p t i mal   or   effi ci e n t   cl e an i n g   co n d i t i o n   w a s   o n ce   a   mo n t h ,   w i t h   an   eff i ci e n cy   of   7 5 . 1 7 % .   K e y w o r d s :   C lea ning   s ys tem   E lec tr ica l   e ne r gy   I nter ne t   of   thi ngs   S olar   e ne r gy   S olar   pa ne l   Th i s   is   an   o p en   a c ces s   a r t i c l e   u n d e r   the   CC   BY - SA   l i ce n s e.     C or r e s pon din g   A u th or :   I mam   Aba di   De pa r tm e nt   of   E nginee r ing   P hys ics ,   F a c ult y   of   I nd us tr ial   T e c hnology   a nd   S ys tem   E nginee r ing I ns ti t ut   T e knologi   S e puluh   Nope mber   B uil ding  of   I T S   Ke puti h   C a mpus ,   S ukoli lo ,   S u r a ba ya ,   I ndone s ia   E mail:   im a maba di02@gm a il . c om       1.   I NT RODU C T I ON   E ne r gy   ha s   be c ome   an   e s s e nti a l   ne e d   in   s oc iety   as   a   li f e   s uppor t   c omponent   to   s uppor t   da il y   a c ti vit ies .   T he   ge ne r a l   e lec tr ica l   e ne r gy   in   I ndon e s ia   c omes   f r om   f os s il s ;   the   bu r ning   of   thes e   can   c a us e   global   wa r mi ng.   I ndone s ia   ha s   a   r e ne wa ble   e ne r gy   potential   of   mor e   than   400 , 000   M W ,   50 %   of   whic h   is   s olar   e ne r gy.   H o w e ve r ,   t he   M in is t r y   of   E n e r g y   a n d   M in e r a l   R e s ou r c e s   ( E S DM )   s ta te d   tha t   th e   us e   of   th is   e ne r g y   s ou r c e   is   on ly   0 . 0 8 %   or   15 0   MW   of   t he   e x is t i ng   po te nt ia l   [ 1 ] ,   [ 2] .   T he   us e   of   s olar   e ne r gy   f r om   the   s un   via   s olar   pa ne ls   is   an   a lt e r na ti ve   to   the   us e   of   e le c tr ica l   e ne r gy   s our c e d   f r o m   f os s il   f ue ls .   E lec tr ica l   e ne r gy   f r om   the   s un   ha s   low   ope r a ti ona l   c os ts   of   1   USD   pe r   wa tt   a nd   gua r a ntee s   the   a va il a bil it y   of   e ne r gy   s our c e s .   T he   us e   of   s olar   e ne r gy   f or   e lec tr icity   ge ne r a ti on   is   e s ti mate d   to   incr e a s e   by   18 %   f r om   2013   to   2050   [ 3] .   S olar   pa ne ls   a r e   the   p r im a r y   e quipm e nt   in   s olar   powe r   ge ne r a ti on   s ys tems ,   a nd   they   f unc ti on   by   c onve r ti ng   s olar   e ne r gy   in to   e lec tr ica l   e ne r gy   [ 4 ] .   I ndone s ia   ha s   gr e a t   po tential   f o r   s olar   e ne r gy   d ue   to   its   e qua tor   pos it ion   a nd   tr opica l   c li mate ,   r e s ult ing   in   a   s igni f ica nt   s olar   e ne r gy   potential   of   a ppr o xim a tely     4. 8   kW h/day   [ 5 ] ,   [ 6 ] .   How e ve r ,   the   output   powe r   ge ne r a ted   f r om   th is   c onve r s ion   p r oc e s s   is   inf lu e nc e d   by   va r ious   e nvir onmenta l   c ondit ions ,   s uc h   as   s olar   r a diation   int e ns it y   a nd   tempe r a tu r e   [ 7 ] ,   [ 8] .   Evaluation Warning : The document was created with Spire.PDF for Python.
I nt  J   E lec   C omp   E ng     I S S N:   2088 - 8708       Optimal  c leaning  r obot  on   s olar   pane ls   w it ti me - s e que nc e   input   bas e on  int e r ne   ( Dw N ur   F it r i y anah )   281   High   tempe r a tur e s   can   limit   the   e ne r gy   pr oduc ti on   of   s olar   pa ne ls   be c a us e   the   in tens it y   of   s olar   r a diation   incr e a s e s   f r om   mor ning   unti l   noon.   S olar   pa ne ls   wor k   opti mally   at   tempe r a tur e s   be twe e n   25   °C   a nd   28   °C   [ 9] ,   [ 10] .   T he   lar ge r   the   tempe r a tur e   of   the   s olar   pa ne l,   the   mor e   im pa c t   wil l   be   on   the   powe r   g e ne r a ted   by   the   pa ne l.   T he   inf luenc e   of   s olar   r a diation   int e n s it y   can   be   a f f e c ted   by   dus t   a nd   a nim a l   dir t   a dhe r i ng   to   the   s ur f a c e   of   the   s olar   pa ne l   modul e   [ 11] ,   [ 12 ] .   F or   e xa mpl e ,   if   the   s ur f a c e   of   a   s olar   pa ne l   is   c ove r e d   with   dus t   or   di r t,   it   can   obs tr uc t   the   e nt r y   of   s olar   r a diation   int e ns it y,   ther e by   a f f e c ti ng   the   op ti mal   outpu t   po we r .   One   wa y   to   mi n im ize   high   tempe r a tur e s   a nd   r e move   d us t   a nd   a nim a l   d ir t   f r o m   s olar   pa ne ls   is   to   c lea n   a nd   s pr a y   wa ter   onto   the   s ur f a c e   of   the   s olar   pa ne l   modul e   [ 1 3] .   S olar   pa ne ls ,   as   a   tec hnology   f or   us ing   s olar   e ne r gy,   r e quir e   p r ope r   maintena nc e   to   maintain   their   pe r f or manc e .   S olar   pa ne l   c lea ne r s   a r e   a   s olut ion   f o r   e f f icie ntl y   a nd   s us taina bly   maintaining   pa ne l   c le a nli ne s s ,   thus   c ontr ibut ing   to   e nvir onmenta l   c ons e r va ti on.   T he   us e   of   s olar   e ne r gy   as   a   c lea n   a nd   s us taina ble   a lt e r na ti ve   e ne r gy   s our c e   is   incr e a s ing   [ 14] ,   [ 15 ] .   How e ve r ,   the   e f f icie nc y   of   s olar   pa ne ls   is   a f f e c ted   by   e nvir onmenta l   f a c tor s ,   s uc h   as   the   a c c umul a ti on   of   di r t   a nd   dus t.   