growatt inverter 6kw 3 phase 48V Batteryokaya battery 160ah pricesodium ion battery12v lithium battery 120ahlifepo4 280ah bluetooth 12vlithium iron phosphate lfp batteriesgrowatt min 3000lithium ferro phosphate cellseve 3v lithium batterylifepo4 battery canadalto battery 12v12 volt lithium battery charger