wpns
Solar Joules are catch and release
There are a lot of inverters and panels out there, and I'm trying to nail down some details.
I have an SMA inverter and except for some fiddly little engineering details, I'm pretty happy with it, and open to using SMA for my expansion, so I'm looking at the Sunny Boy 7.7-US, which has three MPPT inputs rated for 600V peak, 270-480V MPP range, and 10A input current per MPPT (18A max short circuit).
I can fit two strings of 9 of the JA Solar JAM54S31 395W panels on my roof, which are rated Voc 36.98V, Vmp 30.84V, Imp of 12.81 A, and Isc 13.71A (at STP), which will give me a Voc of 332V, Vmp 277V, so that should work, but Imp is too high for the inverter input.
Can I tie both strings to the 3 MPPT inputs in parallel and use all (25.62A) of the panel current, or is the panel current too high to put one string on each input (and leave the other MPPT input empty)?
Does that make sense? Do I need to pick panels with an Imp less than 10A and have individual strings? Are there higher-voltage, lower-current panels that I should select?
Thanks!
I have an SMA inverter and except for some fiddly little engineering details, I'm pretty happy with it, and open to using SMA for my expansion, so I'm looking at the Sunny Boy 7.7-US, which has three MPPT inputs rated for 600V peak, 270-480V MPP range, and 10A input current per MPPT (18A max short circuit).
I can fit two strings of 9 of the JA Solar JAM54S31 395W panels on my roof, which are rated Voc 36.98V, Vmp 30.84V, Imp of 12.81 A, and Isc 13.71A (at STP), which will give me a Voc of 332V, Vmp 277V, so that should work, but Imp is too high for the inverter input.
Can I tie both strings to the 3 MPPT inputs in parallel and use all (25.62A) of the panel current, or is the panel current too high to put one string on each input (and leave the other MPPT input empty)?
Does that make sense? Do I need to pick panels with an Imp less than 10A and have individual strings? Are there higher-voltage, lower-current panels that I should select?
Thanks!