T his   lea ds   to   a   de c r e a s e   in   the   e lec tr ica l   e ne r gy   pr oduc ti on .   T he r e f o r e ,   r e s e a r c h   int o   pa ne l   c lea ne r s   is   im por tant   f o r   maintaining   opti mal   s olar   pa ne l   pe r f or manc e   a nd   maximi z ing   s olar   e ne r gy   uti li z a ti on.   S olar   pa ne l   c lea ne r s   can   be   a   s olut ion   to   inc r e a s e   pa ne l   e f f icie nc y   a nd   e xtend   thei r   li f e s pa n,   thus   pr ovidi ng   be tt e r   r e tur n   on   inves tm e nt   [ 16 ] .   In   a   pr e vious   s tudy   [ 17]   ti tl e d   Automate d   d e s ign  f or   boos ti ng  of f s hor e   photovol taic   ( P V)   pe r f or manc e ,   a   s olar   pa ne l   c lea ning   r obot   wa s   de s igned   f or   of f s hor e   loca ti ons   us ing   br us he s   or   dus t   br us he s   to   c lea n   s ubs tanc e s   li ke   s a nd,   dir t,   a nd   bi r d   d r oppi ngs   f r om   the   s ur f a c e   of   the   s olar   pa ne l   modul e ,   w hich   can   s igni f ica ntl y   de c r e a s e   the   pe r f or manc e   of   the   s olar   pa ne l   modul e .   T he   PV   pe r f or manc e   de c r e a s e   is   due   to   the   f or mation   of   a   laye r   of   dus t   pa r ti c les   on   the   f r on t   s ur f a c e   of   the   s olar   pa ne l,   whic h   c a us e s   s ha ding   e f f e c ts   [ 15] .   One   dr a wba c k   of   thi s   tool   is   the   lac k   of   wa t e r   to   c lea n   the   s olar   pa ne l   s ur f a c e .   Additi ona ll y ,   it   us e s   a   pr ogr a mm a ble  logi c   c ontr oll e r   ( P L C )   c ontr oll e r ,   whic h   make s   the   s ys tem   les s   e f f icie nt   be c a us e   the   P L C   ne e ds   to   c onne c t   to   a   c ontr o ll e d   c omput e r   to   a c ti va te   the   s ys tem,   so   it   c a nnot   be   r e mot e ly   c ontr ol led.   B a s e d   on   s e v e r a l   objec ti ve s ,   thi s   r e s e a r c h   a im s   to   de s ign   a nd   im pleme nt   an   a utom a ti c   s olar   pa ne l   c lea ning   s ys tem   f or   s olar   powe r   plants .   T he   s ys tem   us e s   wa ter   s pr a ying,   whic h   is   pumped   thr ough   a   wipe r   e quipped   with   s il icon   r ubbe r   to   r e move   dus t   a nd   dir t.   T he   s ys tem   is   a c ti va ted   at   pr e de ter mi ne d   i nter va ls .   Additi ona ll y,   to   e ns ur e   tho r ough   c lea ning   of   the   s olar   pa ne ls ,   a   dir e c t   c ur r e nt   ( DC )   mot o r   is   e mpl oy e d   as   the   c lea ning   de vice 's   dr ive.   A   li mi t   s witch   is   us e d   as   a   wor k   li mi te r   in   the   c lea ning   s ys tem.   T h is   s olar   pa ne l   c lea ning   s ys tem   us e s   an   E S P 32   mi c r oc ontr oll e r   ba s e d   on   the   B lynk   a ppli c a ti on,   a ll owing   r e mot e   c ontr ol   thr ough   the   in ter ne t.   T he r e   a r e   two   c ontr ol   modes :   manua l   a nd   a utom a ti c .   In   the   a utom a ti c   mode ,   th e   s ys tem   r uns   a c c or ding   to   a   pr e de ter mi ne d   s c he dule,   na m e ly   onc e   a   mont h;   in   the   manua l   mode,   ther e   is   a   manua l   butt on   to   a c ti va te   the   s ys tem.       2.   M E T HO D     T he   f i r s t   s tage   be gins   wi th   a   li ter a tu r e   r e view   that   identif ies   r e f e r e nc e s   to   the   r e s e a r c h   to   be   c onduc ted.   T hus ,   a   s ys tem   c ons is ti ng   of   ha r dw a r e   a nd   s of twa r e   de s ign   c omponents   wa s   c r e a ted.   Af te r   de s igni ng   the   too l,   a   tool   c ons is ti ng   of   ha r dwa r e   a nd   s of twa r e .   Af ter   im p leme nti ng   the   tool ,   th e   B lynk  s of twa r e   wa s   int e gr a ted   int o   E S P 32.   Af ter   i mpl e m e nti ng   the   tool ,   the   B lynk   s of twa r e   wa s   r un   on   the   E S P 32.   T he   pr opos e d   too l   wa s   tes ted   f or   pe r f o r manc e   a f te r   int e gr a ti on .   If   the   s ys tem   wor ks   pr ope r ly,   da ta   c oll e c ti on   a nd   a na lys is   a r e   pe r f or med.   If   a   dis tur ba nc e   r e mai ns ,   an   e va luation   can   be   made   of   the   tool   manuf a c tur e .   T he   las t   s tep   is   the   pr e pa r a ti on   of   the   r e por t .   F ig ur e   s ho w s   t he   de s ig o f   a   r ob ot  c l e a n in a   s o l a r   p a n e l.   T h e   s o la r   p a n e u s e i t hi s   c l e a n in m e diu i s   of   th e   on   gr id   t yp e   wi th   a   c a pa c it y   o f   5 0 W p.   T h e   s ol a r   p a n e l s   w it a   mo no c r y s t a ll in e   c a p a c it o f   10 W a r e   p c s .   T h e r e   a r e   ty pe s   of   s ol a r   pa n e l s   u s e in  t hi s   s ol a r   p a ne l:   p c s   of   p ol yc r y s t a l li ne   a n 2   p c s   o f   m on oc r y s t a l li ne .   T h e   s o la r   s y s te w ir in wa s   c onf ig ur e in  s e r ie s   a nd  pa r a ll e a c c or d in to  th e   i np ut  vo lt a g e   r a n g e   of   th e   s e l e c t e gr i ti e   in ve r te r   2 2 - 50  vol t s   d ir e c c ur r e n ( VD C ) .   T he   c onne c t ion  to  a   s e r ies   of   s olar   pa ne l   modul e s   us e s   a M C c onn e c tor ,   whic h   c a be   us e in  ou tdoor   loca ti ons .   