carl2591 wrote:
I do understand about the wire size and estimate only needing less than 10 ga which is most of the MC4 stuff. so the loss will be less than 1%
Yes, - if you run 3*195W in series. Then you have to buy MPPT, 'cause PWM won't work. TS MPPT 45 is "officially" rated 600W, but 3*230 or 3*235 "flat" will work as well, as long as you don't exceed Voc. Note that standard unit comes with LED indicators only. Display is extra.
Most MC4 extension cables are #10, some are #12 and some are #8. For 3*235W in series you will need #10.
Edit - PS:when I put a low temp of 19°F in the string calculator, "they" came up with voltage at 50.52vdc which is over by 1.56volts when connected in series.
Not sure how you got this 50.52. Check that you're using the right controller and right panel voltages. Your panel is not there but Grape 235W is close, and at 19F it comes to 41.55V. This is 125V for 3 panels in series. TS MPPT 45 should be alright - even with 3*235W.
