One of critical issue with an AC coupling system is happening when battery has fully discharged.
There is no way to recover back.
So, I decide to install an addtional DC coupling
Two panasonic HIT340 module on the shed at my back yard.
2 pannels are connected in series, it can generate 680W. (practically, it can generate 760~780W).
I have installed cheap MPPT charger,
Actually, this model can support 190V input, and working up to 160V.
When I make 2s 96cell module, Voc is around 130-140V. and Vmppt is around 120V.
It is too hard to use a generic 150V charger.
but, this MPPT controller is perfect in my case.
This is final connection,
I have installed 200W 48V to 12V DC2DC for Mini-computer (monitoring), NAS (Data storage & Web Server)
and Wireless Router (to keep on an in-house network).
I have installed 30kWh battery power
The useable capacity is around 24~25kWh. and, It is enough to supply 24 hours full power usage.
or 2-3 days limited power usage at my house.