Quick update...
I believe the different size inverters were an accident and not worth the hassle of making a big deal out of it, as long as the loads were distributed correctly, which after doing my own calculations I believe they were. If not an accident, maybe just an inventory issue. It could have been worse, they could have tried to squeak in Detlas. Unfortunately, they will have to update the signed and seal plans, which will probably delay the final inspection and PTO.
They paired the inverters with the panels/strings:
I think your design is ideal!
I believe the different size inverters were an accident and not worth the hassle of making a big deal out of it, as long as the loads were distributed correctly, which after doing my own calculations I believe they were. If not an accident, maybe just an inventory issue. It could have been worse, they could have tried to squeak in Detlas. Unfortunately, they will have to update the signed and seal plans, which will probably delay the final inspection and PTO.
They paired the inverters with the panels/strings:
- SE-3800H-US (3.8kW) inverter with one 13-panel string (4.42kW), a 1.16 ratio
- SE-11400H-US (11.4kW) inverter with three strings consisting of 10, 12, and 15 panels (12.58 kW), a 1.10 ratio
I am waiting for an install similar to the OP. The drawing for my 17kw system calls for the following:
(1) Solar Edge SE7600H-US (7.6kW) inverter with 26 panels at 340W each
(1) Solar Edge SE7600H-US (7.6kW) inverter with 24 panels at 340W each
All panels are facing east and it should be no problem changing the number of panels per inverter. I do have some tree shading issues so most of the time I will not be getting max sun all day long depending on the season.
Is this the best configuration? I was thinking that it might be better to use the next size up inverter (SE-11400-US) with maybe 28 panels and the (SE7600H-US) with 22 panels. If there is a better configuration I'd like to make the change now while it's still in permitting. Thanks for any ideas.
I think your design is ideal!