T he   s olar   pa ne modul e   is   mount e d   on  a   r a il   f r a me  made   of   s tainles s   s tee l,   4   r a il s   a r e   us e with   a   length  o f   3 , 500  mm   e a c h,   a nd  the  r a il s   a r e   s uppor ted  by   pe r mane nt  r e a r   a nd  f r ont  legs   on   a   c onc r e te  ba s e   with  a   tot a o f   e a c h.   T lock  the  s olar   pa ne modul e   to  the  r a il ,   e nd  c lamps   we r e   us e on  the  e nds   a nd  mi c lamp s   on  the  mi ddle  s ide,   e nd  c lamps   a nd  16   mi d   c lamps .   T his   tool   ha s   dim e ns ions   of   120 × 12 × c m .   T his   bo dy  c lea ning  s ys tem  in  F igur e   2   c ons is ts   of   s e ve r a c omponents   s uc a s   a   noz z le  that   f unc ti ons   to   pr ovide  wa ter   p r e s s ur e   to  be   s pr a ye on   the   s olar   pa ne l,   a   mot or   that   dr ives   the   body  c lea ning   s ys tem  hor izo ntally,   a   hos e   that  f unc ti ons   a s   a   wa ter   f low ,   d r ive   whe e ls   a tt a c he to  the  mot or   a nd  the  bot tom   of   the  body  c lea ning  s ys tem,   a nd  a   s uppor whe e to  s uppor t he   body  c lea ning  s ys tem.   At   the   bott om   o f   the  body   c lea ni ng  s ys tem,   ther e   is   a   r ubbe r   o r   plas ti c   wipe r   to   r e move   a ny   r e maining  wa ter   f r om   the  s ur f a c e   of   the  s olar   pa n e l.   W a ter   r e maining  on  the  s ur f a c e   of   the  s olar   p a ne c a c a us e   mol or   wa ter   s pots ,   whic a r e   c a ll e d   hots pots ,   to  r e main.   Evaluation Warning : The document was created with Spire.PDF for Python.
                                I S S N :   2088 - 8708   I nt  J   E lec   C omp   E ng ,   Vol .   15 ,   No.   1 F e br ua r y   20 25 :   280 - 291   282       F igur e   1 .   3D  de s ign  a utom a ti c   c lea ning  s ys tem           F igur e   2 .   De s ign  of   body  c lea ning  s ys tems       F igur e   s hows   the  wor k f low  o f   the  a utom a ti c   c lea ning  s ys tem  be gins   by  s e lec ti ng  e it he r   a utom a ti c   or   manua mode.   I f   the   a utom a ti c   mode  is   s e lec te d,   the  main  input   is   a   pr e de f ined  ti me  s c he dule  to   a c ti va te  the  s ys tem.   I f   the  manua mode  is   s e lec ted,   the  us e r   c a a c ti va te  the  c lea ning  s y s tem  us ing  th e   butt on  pr ovided  in   the   B lynk  a ppli c a ti on .   I f   the   s ys tem  i s   a c ti ve ,   the   c ontr oll e r   c omm a nds   the  r e lay  to   a c t ivate   the  pump  f or   5   s .   T he n,   the  DC   mot o r   moves   f o r wa r unti it   r e a c he s   li mi s witch  A.   T he   mot or   then   s topped  f or   s   be f or e   movi ng  ba c kwa r unti it   r e a c he li mi s witch  B .   Onc e   the  c lea ning  pr oc e s s   is   c om plete ,   the  s ys tem  pe r f or ms   dr ying   us ing  the  s a me  c lea ning  s e que nc e ,   but  the  pu mp  is   not   a c ti va ted.   B a s e on  the  s ys tem  de s ign  in  F igur e   4,   ther e   a r e   s e ve r a input s   s uc a s   s e lec tor   s witche s ,   pus butt ons ,   a nd   li mi t   s witche s .   T his   inpu ins tr uc ts   t he   E S P 32  c ont r oll e r   to   dr ive   the   a c tuator   in   the  f or o f   a   mol a r   pump   a nd   a   GW 4632 - 370  mot or .   S e lec tor   s witch   B   pr ov ides   manua a nd   a utom a ti c   f unc ti ons   to   de ter mi ne   whe ther   the  s ys tem  r uns   a utom a ti c a ll or   manua ll y .   W he n   s e lec ti ng  manua c ondit ions ,   t he   s ys tem  c a be   s tar ted  o r   s topped  on   de mand  by   s e lec ti ng  butt ons   B   or   C .   T he   pump   pr ovides   p r e s s ur e   that  c a us e s   wa ter   to  p r oduc e   the   opti mal   s pr a diame ter .   T he   s pr a c lea ns   the  a tt a c he dus a nd   bir d   dr oppings   a nd  c a lowe r   the   P tempe r a tur e .   A   mot or   is   us e to  r u body   c lea ning  hor izonta ll y   s that  the   c lea ning  pr oc e s s   r uns   e ve nly.   li mi t   s witch  is   us e to  r otate   the  di r e c ti on  of   the  mo tor   whe it   r e a c he s   the  e nd  of   the   of f - gr id   s olar   pa ne l.   T he   f oll owing   e qua ti ons   a nd   c a lcula ti ons   we r e   us e d   to   de ter mi ne   [ 18]   the   time   r e quir e d   f or   a   whe e l   to   move   f r om   one   e nd   of   the   s olar   pa ne l   to   the   othe r   at   a   mot or   s pe e d   of   40   r e volut ions   pe r   mi nute  ( R P M ) .     =  × 1 / 60     = 40 × 1 / 60   ( 1)   = 0 . 66          F r om   ( 1) ,   the   f r e que nc y   wa s   f ound   to   be   0. 66   r o t a ti ons   pe r   s e c ond   ( R P S ).   F r om   th is   va lue,   we   can   f ind   the   a ngular   ve locity   ( )   us ing   the   e qua ti on   be low   [ 19 ] .     = 2 ×     = 2 ( 3 . 14 ) × 0 . 66   ( 2)   = 4 . 14   /       F r om   ( 2) ,   the   a ngular   ve locity   wa s   f ound   to   be   4. 14   r a d/s .   S ince   the   a ngular   ve locity   is   known ,   the   ne xt   s tep   is   to   f ind   the   li ne a r   ve locity   us ing   the   known   a ngul a r   ve locity   [ 20 ] .   Evaluation Warning : The document was created with Spire.PDF for Python.
