280ah lifepo4 lithium ion batterydeye sun2000g312v lifepo4 lithium battery cell bmslifepo4 speichermodulbest cheap lifepo4 batterylithium iron phosphate batteries teslalifepo4 cell 150growatt 6000w 51.2V Battery10kwh powerwall batterylifepo4 105ah battery cells280ah lishen lifepo4iec 61727po4life battery