400Ah Large Capacity RV Lithium Battery with 3000+ Cycle Life and IP67 Waterproof for RVs and Camping

12V 400Ah LiFePO4 RV Battery, rated energy 5.12kWh, specially designed for RVs, campers and off-grid energy storage. It replaces traditional lead-acid batteries with lighter weight, longer service life, deeper discharge and zero maintenance.

• ✅ 400Ah Large Capacity: Meets the all-day power demand of RV air conditioners, refrigerators, lighting and audio-visual equipment.
• ✅ 3000+ Cycle Life (70% DOD): 5-8 times that of lead-acid batteries, more cost-effective in the long run.
• ✅ Built-in Intelligent BMS Protection System: Overcharge, over-discharge, over-current, short-circuit, high-temperature and low-temperature protection, safe and stable. 
• ✅ Bluetooth APP Monitoring (Optional): Real-time monitoring of voltage, current, SOC, temperature and alarms.
• ✅ Low-Temperature Heating (Optional): Charging available at -20℃, worry-free for RVs in winter. 
• ✅ Lightweight 43.5kg: Only 1/3 of the weight of lead-acid batteries with the same capacity, reducing RV load.

1. RV/Camper Main Power Supply: All-day operation of air conditioners, refrigerators, microwave ovens, lighting, audio-visual equipment and water pumps.
2. Off-grid Photovoltaic Energy Storage: Matching with solar panels, self-sufficient, usable without grid power.
3. Yacht/Marine Power Supply: Marine air conditioners, navigation equipment, lighting and household appliances. 
4. Outdoor Work/Mobile Studio: Power supply for RV modification, photography, live streaming and medical equipment.
5. Backup Power/Emergency Energy Storage: Home backup, power outage emergency and outdoor camping. 

• Q: Can it directly replace the original lead-acid battery?
• A: Yes, 12.8V is compatible with 12V systems, with adaptive size and consistent positive and negative poles, plug and play; it is recommended to check if the charger supports LiFePO4 (14.4V-14.6V). 
• Q: Does it support parallel expansion with multiple batteries?
• A: Yes, it can be paralleled with up to 4 batteries, with a total capacity of 1600Ah, meeting the demand for large loads. 
• Q: Can it be used in low temperatures in winter? 
• A: The standard version can be charged above 0℃; the optional low-temperature heating version can be normally charged and discharged at -20℃, suitable for RVs in northern winter. 
• Q: How long is the service life and warranty period? 
• A: 3000+ cycles (70% DOD), usable for 8-10 years under normal use; 5-year warranty (free of charge for non-human damage). 
• Q: Is maintenance required?
• A: Zero maintenance, no need for water replenishment, balancing or regular charging, low self-discharge rate, and slow power loss during long-term storage. 
• Q: Is it safe? Will it explode?
• A: It adopts LiFePO4 (lithium iron phosphate), which has stable chemical properties, non-flammable and non-explosive; built-in BMS multiple protection and flame-retardant shell, safe and reliable for RV use.