Hey all!

Im in start of installing a Deye Inverter (its like Sunsynk). Im from Ukraine, and we had bunch of problems this winter due to war so i will need to be backed up better.

So my install will be following:

Deye Sun-12K-SG04LP3 (3 phase 12kwt)

Batteries 2x 8s3p Lithium NMC(VW electro car blocks) paired as 16S with Daly BMS (thus i will have them running on 60 volts (80% charge) with no danger of overcharge (i just dont want to tear off the car blocks and cut it to 14S, just let it be. Blocks are 6.85kwt x2 =14 kwt i will have like 10Kwt by not fully charging them which suits me on the price i will get it) And have such builds twice is 20Kwt of stored in battery power.

Also planning a 5-10 kWt PV, which will work in summertime, winters are dark and expect only 10% of summer production.

Have several questions on my installation guys:

1) Max voltage Deye can run the battery is 60 volts or i can somehow adjust more? a bit maybe 61 or 62 would be ideal

2)I dont have like a green tariff so i will not able to sell excess PV electricity to the grid. Well i can send it but it will not affect any of my bills. Am i right if i set invertor to sell the excess production and if i have any device runing that is not connected to the Load or Aux load it will firstly "catch" that electricity and if i dont have any running it will just flow to the grid?

Why asking because i will not hook up all my house on inverter cos i have some powerful loads (pool pump 7kwt, water heater 3kwt-21kwt) if they run not connected to inverter will i have some juice on them?

3) I also have a PowMR 6.2kWt from aliexpress inverter laying which i planned to install firstly but got deep in to the topic and figured out that what i need is Deye. Well i can sell it, or use it with another 3rd battery and here is questions of how to do it on AUX port

Gen input method (i will have my PowMR inverter hoocked up to gen Input with a set up load like 3-4Kwt and Deye will call it when needed to feed the batteries up

Microinverter input (Same thing)

Other method Forget Deye connection and use PowMr with a battery just for my server rack with all the Pumps and thermostats i have for a long long time running that (500W/h load) 24h work time offgrid.

On this setup if i have 2 hybrid inverters hooked up in one house supplying different loads that wont cross. Invertors not connected to each other by any sync cable (powmr doesnt support that) will i have any crash boom bang in any case (grid off, grid on, electricity being sold to grid (question #2 is still a question)

Sorry for beeing noob, im in a early begining.

Edited March 23, 20232 yr by Denveronly