Questions about Growatt Hybrid inverter SPH 4000TL3 BH-UP 4kW, 3-phase

Theoretically it is possible, but we advise against it. We expressly recommend using the original Growatt "https://www.galaxus.ch/de/s4/product/growatt-energiespeicher-ark-25h-a1-heimspeicher-37129118" batteries, as otherwise the warranty will be voided and no support can be provided for installation or other issues.