Growatt SPA 3000 1-phase is a battery inverter. It is an AC coupled inverter so you can connect the battery to the AC side!
It is the ideal solution considering the battery inverter perfectly matches the solar panels, battery and grid.
The Growatt SPA 3000 1-phase contains a DC and AC output of 3000wp and you can connect Low Voltage batteries to it. Where you would normally feed your excess power generated back to the grid, it goes straight into the battery. It weighs only 17KG. It can take a battery with a voltage of 42-59Volt and 2-12kWh.
It has no fan or transformer making it whisper quiet!
Growatt inverters come with a standard 10-year warranty.
Datasheet