mppt vs pwm
Hi, A nice little video comparing mppt vs pwm with the batteries in bulk mode. mppt vs pwm
Forum Discussion
12thgenusa,
"300 watts is more than 245 watts. At 13.5 v output it means 4 amps difference"
Four 250w/24v panels = 1000w.
Six 160w/12v panels = 960w
1000w - 960w = 40w.
40w / 13.5v = ~3a
At 13.5v that's only a 3a difference, and yet a 960w/12v/series array produces 12 amps less than the 1000w/24v/parallel array. So where did the extra 9 amps go? That's a 20% loss.
The comparison being discussed is 12v series (44v) vs. 24v parallel (36v), using mppt. The Rogue comparison is between 12v parallel (17v) vs. 24v parallel (36v). So while the Rogue publication may actually show mppt works a little better with 12v panels, at low amperages, it does not address the issue at hand.
"Panels in series has nothing to do with it"
Real world observations seem to indicate that 12v panels wired in series, coupled with an mppt controller, will produce less output than a single 24v panel of equal wattage.
"300 watts is more than 245 watts. At 13.5 v output it means 4 amps difference"
Four 250w/24v panels = 1000w.
Six 160w/12v panels = 960w
1000w - 960w = 40w.
40w / 13.5v = ~3a
At 13.5v that's only a 3a difference, and yet a 960w/12v/series array produces 12 amps less than the 1000w/24v/parallel array. So where did the extra 9 amps go? That's a 20% loss.
The comparison being discussed is 12v series (44v) vs. 24v parallel (36v), using mppt. The Rogue comparison is between 12v parallel (17v) vs. 24v parallel (36v). So while the Rogue publication may actually show mppt works a little better with 12v panels, at low amperages, it does not address the issue at hand.
"Panels in series has nothing to do with it"
Real world observations seem to indicate that 12v panels wired in series, coupled with an mppt controller, will produce less output than a single 24v panel of equal wattage.
