Hello All, I need a bit Help I am designing a Solar pV power system off grid with the following specification of the Solar Panels:

Panel Wattage: 190W Mono
Maximum Power Voltage (Vmp): 44.8v
Open Circuit Voltage (Voc): 36.5v
Maximum Power Current (lmp): 5.2A
Short Circuit Current (Isc): 5.42

I am designing a 24 volts Solar Pv System with battery bank, have placed 13 Solar Panels of 190watts of above specs and also put 2 X 60A Solar Charge COntroller of PWM Technology. I just want to know that is this design feasible for off grid and will work on these controller since the VoC of panels are high or do i need to design the 36v system?, please any ony suggest or share his expert advice thanks!

There appears to be slight error somewhere. The Voc is always more than the Vmp. You might have put the specs the other way round. Further how you have done the sizing of the battery and what autonomy you have considered ? 13 panels means 67.6 Amps of PV current. There is no need for using 2 nos. of CCs. But the current ratings should be 75 Amps for this regulator. A 24 V/75 A Charge controller is good.

Dear Mr. Rakesh, Many thanks for your reply. Yes it was my mistake its actually Open Circuit Voltage (Voc): 44.8 and Maximum Power Voltage (Vmp): 36.5 .. I have put 4 x 150 Ah Batteries in the system since the usage till will be from 9:00 A.M. to 6:30 P.M. with 50% depth of discharge and no autonomy. What if i will go with 2 X 40A/24V charge controllers? will they work fine with the systeM?

Based on the corrected Vmp, those look like 60 cell modules, pretty typical today. You will need a MPPT charge controller for this design to work. It definitely won't work as a 36v system as-is. Can you add another module so you have an even number? How hot is the ambient temperature, and are these VRLA or Flooded batteries - you will likely need two modules in series to achieve equalization voltages in hot conditions. Alternately use four strings of three, but any successful arrangement will require MPPT.

Dear Phil, it's is a 72 cell module .. i can't add 1 more panel but yes i can reduce 1 panel to make it 12 .. the temprature over here is around 40 Dergee Centigrade max in summers and i am using VRLA Batteries and i cant make a 48 volts system since i am using 1500watts inverter and the load is only 1180 watts AC so i think making a 48v system is useless. How about if i make 2 strings of 6 Panels with MPPT Charge Controller?

Yes, that should work fine. If this is a 24v nominal battery, you will likely need two controllers,