I nt  J   E lec   C omp   E ng     I S S N:   2088 - 8708       Optimal  c leaning  r obot  on   s olar   pane ls   w it ti me - s e que nc e   input   bas e on  int e r ne   ( Dw N ur   F it r i y anah )   283   = ×     = 0 . 035 × 4 . 14   ( 3)   = 0 . 144   /       B a s e d   on   ( 3) ,   the   li ne a r   ve locity   wa s   c a lcula ted   as   0. 144   m/ s .   Ne xt,   the   tot a l   time   take n   by   the   tec hn ology   to   c ove r   the   dis tanc e   wa s   c a lcula ted.   T he   dis tanc e   c o ve r e d   wa s   3. 78   m   ×   2   ( due   to   the   ba c k - a nd - f or th   mot ion) .   T he   f oll owing   e qua ti on   wa s   us e d   [ 21] :     = /     = ( 7 . 56   ) / ( 0 . 1 4 4   / )   ( 4)   = 52 . 5         B a s e d   on   ( 4) ,   the   whe e l   r e quir e d   52. 5   s   to   c lea n   f r om   one   e nd   of   the   s olar   pa ne l   to   the   other   at   a   mot or   s pe e d   of   40   R P M .   If   thi s   p r oc e s s   is   r e pe a ted   4   ti mes ,   the   tot a l   dur a ti on   is   210   s   ( a ppr oxim a tely   3 . 5   mi n ) .           F igur e   3 .   F lowc ha r t   a utom a ti c   c lea ning  s ys tem   Evaluation Warning : The document was created with Spire.PDF for Python.
                                I S S N :   2088 - 8708   I nt  J   E lec   C omp   E ng ,   Vol .   15 ,   No.   1 F e br ua r y   20 25 :   280 - 291   284       F igur e   4 C ontr ol   s ys tem  de s ign  of   the   c lea ning  tec hnology  on  s olar   pa ne ls       3.   RE S UL T S   AND   DI S CU S S I ON   3. 1.     M ot or   t r an s m is s ion   c ali b r at ion   M otor   tes ti ng   wa s   c a r r ied   out   in   F igur e   5   to   de ter mi ne   the   va lue   of   r otation   pe r   mi nute   whe g iven  a   load  or   not  g iven  a   load.   T he   r e s ult s   of   c a lcula ti ons   ba s e on  mot or   s pe c if ica ti ons   c ompar e with  a   s tanda r mea s ur ing  ins tr ument,   na mely  a   tac homete r .   B k nowing  the  r pm,   you   c a c a lcula te  the   ti me  r e quir e f or   the   s ys tem  to  c lea n.   T he   R P M   mea s ur e ments   we r e   pe r f or med  us ing   a   nonc ontac tac homete r   that   wa s   f i r e a the  mot or .   B a s e on  s e ve r a e xpe r im e nts   c onduc ted  w it va r iations   in   volt a ge ,   the   obtaine volt a ge   da ta  a nd  r pm   va lues   we r e   c ompar e to  the   tac homete r .   B a s e on  the   no - load  mot or   tes gr a phic ,   the  h ighes obtaine powe r   wa s   2. 52   W .   T he   input   volt a ge   to  the   mot or   a f f e c ts   the  r e s ult ing  s pe e d.   T he   g r e a ter   the   va lue  o f   the  input   volt a ge   ,   the   f a s ter   the  mot or   s pe e d   will   a ls be   f a s ter .   C onve r s e ly,   if   the  input   vo lt a ge   is   low,   the  mot o r   s pe e will   a ls be   low.   F igur e   6( a )   a nd   F igur e   6( b )   s hows   R P M   tes ti ng  on  mot or   a nd  mot or   2.   T his   tes wa s   c a r r ied  out  to   de ter mi ne   w he ther   the   r pm  o f   the   mot or   wa s   in   a c c or da nc e   wi th  the  c a lc ulation  by   knowing   how   long   the   s ys tem  wa s   r unn ing  f r om   s tar to  s top.             F igur e   5 .   M otor   R P M   tes ti ng   Evaluation Warning : The document was created with Spire.PDF for Python.
