Kilowatt Power Posted February 25, 2021 Posted February 25, 2021 Greetings, Can I connect 2x405Wp panels for a total of 810Wp in 1S2P configuration on the Axpert MKS 3K-24 (PF1) without any issues? Inverter SCC specifications are Voc 75Vdc, Max PV array power 600W, MPPT range 30~66Vdc and Max PV charge current 25A. Jinko Cheetah HC 72M panels STC/NOCT specifications are Pmax 405/306Wp, Vmp 42.0/39.8V, Imp 9.65/7.72A, Voc 50.1/48.7V and Isc 10.48/8.22A General guidelines here and other forums [FAQ 5] advocate maximum 12.5-20% oversizing but I cannot find panel sizes between 350Wp and 375Wp. Thank you. Quote
Coulomb Posted February 25, 2021 Posted February 25, 2021 (edited) On 2021/02/26 at 12:35 AM, Kilowatt Power said: General guidelines here and other forums [FAQ 5] advocate maximum 12.5-20% oversizing but... I've relaxed my recommendation maximum oversizing a bit, I suspect that 25% is generally ok. Your proposal is 29%, which I think is still too much. Can you find a pair, say 360+410 or 375+410, where the Vmp are within 5% of each other? Edited February 27, 2021 by Coulomb Kilowatt Power 1 Quote
Kilowatt Power Posted February 25, 2021 Author Posted February 25, 2021 31 minutes ago, Coulomb said: Can you find a pair, say 360+410 or 375+410, where the Vmp are within 5% of each other? Found a couple of 345Wp in the last couple of minutes. Other than these we mostly have 405, 450, 460 and 465 panels. Quote
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