Adding More Solar Panels
i'm looking at Amazon at the Windy Nation 100w and the Eco Worthy 100w panel both are 100w, specs are close 17.4 working volts 5.75 max working amps versus 17.9 working volts and 5.56 working am...
Forum Discussion
With PWM all you care about is amps. Power is MPPT stuff.
So the comparison is Voc 22.41, Isc 6.2 with the EW vs 21.6 and 6.32 with the WN.
IMO the WN wins by itself with the 6.32a, BUT the job is to be in parallel with the existing panels so the voltage match could matter somewhat, where 22.41 and 21.6 are the numbers to compare with the Voc of the remaining existing array.
I suppose depending on the wiring involved in the new arrangement, line losses will vary and make any fine-tuning panel voltage matching hard to realize?
Sounds like the idea would be to remove the old panels first, then get the Voc of the existing remaining array and then do the match? After it is all together, the new array Voc could be compared with the old to see how close you got. (Assuming that will even matter to the big picture)
So the comparison is Voc 22.41, Isc 6.2 with the EW vs 21.6 and 6.32 with the WN.
IMO the WN wins by itself with the 6.32a, BUT the job is to be in parallel with the existing panels so the voltage match could matter somewhat, where 22.41 and 21.6 are the numbers to compare with the Voc of the remaining existing array.
I suppose depending on the wiring involved in the new arrangement, line losses will vary and make any fine-tuning panel voltage matching hard to realize?
Sounds like the idea would be to remove the old panels first, then get the Voc of the existing remaining array and then do the match? After it is all together, the new array Voc could be compared with the old to see how close you got. (Assuming that will even matter to the big picture)