I nt  J   E lec   C omp   E ng     I S S N:   2088 - 8708       Optimal  c leaning  r obot  on   s olar   pane ls   w it ti me - s e que nc e   input   bas e on  int e r ne   ( Dw N ur   F it r i y anah )   285       ( a )   ( b)     F igur e   1 .   Gr a ph   R P M   tes ti ng:  ( a )   mot or   a nd   ( b)   mot or   2       3. 2.     T e s t in g   t h e   E S P 32   Wi - Fi   m od u le  r an ge   T he   ove r a ll   tes ti ng  of   the  c omponents   in  thi s   s tudy  wa s   c onduc ted  in  a ope s pa c e   to  a void  dis r upti ng  W i - F s ignal  pr opa ga ti on.   T e s ti ng  wa s   c a r r ied  out  in  the  I ns tr umenta ti on  E nginee r ing  De pa r tm e nt,   a s   s hown  in  F igur e   7 .   I thi s   tr ial ,   the   int e r ne wa s   us e a s   a   c onne c ti on  be twe e the  a utom a ti c   c lea ning   de vice   a nd  the   s mar tphone.   T he   pur pos e   of   thi s   t e s wa s   to  de ter mi ne   the   r a nge   o f   the  a utom a ti c   c lea ning   de vice 's   c ontr ol  with  the  s mar tphone .   He r e ,   we   p r e s e nt  thethe r   r e s ult s   of   the  W i - F modul e   r a nge   tes t.   T he   da ta  in   T a ble  1   s how  the  dis tanc e   be twe e the   a c c e s s   point   a nd  the  W i - F modul e   on  the   E S P 32   mi c r oc ontr oll e r   f or   the  a utom a ti c   c lea ning   de vice .   T he   a c c e s s   point   to  the  W i - F modul e   of   the  c lea ning  de vice   c a be   c ontr oll e f r om  a   dis tanc e   of   to  1 m.   At  dis tanc e s   of   16 25  m,   the  c onne c ti on  be t we e the   a c c e s s   point   a nd  the  W i - F modul e   be ga to  we a ke n,   r e s ult ing  in  s igni f ica nt   de lays   in  c ontr oll ing  the   c lea ning  de vice .   At   dis tanc e s   of   a t   lea s 31   m,   the   c onne c ti on  be twe e the  a c c e s s   point   a nd   the  W i - F i   modul e   is   los t,   a nd  the  a utom a ti c   c lea ning  de vice   c a nnot  be   c ontr oll e d.   T his   indi c a tes   that  the  W i - F modul e   on  the  E S P 32  mi c r oc ont r oll e r   c a be   we ll c ontr ol led  a a   dis tanc e   of   up  to  25  be twe e a c c e s s   point s .   How e ve r ,   the  a ppli c a ti on’ s   c onne c ti on  to  the  E S P 32   mi c r oc o ntr oll e r   thr ough   B lynk  c a be   a c c e s s e a nd  c ontr oll e r e mot e ly  f r om  a   dif f e r e nt  loca ti on   [ 22] [ 26]   a s   lon a s   the  W i - F modul e   on  the  mi c r oc ont r oll e r   is   c o nne c ted   to  the  int e r ne t .   T his   a ll ows   us e r s   to  r e mot e ly  inpu their   c lea ning  ti me  s c he dule  a nd  c ontr ol  their   de vice s   via   the  B lynk  a ppli c a ti on  on   their   s mar tphone .           F igur e   7.   R a nge   a r e a   E S P 32  W i - F modul e       T a ble  1.   T e s ti ng  the   E S P 32   Wi - Fi   M odule   R a nge   No   D is ta nc e   ( M e t e r s )   S ta tu s   D e la y   ( s )   D e s c r ip ti on   1   1 - 5   C onne c te d   1.05   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w e ll .   2   6 - 10   C onne c te d   1.23   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w e ll .   3   11 - 15   C onne c te d   1.11   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w e ll .   4   16 - 20   Weak   c onne c ti on   09.38   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w it h   a   de la y.   5   21 - 25   Weak   c onne c ti on   10.01   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w it h   a   de la y   6   26 - 30   Weak   c onne c ti on   C a n’ t   An   a ut oma ti c   c le a ni ng   to ol   can   ope r a te   w it h   a   de la y.   7   31 - 35   U nc onne c te d   C a n’ t   An   a ut oma ti c   c le a ni ng   to ol   c a nnot   ope r a te     Evaluation Warning : The document was created with Spire.PDF for Python.
                                I S S N :   2088 - 8708   I nt  J   E lec   C omp   E ng ,   Vol .   15 ,   No.   1 F e br ua r y   20 25 :   280 - 291   286   3. 3.     Qu ali t at ive   an d   q u an t it at ive   t e s t in g   r e s u lt s   of   t h e   c leani n t e c h n ology   I n   t his   tes t in g ,   two   m a i n   a s pe c ts   we r e   in de pe nd e n t ly   e va lu a t e d   to   a s s e s s   t he   c l e a n in g   de v ic e s   p e r f o r m a n c e t he   q ua li ty   o f   t he   c lea n in te c h no lo gy   a n d   t he   s ola r   pa ne l   ou tp u t .   T he   c le a n in g   t e c h no lo g wa s   a s s e s s e d   f o r   it s   e f f e c ti ve ne s s   in   r e m ov in g   de b r is   w it h ou t   d a m a g in g   t he   pa ne ls ,   w hi le   t he   s ola r   pa ne l   o ut p ut   wa s   m e a s u r e d   be f or e   a n d   a f te r   c lea ni ng   to   de te r mi ne   ho w   m uc h   t he   pr oc e s s   i mp r ove d   e ne r g y   e f f i c i e nc y .   T o ge th e r ,   t he s e   e va l ua t io ns   p r o v ide d   a   c o mp r e he ns i ve   v ie w   o f   t he   de vi c e s   i m pa c t   o n   s o la r   pa n e l   pe r f o r ma nc e .     3. 3. 1.   Qu al it at ive   t e s t in o f   t h e   c leani n g   t e c h n ol ogy   T he   qua li tative   tes ti ng   in   F igur e   8 ,   the  f oc us   wa s   on  a s s e s s ing  the  ove r a ll   c lea ning  pe r f or manc e   of   the  pr opos e tec hnology .   Dr y   ti s s ue s   we r e   us e a s   tool s   to   s im ulate   the  c lea ning   pr oc e s s   on   the   s olar   pa ne l   s ur f a c e s .   Obs e r va ti ons   we r e   made   to  e va lu a te  how  we ll   the  tec hnology  r e moved  dir t,   dus t,   a nd  other   c ontaminants   f r om  the   pa ne ls .   B a s e on  the  r e s ult s   of   qua l it a ti ve   tes ti ng  in   T a ble  2,   the  mos e f f e c ti ve   c lea ning  method   f o r   dif f e r e nt  types   of   c ontaminants   on  s olar   pa ne ls   wa s   identif ied.   pump  with  a   volt a ge   of   12  is   r e c omm e nde whe de a li ng  with  s tubbor bir dr opp ings .   T his   higher   volt a ge   pr ovides   s uf f icie nt  wa ter   pr e s s ur e   a nd  f or c e   to  e f f e c ti ve ly  r e move  tough   b ir d   dr oppings   f r om   s olar   pa ne ls .   