Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
Forum Discussion
BFL13 wrote:ken white wrote:BFL13 wrote:
I did do AH tests for the PWM by putting only solar on the Trimetric shunt. I had to leave lights and fans on all day so the batts would keep accepting the full solar.
Should be able to repeat those AH tests with MPPT next year with same conditions (location and date) Plotting the curve should show that effect.
Salvo's old graph of MPPT vs direct does show shoulder hours of 2.5a vs 3a then 5 vs 5.75 then 8 vs 8.3 mid-day. So the MPPT effect gets smaller in proportion as the sun rises
But the absolute gain in amps stays about the same all day at say 1/2 an amp so the AH gain is not greater during the shoulder hours than at mid-day. Unless I am mixed up again. :(
Were the panels wired in series when tested?
No. it was his single 130w 12v panel comparing no controller (same as PWM) with an MPPT controller. I don't have the link. Maybe search the title of his graph "Solar Current: MPPT vs Direct Connection" I have a paper copy I saved.
Not really going to see the MPPT benefit unless you can increase the power/voltage bandwidth that occurs during lower light conditions.
