Solar-Panel to Controller Loss
Much has been made of the lower losses on the panel to controller path with MPPT because the amps are less. So once you have your loss measured, how valuable is it to improve on that if you don't lik...
Forum Discussion
Maybe I'm the only person here who doesn't really care about performance under max sunlight conditions.
By adding the new 300W Can Solar panel, and increasing total wattage to 700W, my 30A controller will be discarding watts on sunny days. Also my line loss increased from 1.8% to 2.5% with the new panel because of the increased Max I at max V.
But I didn't add that panel for sunny summer days. My previous 400W was more than enough to handle our daily needs on sunny days.
What I wanted was more watts on cloudy days and shady sites in the fall, winter, spring. And with the associated lower amps on those days (upto ~500W?), I should be ok both with the controller and with line loss.
(Also the new third panel is located as far as possible away from the other two to help with shading issues.)
Of course this may all change. With the new 1000W inverter we may go crazy with toasters and coffee makers. :E
By adding the new 300W Can Solar panel, and increasing total wattage to 700W, my 30A controller will be discarding watts on sunny days. Also my line loss increased from 1.8% to 2.5% with the new panel because of the increased Max I at max V.
But I didn't add that panel for sunny summer days. My previous 400W was more than enough to handle our daily needs on sunny days.
What I wanted was more watts on cloudy days and shady sites in the fall, winter, spring. And with the associated lower amps on those days (upto ~500W?), I should be ok both with the controller and with line loss.
(Also the new third panel is located as far as possible away from the other two to help with shading issues.)
Of course this may all change. With the new 1000W inverter we may go crazy with toasters and coffee makers. :E