On   the   other   ha nd ,   whe s olar   pa ne ls   a r e   c ombi ne with   dus t   a nd  bi r d   dr oppings ,   a   pump   with  a   volt a ge   of   10   is   f ound   to   be   the   opti mal   c h oice   [ 27] T his   volt a ge   leve pr ovides   a de qua te  c lea ning  po we r   f or   both  types   of   c ontaminants .   F or   r e gular   c lea ning   tas ks ,   whe r e   the  s olar   pa ne ls   mainly  ha ve   dus a n li ghter   c ontaminants ,   a   pump  with   a   volt a ge   of   c a be   us e d.   T his   low   volt a ge   s ti ll   p r ovides   e f f icie nt   c lea ning  while  s a ving   powe r   by   us ing  a   volt a ge   lowe r   than  the   pump’ s   s pe c if ica ti ons .             F igur e   8.   T e s ti ng  c lea ning   tec hnology  on  s olar   pa n e ls       T a ble   2 .   T e s ti ng   the   qua li ty  o f   the   c lea ning  tec hnology       3. 3. 2.   Qu an t it a t ive   t e s t in g   of   s olar  p an e l   ou t p u t   T his   tes ti ng   e va luate the   dif f e r e nc e   in   s olar   pa ne output   powe r   whe a n   a utom a ti c   c lea ne r   wa s   us e a nd  whe it   wa s   not.   T he   f oc us   wa s   on  a na ly z ing  how  c lea ning  im pa c ts   the  pe r f or manc e   of   s ol a r   pa ne ls   by  mea s ur ing  ke pa r a mete r s   s uc a s   the  outpu volt a ge ,   c ur r e nt ,   a nd   tempe r a tur e .   B c ompa r i ng  thes e   pa r a mete r s   be f or e   a nd  a f ter   the  c lea ning  pr oc e s s ,   thi s   s tudy  qua nti f ies   the  im pr ove ments   in  pa ne e f f icie nc a nd  the  e f f e c ti ve ne s s   of   the   a utom a ti c   c lea ne r   in   m a int a ini ng  opti mal  s olar   pa ne pe r f o r manc e .   F igur e   9   is   a   qua nti tative  tes t   of   s olar   pa ne ou tp ut,   whic mea s ur e s   the   output   of   the   s olar   pa ne be f or e   a nd   a f ter   c lea ning.   B a s e on  the   tes da ta   o btaine in   T a ble s   3   a nd   4 ,   the  ir r a diation   va lue  wa s   a lm os the  s a me  but  ha a   dif f e r e nt  output   powe r .   W he tes ted,   the  s olar   pa ne ls   that  ha ve   not   be e c lea ne c a pr oduc e   a   powe r   o f   334 . W a tt hour   ( W h) ,   a nd  whe tes ted  a f ter   c lea ning  us ing  a n   a utom a ti c   s o lar   pa ne c lea ne r ,   it   c a ge ne r a te  a   powe r   of   605 . W .   I c a be   s e e that  the  dif f e r e nc e   is   ve r s igni f ica nt,   whic is   e qua to  271. 4   W .   P ump   vol ta ge   ( V ol t)   S ol a r   pa ne l   c ondi ti on   be f or e   c le a ni ng   S ol a r   pa ne l   c ondi ti on   a f te r   c le a ni ng   12   T he r e   a r e   mos qui to   r e pe ll e nt   pow de r   a nd   por r id ge   C le a n   th e   th e   s ol a r   pa ne l   w it hout   le a vi ng   a ny   w a te r   be hi nd   10   T he r e   a r e   mos qui to   r e pe ll e nt   pow de r   a nd   por r id ge   C le a n   th e   s ol a r   pa n e l   w it hout   le a vi ng   a ny   w a te r   be hi nd   8   T he r e   a r e   mos qui to   r e pe ll e nt   pow de r   a nd   por r id ge   C le a n   th e   s ol a r   pa n e l   w it hout   le a vi ng   a ny   w a te r   be hi nd   6   T he r e   a r e   mos qui to   r e pe ll e nt   pow de r   a nd   por r id ge   U nc le a n   a nd   w it hout   le a vi ng   a ny   w a te r   4   T he r e   a r e   mos qui to   r e pe ll e nt   pow de r   a nd   por r id ge   U nc le a n   a nd   w it hout   le a vi ng   a ny   w a te r   Evaluation Warning : The document was created with Spire.PDF for Python.
I nt  J   E lec   C omp   E ng     I S S N:   2088 - 8708       Optimal  c leaning  r obot  on   s olar   pane ls   w it ti me - s e que nc e   input   bas e on  int e r ne   ( Dw N ur   F it r i y anah )   287         F igur e   9 .   Qua nti tative   tes ti ng  o f   the   s olar   pa ne ou put       T a ble   3 .   Qua ntt it a ve   tes of   s olar   pa ne ouput   with out  a utom a ti c   c lea ne r   a nd  d ir t   T im e   ( V ol ta ge )   ( A mpe r e )   P ow e r   ( W a tt )   T e mpe r a tu r e   ( ° C)   I r r a di a ti on   ( W /m 2 )   09: 00   13.66   0.06   0.819   28.8   750.3   10: 00   19.97   3.4   67.8   51.7   859.1   11: 00   18.86   3.9   73.5   52.5   946.1   12: 00   17.77   3.8   67.5   56.5   865.5   13: 00   19.75   3.7   73.0   53.5   789.5   14: 00   14.46   3.4   49.1   34.5   76.3   15: 00   14.03   0.06   0.84   34.5   74.4   16: 00   13.83   0.06   0.83   29.1   65.6   17: 00   13.76   0.06   0.82   27.5   52.4   T ot al       334.2   Wh         T a ble   4 .   Qua ntt it a ve   tes of   s olar   pa ne ouput   a f ter   a utom a ti c   c lea ning  a nd  dir t   c lea ning   T im e   ( V ol ta ge )   ( A mpe r e )   P ow e r   ( W a tt )   T e mpe r a tu r e  ( °C )   I r r a di a ti onn   ( W /m 2 )   09: 00   30.02   0.06   1.80   28.6   758.4   10: 00   17.97   7.43   133.5   47.5   872.0   11: 00   16.96   7.60   128.8   48.3   972.4   12: 00   17.36   7.38   128.1   51.0   983.6   13: 00   17.66   7.04   124.3   50.0   903.3   14: 00   17.29   5.02   86.7   40.3   616.5   15: 00   13.78   0.06   0.82   29.8   101.6   16: 00   13.54   0.06   0.81   27.4   51.7   17: 00   13.35   0.06   0.80   25.5   16.9   T ot al       605.6   Wh         B a s e a s   the  gr a ph  in  F igur e   10 ,   the  r e s ult s   obtaine on  the  pa ne be f or e   be ing   c lea ne a nd  tr e a ted   with  dir a r e   s hown  a s   a   blac gr a ph  indi c a ti ng  that  the  gr a ph  ha s   the  lowe s gr a ph.   T he   highes powe r   wa s   obtaine a 11:00  ha s   a n   output   powe r   of   73. 5   w a tt s .   T he n,   on  the   r e g r a ph  is   a   s olar   pa ne l,   whi c a f ter   c lea ning  with  a   c lea ning  tool   s hows   that  the  g r a p ha s   the  highes gr a ph  with  the  highes powe r   ob taine a 10:00  ha ving   a output   powe r   of   133 . wa tt s .   T he r e f or e ,   the   gr a ph   of   the  s olar   pa ne a f ter   c lea ning  s hows   a   s igni f ica nt  dif f e r e nc e   in   output   powe r .           F igur e   10.   Gr a ph   of   the   powe r   outpu c ompar is on  r e s ult s   Evaluation Warning : The document was created with Spire.PDF for Python.
