The Haisic 4kWh 12V (approx. 300Ah–314Ah) LiFePO4 lithium battery is a high-capacity, compact energy storage unit widely used for home solar backups. It is often sold standalone or as an all-in-one system paired with a 1.5kVA hybrid inverter. Key SpecificationsCapacity: 4,038Wh (12.8V nominal, ~314Ah)Lifespan: Up to 10,000 cycles / 10 to 15 yearsProtection: Intelligent Battery Management System (BMS)Warranty: Generally 3 to 5 years depending on the vendorCompatibility: Works well with 12V inverters (1kVA to 2.5kVA) to power TVs, lights, fans, and small fridges