1. : A grade full new quality prismatic . with original QR codes ,never use second hand . ( brand: REPT,GANFENG ,LISHEN ,GOTION). With 10-15 years typical lifespan.2. Protection : Each battery built-in BMS â Battery Management System.3. Communication port : RS485/RS232/CAN,4. Compatible : All hybrid and off grid inverter (Except Huawei, all inverters on the market can be make compatible by our engineer. only need to provide the inverter communication protocol)5. Warranty : 10 years. For long term cooperation customer, we can up to 15 years.6. Maintenance free & Low self discharge & Fast & efficient charging.7. Free cables + paper version user manual.