Solar
OK, I am ready to install my system which will be 2 255W panels, 45a MPPT controller, I have 2 12v 80 ah batteries which are new and will be replaced in the future with AGM's. The only thing I haven't...
Forum Discussion
JiminDenver wrote:Colo Native wrote:
I don't think we'll get snow but it is Colo. Jim one concern as you stated is heat and if I go with parallel I surely would need to run larger wire down from the j box correct? Series is easier I believe but what is more efficient? I have solar on the house and if one is shaded then the whole system has a lower output but one a RV its charging batteries
At altitude you will be seeing over 20a coming down in parallel. Somewhere on the site is a calculator that you enter the amps and length of run and it will tell you what you would need to avoid voltage drop. The thicker wire isn't going to be much thicker I would think.
Your batteries are a year old? How many cycles? You may be able to add to the bank with little adverse effect.
I have the chart and the voltage loss is .3% for 10 awg and 1.6 wasted watts. If I run parallel could I still use 10 down to the controller or should I go to 8 or 6. Series would just be 10 down to the controller. the panel amps are 9.05 amps (isc) and 8.5 amps(Imp) not many cycles on the batteries
