1. Iron Phosphate-lithium power battery 2. Long warranty period: 1years 3. Higher energy density,smaller volumn for household. 4. Support Connected in parallel mode for expansion. 5. Photovoltaic system:this battery pack is designed for household photovoltaic systems. Usable Capacity: 3.75kWh Charge Voltage 28.8V MAX. Charge & Discharge Current 120A MAX. Output Power 3000W Modules Connection 1-9 in parallel Net Weight(kg) 51kg Product Dimension(MM) 438*525*244mm