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12V 120Ah LiFePO4 Group 31 Deep Cycle Lithium Battery
12V 120Ah LiFePO4 Group 31 Deep Cycle Lithium Battery
Enerwatt EWLI-12V120 12V 120Ah LiFePO4 Group 31 Deep Cycle Battery
The Enerwatt EWLI-12V120 12V 120Ah LiFePO4 Battery is a high-capacity Group 31 lithium deep cycle battery designed for dependable power in RVs, boats, solar energy systems, off-grid cabins, camper vans, trailers, camping setups, and auxiliary 12V power applications. Built with advanced LiFePO4 lithium iron phosphate chemistry, this battery delivers long cycle life, stable voltage, efficient energy storage, and reduced weight compared to many traditional lead-acid or AGM deep cycle batteries.
With a nominal voltage of 12.8V, a capacity of 120Ah, and an energy rating of 1,536Wh, the EWLI-12V120 is ideal for users who need more stored energy in a rugged, practical Group 31 format. Its 150A maximum constant discharge current and 125A maximum charging current make it a strong option for properly sized RV, marine, solar, inverter, and off-grid systems.
Why Choose the Enerwatt EWLI-12V120?
- 12.8V 120Ah LiFePO4 battery with 1,536Wh of stored energy
- Group 31 case size for RV, marine, solar, trailer, and off-grid installations
- 150A maximum constant discharge current for demanding deep cycle applications
- 125A maximum charging current with a recommended charging current of 30A
- LiFePO4 lithium iron phosphate chemistry for stable, long-lasting power
- 4000 expected cycles at 80% depth of discharge under specified test conditions
- 15-year design life expectancy under proper operating conditions
- Integrated BMS protection for voltage, current, temperature, short circuit, and cell balancing
- Lightweight lithium design at approximately 15 kg
- 96-month warranty for long-term confidence
Ideal Applications
The Enerwatt 12V 120Ah lithium battery is built for deep cycle power systems that need reliable capacity, strong discharge performance, and long service life. It is well suited for:
- RV house battery upgrades
- Travel trailers, fifth wheels, and camper vans
- Marine electronics and boat accessory power
- Compatible 12V trolling motor applications
- Solar battery banks and renewable energy storage
- Off-grid cabins and remote power systems
- Camping, overlanding, and portable 12V power setups
- Backup power and auxiliary energy storage
- Inverter-supported 12V power systems when properly sized
Built for RV, Marine, Solar & Off-Grid Power
The EWLI-12V120 is a practical lithium upgrade for many compatible Group 31 deep cycle battery systems. For RV and camper use, it can support properly sized 12V loads such as lighting, fans, water pumps, refrigerators, control panels, furnace fans, and inverter systems. For marine applications, it can provide dependable power for onboard electronics, fish finders, lighting, accessories, and compatible trolling motor systems.
For solar and off-grid applications, the 1,536Wh energy capacity makes this battery a strong choice for storing renewable power in cabins, trailers, mobile work setups, and remote power systems. Its LiFePO4 chemistry helps deliver stable voltage and efficient usable capacity over repeated charge and discharge cycles.
High-Capacity Lithium Performance
Compared to traditional lead-acid batteries, LiFePO4 batteries can provide improved usable capacity, longer cycle life, lower maintenance, and more stable voltage output when used with a compatible charging system. The Enerwatt EWLI-12V120 is designed for deep cycle applications where long-term reliability and efficient energy storage are important.
With an expected cycle life of 4000 cycles at 80% depth of discharge and a design life expectancy of up to 15 years under specified conditions, this battery is built for users who want a long-lasting power solution for recreational, marine, solar, and off-grid systems.
Integrated Battery Management System
The built-in Battery Management System provides complete battery management and protection. It monitors voltage, current, temperature, and cell balance to help protect the battery during charging, discharging, storage, and everyday operation.
