Growatt SPH-3000~6000 + EV Charging

[mjdyson]

Hello,

I'm looking to develop a script that allows me to turn off house battery discharge when an electric vehicle is connected to the house. We have 6kW of solar generation capacity, so I'm not expecting a full charge every day. The Zappi 2 charger I have lined up has the capability of switching on EV charging when export to the grid is > 1.4kW (also this would infer that the house battery is full).

Ideally I'd like surplus solar to be delivered to the car, if this is achievable with my gear. +/- 10% would still make some difference as our export rates are <30% of the import rates. The last thing I want is to cycle the house batteries unnecessarily.

What kind of strategies should I be thinking about?
Can I get the system to stop discharging the house battery, if the solar levels drop?
I will presume that the Zappi 2 has a CT clamp on the grid side that detects when export is high and that it can switch quickly enough to maintain a small amount of export.

My growatt system has priority modes batt, grid and load-first and seem to be controllable via server.growatt.com. I'm not sure what effect each mode would have on what I'm trying to do.

Any help here would be greatly appreciated


Cheers,
M

 

[2muschi]

Hello,

I'm looking to develop a script that allows me to turn off house battery discharge when an electric vehicle is connected to the house. We have 6kW of solar generation capacity, so I'm not expecting a full charge every day. The Zappi 2 charger I have lined up has the capability of switching on EV charging when export to the grid is > 1.4kW (also this would infer that the house battery is full).

Ideally I'd like surplus solar to be delivered to the car, if this is achievable with my gear. +/- 10% would still make some difference as our export rates are <30% of the import rates. The last thing I want is to cycle the house batteries unnecessarily.

What kind of strategies should I be thinking about?
Can I get the system to stop discharging the house battery, if the solar levels drop?
I will presume that the Zappi 2 has a CT clamp on the grid side that detects when export is high and that it can switch quickly enough to maintain a small amount of export.

My growatt system has priority modes batt, grid and load-first and seem to be controllable via server.growatt.com. I'm not sure what effect each mode would have on what I'm trying to do.

Any help here would be greatly appreciated


Cheers,
M

Maybe take a look at Groboost.
Into the documentation have seen something about pairing with a EV charge station.
Also it automaticaly adjust the load to not import from grid.