                                I S S N :   2088 - 8708   I nt  J   E lec   C omp   E ng ,   Vol .   15 ,   No.   1 F e br ua r y   20 25 :   280 - 291   288   B a s e on  the  gr a ph   in  F igur e   11 ,   the  pa ne l   be f or e   e xpos ur e   to  s pr a wa ter   is   r e pr e s e nted  by  a   blac c ur ve ,   indi c a ti ng  that  the  gr a ph  obtaine the  highe s tempe r a tur e .   T he   highes tempe r a tur e   r e c or de a 14:00  UT   wa s   56. 5   °C .   T he n,   on  the  r e gr a ph  T he n,   o the  r e gr a ph  is   a   s olar   pa ne whic a f ter   be ing   c lea ne with  a   c lea ning  tool   c ontaining   s pr a wa ter   s ho ws   that  the  gr a ph  ha s   the  lowe s g r a ph  with  the   highes tempe r a tur e   obtaine a 12:00   with   a   tempe r a tur e   of   51 . °C .   T he r e f or e ,   a f ter   c lea ning  the  s olar   p a ne l,   the   tempe r a tur e   dif f e r e nc e   is   ve r s igni f ica nt.           F igur e   11.   T e mper a tu r e   c ompar is on  r e s ult s       3. 3. 3.   Op t im al   c leani n c alcul a t ion   r e s u lt s   T he   r e s ult s   of   thi s   c a lcula ti on   we r e   us e d   to   de ter m ine   the   opti mal   time   f or   c lea ning   the   s olar   pa ne ls .   T his   c a lcula ti on   is   ba s e d   on   the   r e s ult s   of   the   s ola r   pa ne l   output   powe r   tes t   da ta   s hown   in   T a ble   3,   in   whic h   the   s olar   pa ne ls   we r e   unde r   dus t   c ondit ions ,   a nd   the   tes t   da ta   r e s ult s   s hown   in   T a ble   4.   F or   dus t   c o ndit ions ,   s olar   pa ne ls   can   p r oduc e   an   output   powe r   of   334 . 2   W h.   W he n   s olar   pa ne ls   a r e   dus t - f r e e   or   c lea ne d   with   an   a utom a ti c   c lea ning   tool ,   they   can   p r oduc e   an   output   powe r   of   605. 6   W h .   T his   c a lcula ti on   s im ulate s   c a lcula ti ons   f or   time   pe r iods   of   1   we e k,   2   we e k s ,   3   we e ks ,   4   we e ks ,   or   1   mont h.   T he   opti mal   c lea ning   c a lcula ti on   f or mul a   is   as   ( 5) .        =                               × 100%   ( 5)     C a lcula ti on   of   opti mal   c lea ning   e f f icie nc y   with in   1   we e k.   S olar   pa ne ls   unde r   dus t   c ondit ions   pr oduc e   an   output   powe r   of   334. 2   W h,   mul ti pli e d   by   7   da ys   or   a   we e k,   pr oduc ing   a   powe r   of   2 , 33 9. 4   W h.   T he n,   the   s olar   pa ne ls   a f ter   c lea ning   p r oduc e   an   output   powe r   of   605. 6   Wh   mul ti pli e d   by   6   da ys   b e c a us e   1   da y   the   a utom a ti c   c lea ning   de vice   is   tur ne d   on,   pr oduc ing   3 , 633. 6   W h.   T he   e qua ti on   ( 6)   is   the   opti mal   e f f icie nc y   c a lcula ti on   f o r   7   da ys   or   onc e   a   we e k .        =   3633 . 6 2339 . 4 2339 . 4 × 100% = 55 . 32%   ( 6)     C a lcula ti on   of   opti mal   c lea ning   e f f icie nc y   wi thi n   2   we e ks .   S ola r   pa ne ls   unde r   dus t   c ondit ions   pr oduc e   an   output   powe r   of   334. 2   W h,   mul ti pli e d   by   14   da ys   or   a   we e k,   pr oduc ing   a   powe r   of   4 , 67 8. 8   W h.   T he n,   the   s olar   pa ne ls   a f ter   c lea ning   pr oduc e   an   o utput   powe r   of   605 . 6   Wh   mul ti pli e d   by   13   da ys   be c a us e   1   da y   the   a utom a ti c   c lea ning   de vice   is   tur ne d   on,   pr oduc ing   7 , 872. 8   W h.   T he   e qua ti on  ( 7)   is   the   opti mal   e f f icie nc y   c a lcula ti on   f o r   14   da ys   or   twice   a   we e k .        =   7872 . 8 4678 . 8 4678 . 8 × 100% = 68 . 27%   ( 7)     C a lcula ti on   of   opti mal   c lea ning   e f f icie nc y   wi thi n   3   we e ks .   S ola r   pa ne ls   unde r   dus t   c ondit ions   pr oduc e   an   output   powe r   of   334. 2   W h,   mul ti pli e d   by   21   da ys   or   a   we e k,   pr oduc ing   a   powe r   of   7 , 01 8. 2   W h.   T he n,   a f ter   c lea ning,   the   s olar   pa ne ls   p r oduc e   an   o utput   powe r   of   605 . 6   Wh   mul ti pli e d   by   20   da ys   b e c a us e   1   Evaluation Warning : The document was created with Spire.PDF for Python.