- Cell voltage protection
- Module voltage protection
- Over-current charge protection
- Over-current discharge protection
- Temperature warning and protection
- Short-circuit protection
- PCB temperature protection
- Passive cell balancing
- State of charge monitoring
- Low-power sleep mode to reduce energy consumption during storage
Product Specifications
| Brand | Enerwatt |
| Model / SKU | EWLI-12V120 |
| Internal Part Number | 10-121-20017 |
| Product Type | Deep Cycle Battery |
| Battery Chemistry | LiFePO4 / Lithium Iron Phosphate |
| Battery Group Size | Group 31 |
| Nominal Voltage | 12.8V |
| Capacity | 120Ah |
| Energy Rating | 1,536Wh |
| Charging Voltage | 14.0V – 14.4V |
| Float Voltage | 13.5V |
| Discharge Cut-Off Voltage | 9.6V |
| Recommended Charging Current | 30A |
| Maximum Charging Current | 125A |
| Maximum Constant Discharge Current | 150A |
| Discharge Rate | 1.25C |
| Cycle Life | 4000 cycles at 80% DOD, 0.5C |
| Design Life Expectancy | 15 years |
| Bluetooth Monitoring | No — Bluetooth is available on the EWLI-12V120BH model only |
| Integrated Heating | No — integrated heating is available on the EWLI-12V120BH model only |
| BMS | Integrated Battery Management System |
| Charging Temperature Range | 0°C to 50°C |
| Discharging Temperature Range | -20°C to 50°C |
| Storage Temperature Range | -20°C to 50°C |
| Dimensions | Approx. 330 x 171 x 220 mm / 13.0 x 6.7 x 8.7 in |
| Weight | Approx. 15 kg |
| Colour | Black |
| Warranty | 96 months |
Charging & Compatibility Notes
This battery is designed for deep cycle applications. For best performance and battery life, use a LiFePO4-compatible charger, RV converter, inverter charger, or solar charge controller with the correct lithium charging profile. The recommended charging voltage range is 14.0V to 14.4V, with a recommended charging current of 30A.
Always confirm compatibility with your RV, marine, solar, trolling motor, inverter, charger, or electrical system before installation. This battery should not be used as an engine starting battery unless the application has been confirmed compatible by the manufacturer or a qualified installer.
Best Fit For
- Customers replacing compatible Group 31 deep cycle batteries
- RV owners wanting a higher-capacity lithium house battery
- Boat owners needing reliable power for electronics and accessories
- Solar users building a compact 12V energy storage system
- Campers and overlanders needing dependable portable power
- Off-grid users needing long cycle life and strong discharge capability
Frequently Asked Questions
What is the Enerwatt EWLI-12V120 battery used for?
The Enerwatt EWLI-12V120 is a 12V 120Ah LiFePO4 deep cycle battery designed for RVs, boats, camper vans, travel trailers, solar systems, off-grid cabins, camping power setups, and auxiliary 12V energy storage. It is ideal for applications that require reliable deep cycle power, high usable capacity, and long battery life.
How many watt-hours does the EWLI-12V120 battery provide?
The EWLI-12V120 provides 1,536Wh of energy, based on its 12.8V nominal voltage and 120Ah capacity. Actual usable energy may vary depending on load, temperature, system design, and operating conditions.
Does the Enerwatt EWLI-12V120 battery have Bluetooth?
No. The EWLI-12V120 does not include Bluetooth monitoring. Bluetooth is available on the EWLI-12V120BH model only.
Is the Enerwatt EWLI-12V120 battery heated?
No. This EWLI-12V120 model does not include integrated heating. Integrated heated charging support is available on the EWLI-12V120BH model only.
Can this battery replace a lead-acid or AGM Group 31 battery?
In many compatible deep cycle applications, yes. The EWLI-12V120 can be used as a lithium upgrade for many Group 31 lead-acid or AGM battery systems. However, the charging system should be compatible with LiFePO4 batteries. A lithium-compatible charger, RV converter, inverter charger, or solar charge controller is recommended for best performance.
Can I use the EWLI-12V120 battery for an RV?
Yes. This 12V 120Ah LiFePO4 battery is a strong option for RV house power, travel trailers, fifth wheels, camper vans, and camping setups. It can support properly sized 12V accessories such as lights, fans, water pumps, refrigerators, control systems, and inverter systems.
Can this battery be used for marine applications?
Yes. The Enerwatt EWLI-12V120 can be used for marine deep cycle applications such as boat electronics, fish finders, lighting, accessory circuits, and compatible 12V trolling motor systems. It should not be used as a starting battery unless the application has been confirmed compatible.
What is the cycle life of this 12V 120Ah LiFePO4 battery?
The expected cycle life is 4000 cycles at 80% depth of discharge and 0.5C under specified test conditions. This makes it a long-lasting alternative to traditional lead-acid deep cycle batteries.
What charger should I use with this battery?
A LiFePO4-compatible charger is recommended. The charging voltage range is 14.0V to 14.4V, with a recommended charging current of 30A and a maximum charging current of 125A.
What is the maximum discharge current?
The EWLI-12V120 supports a maximum constant discharge current of 150A, making it suitable for properly sized deep cycle power systems that require higher current output.
