July 12, 20196 yr i have this two canadian panels,,,,, so one is written IEC1500V and UL 1000v and other one is IEC1000V and UL1000v volts, both are 330w can they be used together or not.
July 13, 20196 yr 17 hours ago, divhy said: can they be used together or not. Yes and no. For panels to work together the best, their specs should be matching each other as close as possible. That way you would get 330watts from both. Look at the difference in between the Imp and Vmp rating, it is just to big in your case. You can run them together, but in Series the one with the highest current rating will be limited to the current of the one with the lowest rating, so you will not get the full potential the first mentioned panel. Theoretically without taking any other losses into consideration you will get , (32.2V+37.2V) * 8.88amp = 616 Watt from a possible 660 watts that the string could have produced if the panels were a perfect match. That is a 44 watt loss from the bottom panel in your picture. The same goes for connecting them in parallel. The voltage that the panel with the highest VMp rating can contributor to the setup, will be limited by the VMp of the other panel. In this case the first mentioned panel will also not be able to give its full potential. Theoretically without taking any other losses into consideration you will loose , (37.2V-32.2V) * 8.88Amp =44.4Watt from the top panel in your pictures.
July 13, 20196 yr Author i will have the string of 3 from the one with 32,2v and the other string of 3 from the one 37.7v then i will parallel them,. will i still loose more or in parallel it will add the currents.
July 13, 20196 yr 5 hours ago, divhy said: will i still loose more or in parallel it will add the currents. You will theoretically then loose 44 x 3 = 132 Watts. (Quick Calculation). IMO a loss you can live with, given you already have the panels.
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