Slownsy wrote:
I have got what I have which is a great controler and monitor with temp censer, I do not intend to change controler, the question was about the cable 8AVG if it wood be ok or not, if panels sitting flat won't achive ther full capasety of 9A each and som Loss in cable will stil supply the controler with 30a and then larger cable 2AVG or larger from controler to batteries. Thanks.
Frank.
A panel will do its Isc (ignore the lower amp Imp for MPPT) at STC when the panel is aimed at the sun. So how much less you get when the panel is flat depends on how high the sun gets where you are at what time of year.
You can be far enough South in the summer that your flat panel will hit its full Isc rating. So "it depends". Provide some info on where and when before anybody can answer that question.