Lithium batteries and new solar charger
I am replacing my 4 6V batteries I think 2 lithium, have never been impressed by the 30A PWM charger for my 600W solar, probably my fault for using 8 avg wire on a 9m run. Thinking if I get a Victron ...
Forum Discussion
With 600W wired for 24V nominal it will output 37V max, 15A max.
#10 wire is fine for running 40V*15A input to MPPT. If there is already #8 routed through the roof, - better yet, but the difference will be negligible on 30ft one-way distance from panel to controller. The loss of energy in #10 or #8 will be few amp-hours a day, nothing to worry about.
Post-controller output will be 40-45A max. You don't need 75A MPPT for this, 45A MPPT will do, as long as it can handle 40V input.
#10 wire is fine for running 40V*15A input to MPPT. If there is already #8 routed through the roof, - better yet, but the difference will be negligible on 30ft one-way distance from panel to controller. The loss of energy in #10 or #8 will be few amp-hours a day, nothing to worry about.
Post-controller output will be 40-45A max. You don't need 75A MPPT for this, 45A MPPT will do, as long as it can handle 40V input.
