"So a 45 amp controller should never be designed with more than a 600 watt array"
I know you guys are talking about MPPT and 24v or higher systems, but please clarify.
with 12v panels and PWM, a 20a controller can do approx. 250w of panels and still have the desired 20% margin the US NEC wants for when amps are higher, such as cloud effect.
This means 40 amps of controller can do 500w of panels safely. But MPPT controllers clip the amps so they can go to the rated amp limit safely
Going with a 235w MPPT 24panel doing 15a max (not clipped) as some have reported, that would mean 40/15 x 235 = 626w of panels.
So is it confirmed by using that 600w for 45a, that MPPT and 24v gets nearly the same amps as 12v and PWM? :) :)
