I saw where you commented about building your system with LV6548 and eve 304 batteries. I just built that exact system if your interested. I posted the pictures on show and tell.
Your professionalism is showing and I am sure we are going to have many conversation in a near future
I really like how you got the batteries inside a metal enclosure as you never know what can go wrong with so much of stored energy...
Few questions if you don't mind:
- When compressing the pack, how did you calculate the pressure with those 4 springs? How much force are you using there?
- Whom did you buy those batteries from and were you happy with them?
- Do you run a gas generator or the grid? What do you switch with your transfer switch?
- Any advice on Neutral to Ground bonding in an off grid setup where your generator has to be bonded to ground and the main panel as well, how all of that integrates with the inverter with and without generator running?
As for Solar panels you have to watch out for 2 things (in order of importance) 1. Voc and 2. Impp.
The Voc voltage gets higher the colder it becomes so something that works well in the summer can be over the Voc limit in the winter when the panels become more efficient. I live in Canada and it gets coooold here so I leave a 20 to 25% Voc room below the 250V max of the inverter.
As a hack you could disconnect 1 panel from each string in the winter just to be on the safe side but it has it's issues too. Inverter can be damaged if Voc voltage is to exceed and your panels have Voc of 85.6 V so 2S is unfortunately a maximum.
As for current Impp the manual says 18 Amp max but it was revised unofficially to NO more than 22 as around 25 is when it will quit for good AFAIK...
Since your panels come up to 6Amp 4P setup would potentially take them up to 24 on a sunny day and this is something I wouldn't be comfortable with myself. I have seen Amps being clipped by the inverter at about 17.5 Amps. It would probably sacrifice production anyways but for safety I go with 2S3P x 4 setup for a total of 12 and max 5220 Watts. This is my logic but I could be wrong obviously.
Thanks,
A