ENERTEC LIFEPO4 51.2V/5120WH MODULAR BATTERY EXCLUDING WALL/FLOOR MOUNT. HIGH-USAGE RATE OF CAPACITY AND DISCHARGE RATE DOD 90%@3000 CYCLES, 80%@5000 CYCLES. OPTIONAL REMOTE MONITORING AND FIRMWARE UPDATE. PARALLEL CONNECTION FOR UP TO 15PCS. IP43 SPLASH AND DUST PROOF. WARRANTY 5 YEARS @90%DOD OR 10 YEARS WARRANTY @70% DOD.