Is 24v Charging the Same as 12v Charging?
With 24v charging on a 24v battery is everything the same as 12s except half the amps? Same charging profile, SOC vs time etc? Is 8.3 amps with 24v the same exactly as 16.6 amps on a 12v bank of the...
Forum Discussion
jrnymn7 wrote:
Of course, then again, the 24v panel's higher voltage may just wake up the PWM quite early, even at half power.
At 50% panel power (115w), an MPPT would put out about 8.2a @ 14Vcharge (115w/14v), while the PWM would put out about 4.15a (1/2 Isc)... but for how long? Certainly not long enough to make up for 2-3a the rest of the day. So I think your 24v-24v idea may be a good one, provided you don't loose your gains when converting back to usable 12v.
The batteries will be at 24v so it is all full amps for the PWM on the 24v panel. (8.3 is "worth" 16.6) I doubt the PWM controller can run the 24v panel at all on 12v batts (not going to try it either!) I can go panel-direct on 12v batts and get the half-amps worth till Vbat reaches 15v then yank it.
