Help with string(s) sizing 6000xp

[jcollinsks]

I got a kit without panels from ss, my plan is to expand to at least one more 6000xp in the future so I went with a pallet of these

14.2kW Pallet - Hyperion 395W Bifacial Solar Panel (Black) | Up to 495W with Bifacial Gain | Full Pallet (36) - 12.2kW Total

Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL

signaturesolar.com

I’m a bit confused on the 480 VOC max, in terms of what’s best string sizes especially with their data sheet not including much about the bifacial side.

I was thinking 8s2p but I’m second guessing myself.

Also the docs says it can have more amps but not more voc and optimal voc is 385. With the two moots is it a max of 480voc total or on each also?

 

[sunshine_eggo]

480Voc per MPPT

17A max usable input current. Those panels are 12.7-13.0, so 2P on a single MPPT means you can't use most of the second string.

22A max Isc. 2P on a single MPPT exceeds that.

Bifacial has no impact on Voc or Vmp. It may affect Isc and Imp.

If you want to max out the one inverter you have, 10S on each MPPT should be fine unless it gets below -40°C/-40°F.

Once you get the second inverter, 9S on each MPPT to use all 36 panels.