1. Iron Phosphate-lithium Battery Powerwall ： More than 6000 cycle times 2. Higher energy density,smaller volume for household.Long 3. warranty period：3 years~10years 4. Support Connected in parallel mode for expansion 5. Photovoltaic system：this battery pack is designed for household photovoltaic systems. 6. Expand ability： this battery pack can be easily expanded by adding expansion battery packs in parallel conne 7. Battery management system(BMS)：the battery packs built-in BMS monitors its operation and prevents the battery from operating outside design limitations.