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I installed a 11.25DC system back in 2019 which has been working great (definitely already paid for itself). And now, after purchasing an EV and with plans to build a garage/apartment next year, I'm looking to add more panels to the existing inverter. The current system is as follows:
SolarEdge SE10000-US (10kw inverter)
30x 375w panels w/ p505 optimizers (2x strings of 15)
DC/AC oversizing - 113%
I want to add 6x 410w panels using the s500b inverters (inverter oversizing jumps to 137%). The easiest option is just to add the 6 panels as its own string (the s500b minimum length is 6 panels) but it appears I may be sacrificing some efficiency with a short string??? With a new separate 3rd 6 panel string, SE estimates that I'll produce 19.21MWH. If I rewire some of the old panels such that I have the 6 new panels and 5 of the old panels in the 3rd string, the production jumps to 19.28MWh. Not a huge difference but I was surprised to see it.
Is it the short string or perhaps uneven strings that is causing the difference?
Thanks all!
SolarEdge SE10000-US (10kw inverter)
30x 375w panels w/ p505 optimizers (2x strings of 15)
DC/AC oversizing - 113%
I want to add 6x 410w panels using the s500b inverters (inverter oversizing jumps to 137%). The easiest option is just to add the 6 panels as its own string (the s500b minimum length is 6 panels) but it appears I may be sacrificing some efficiency with a short string??? With a new separate 3rd 6 panel string, SE estimates that I'll produce 19.21MWH. If I rewire some of the old panels such that I have the 6 new panels and 5 of the old panels in the 3rd string, the production jumps to 19.28MWh. Not a huge difference but I was surprised to see it.
Is it the short string or perhaps uneven strings that is causing the difference?
Thanks all!
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