I nt  J   E lec   C omp   E ng     I S S N:   2088 - 8708       Optimal  c leaning  r obot  on   s olar   pane ls   w it ti me - s e que nc e   input   bas e on  int e r ne   ( Dw N ur   F it r i y anah )   289   da y   the   a utom a ti c   c lea ning   de vice   is   tur ne d   on,   pr oduc ing   12 , 112   W h.   T he   e qua ti on   ( 8 )   is   the   opti mal   e f f icie nc y   c a lcula ti on   f o r   21   da ys   or   th r ice   a   we e k .        =   12112 7018 . 2 7 0 1 8 . 2   × 100% = 72 . 58%   ( 8)     C a lcula ti on   of   the   op ti mal   c lea ning   e f f icie nc y   wit hin   4   we e ks   or   1   mon th.   S olar   pa ne ls   unde r   dus t   c ondit ions   pr oduc e   an   output   powe r   of   334. 2   W h ,   mul ti pli e d   by   30   da ys   or   a   we e k,   pr oduc ing   a   p owe r   of   10 , 026   W h.   T he n ,   a f te r   be ing   c lea ne d,   the   s olar   p a ne ls   pr oduc e   an   output   powe r   of   605. 6   Wh   mul ti pli e d   by   29   da ys   be c a us e   1   da y   the   a utom a ti c   c lea ning   de v ice   is   tur ne d   on,   pr oduc ing   17 , 562 . 4   W h.   T he   e qu a ti on   ( 9)   is   the   opti mal   e f f icie nc y   c a lcula ti on   f o r   30   da ys   or   1   mont h .        =   17562 . 4 10026 10026 × 100% = 75 . 17%   ( 9)     T he r e f or e ,   ba s e d   on   opt im a l   c lea ning   c a lcula ti on s   at   time   in ter va ls   of   onc e   a   we e k,   onc e   2   we e ks ,   onc e   3   we e ks ,   a nd   onc e   a   mont h,   it   s hows   that   the   opti mal   c ondit ions   that   a r e   the   highes t   or   mos t   e f f ic ient   f or   c lea ning   a r e   onc e   a   mont h   with   an   e f f icie nc y   va lue   of   75 . 17% .       4.   CONC L USI ON     T his   tec hnology   is   e f f e c ti ve   f or   c lea ning   dus t   a n d   a nim a l   wa s te   that   a dhe r e s   to   s olar   pa ne ls .   T he   dis tanc e   be twe e n   the   a c c e s s   point   a nd   the   Wi - Fi   modul e   on   the   E S P 32   mi c r oc ontr oll e r   f or   the   a utom a ti c   c lea ning   de vice   indi c a tes   that   the   Wi - Fi   modul e   on   the   E S P 32   mi c r oc ont r oll e r   can   be   we ll   c ont r o ll e d   at   a   dis tanc e   of   up   to   25   mete r s   be twe e n   the   a c c e s s   poi nt.   ba s e d   on   the   r e s ult s   of   qua li tat ive   tes ti ng   in   c a r r ying   out   the   be s t   c lea ning,   that   is ,   if   the   c ondit ion   of   the   s olar   pa ne l   ha s   s tubbor n   bi r d   dr oppings ,   a   pum p   with   a   volt a ge   of   12   can   be   us e d.   T he n,   if   the   c ondit ion   of   the   s olar   pa ne ls   ha s   dus t   a nd   bir d   dr oppings ,   you   can   us e   a   pump   with   a   volt a ge   of   10   a nd   a   pump   with   a   v olt a ge   of   8   be c a us e   it   can   c lea n   di r t   a nd   lea ve   li tt l e   wa ter ,   a nd   it   can   a ls o   s a ve   powe r   be c a us e   it   us e s   a   lowe r   volt a ge   than   the   pump   s pe c if ica ti ons .   T he   r e s ult s   of   the   powe r   output   in   tes ti ng   s olar   pa ne ls   that   ha ve   not   be e n   c lea ne d   can   pr oduc e   a   powe r   of   334. 2   W h,   a nd   in   tes ti ng   a f ter   c lea ning   us ing   an   a utom a ti c   s olar   pa ne l   c lea ne r ,   it   can   ge ne r a te   a   powe r   of   605. 6   W.   It   can   be   s e e n   that   the   dif f e r e nc e   is   ve r y   s igni f ica nt,   whic h   is   e qua l   to   271 . 4   W.   T he   highes t   powe r   wa s   obt a ined   at   11:00,   a nd   the   output   powe r   wa s   73 . 5   wa tt s .   T he n,   on   the   r e d   g r a ph   is   a   s olar   pa ne l,   whic h,   a f ter   c lea ning   with   a   c lea ning   tool ,   s hows   that   the   gr a ph   ha s   the   highes t   powe r   at   10:00   with   an   output   p owe r   of     133. 5   wa tt s .   B a s e d   on   the   opti mal   s olar   pa ne l   c lea ning   c a lcula ti on,   the   opti mal   c lea ning   c ondit ions   a r e   onc e   a   mont h,   with   an   e f f icie nc y   of   75. 17% .       AC KNOWL E DGE M E NT S   T he   a uthor s   gr a tef ull y   a c knowle dge   f inanc ial   s uppor t   f r om   the   I ns ti tut   T e knologi   S e puluh   Nope mber   unde r   the   pr ojec t   s c he me   of   s c ientif ic   r e s e a r c h   a nd   the   P ubli c a ti on   W r it ing   a nd   I P R   I nc e nti ve   P r ogr a m   ( P P HK I ) .         RE F E RE NC E S   [ 1]   N A S hof f ia na   e al . ,   P V   ma xi mum   pow e r - 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