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Hi Trying to help a friend out with a new solar system. calculate he is consuming about with all aircon 38000 watth per day . How ca i calculate the panel quantity and batteries as here in the caribbean we have about 6 hours of full sunlight but still some energy for about 3 hours Have been...

Hi Have five batt racks each 48v 250ah gel batt total 1250ah Had a 275amp master switch on it. the day I had to restart the 2 20v inverter when switch off to may surprise the swich was broken. Did change to another one but notice the switch was burned from the inside . Question what type or...

Have 5 sets of 4x 12v 250 ah gel batt so total 1250ah a48v as the company said guarateed to 800 cycle dischrge of 80% DOD. Question what is considered a discharge cycle ? If I keep the battery at about 50v every day will that NOT be considered a discharge cycle? Hope you have understand...

He has 3 power walls of 48vdc 200ah LIPO each 12 mono solar panels of 560w each. 10kw hybrid inverter split phase with 2 PV inputs But has to decide if change to 2 x 5kw hybrid inverter each with 1 pv input or keep the 10kw inverter. question: what are the VALUE of the different...

have mppt controller of 60amp and a bank of 48v 3.2v(16pcs) 280ah. lipo distance of controller to batteries is about 5 meters . like to know about the los or better what cable in awg should I use then.? awaiting and thnks in advance Bob

Hi Have inverter 48v vdc 120vac with a 60a mppt also 16 pcs 3,2v 280ah lipo batterries (DOD 80%) and 4 pcs mono 500w panels questions at what amp should the batt be charged? should it be suffisient I have 2 refr inverter total 600w tv 200w and fan 75 w and the rest is some ledlight of 5...

Have mppt controller max 150v pv input. with 6 500w 48v 10.23a panel in serial and parallel so total voltage is 144v . question: is the total V to risky as maybe it can cross over 150v when have much sunlight, Awaiting your reply Bob

Hi everybody Using inverter/mppt from top one foshan 4kw 60amp 48vdc 120vac . is 60 amp ok to charge the battery pack 48v 270ah lipo? awaitiing any reply Regards Bob

using 4kw power inverter with a 60a with bms16s 250a on 3.2v lipo battery pack. when the screen gives soc 100% the controller will give a faulty light and tone. and controller says overvoltage of batteries. like to know how to change settings in controller or BMS to fix that. Awaiting your...

Hi am thinking what is better using 2 inverters of 5 kw split phase or one 10kw inverter . Not thinking of selling back to grid only if can be switch to grid when necessary , is that off grid? Dos growatt make sthose inverters? Awaiting answers thnking you all in advance Bob

bought a power inveter at aliexpress but is losing output power . Contacted the seller they say i had to let the inverter work for 2 hours before adding load but still same effect. Who can help with with a solution brand name is FLAMEZUM . Appreciate Robert

Hi I have a 48v system with 20 p-cs of gel batteries 12v 250ah each Every morning as early as possible my system ends up with 50 to 51 volts after using 3 airco the whole night. my question is should the system ends up with 52v for no DOD? Batteries are from greensun with 5 years warranty so...

Hi everyone given 4kw inverter with 60amp max mppt / 16pcs -3.2v 270ah lithium batt 5pcs 500w panels from the mppt to the panels is about 18 meters/60feet apart. quesions is what size of pv cables? All the attention are apreciated thnks Bob

hi friends Using 20 batteries gel type 250ah. 5 group of 48v batt total 1250ah Early in the morning when the panels do not charge the batteries yet i do a check up always 49.-49.8. How can I calculate when there is a Cycle because somebody told me i have to calculate from 50v not from 48v...