growatt 12kw off grid inverter compatible LiFePO4 Batteryvictron lifepo4 batteryinversor growatt mic 3000 tlx 51.2V Batterylanlee lithium battery chargerdiy lifepo4 batteryused lifepo4 batteriescatl 280ah lifepo4 grade aтестеlifepo4lithium ion polymer celllifepo4 ladegerät 12v testrevolt lithium ion batterylithium battery charger 48v