growatt spf 5000 price 51.2V Battery24v 280ah lifepo4eve 280ah 3.2 v lifepo4 prismatic batteries shenzhen basenказаряжатаккумулятоlifepo4 12vn stock 200ah 230ah 280ah energy storagelifepo4 dealslifepo4 100ah celllip04 batterygrowatt inverter sph 6000 51.2V Batterylifepo4 320ah batterielifepo4дл�электровелосипедаlifepo cells for electric vehicle