I have installed an off grid system 2.6Kw with 12 Trina PCM05 220 poly panels, 8x200 AH AGM batteries, Midnite classic 150 charge controller and a 2.25Kw inverter. I used 35mm copper, Panels are in 4 strings of 3 panels each(72v with VOC of 110v) due south with 27 degree tilt(summer angle). Right now in mid summer with 12 hours of sunlight and 8 hours of peak sun exposure this system is generating around 12kwh/day with ambient temperatures of 42-48 Celsius. I am new to all this and have now idea how much power should be generated on average. Can anybody guide me if i am producing enough power or do i need to further optimize the system. Because i just keep on thinking that for this many panels i should be generating around 20KwH excluding the losses. Is that right or an over estimation on my part?
Based on the yearly average of 'good sun' hours being 4 - 5 hrs, you are getting a good production amount.
12Kwh / 2.6 = 4.6 hrs so you are right in the middle...
ps you never get name plate watts from your panels, generally derate wattage to 72% = 1.872 Kw
so 12 kwh / 1.872 = 6.4 hrs of good production.
hth
Usmanj
Keep in mind that if you are not using power and your batteries are fully charged, your charge controller will not be collecting power. If I don't need to run my window A/C my KwH is low for the day. But if I am running my A/C all day long and slow cooker I will get easy 3 to 5x more KwH for the day then without my A/C.
I don't know if you have any power draw during the day like TV's or slow cookers.
Mike
Thanks. I put some load on the system today and got 13.7 KwH. From what I got till yet, that's pretty good. Now I have to add around 12 more panels and more batteries to meet my needs. ;D