The Lion Energy UT 3500 HTR is a high-capacity 12V lithium iron phosphate battery built for auxiliary power, RV energy systems, solar storage, off-grid battery banks, cabins, and backup power applications. With 280Ah / 3,584Wh capacity and a 12.8V nominal rating, it provides substantial stored energy in a single-battery footprint. The UT 3500 HTR uses LiFePO4 battery chemistry for long cycle life and deep-cycle energy storage performance. Built-in Bluetooth® monitoring allows users to check battery status from a compatible device, while the integrated heater supports cold-weather charging conditions. This battery is designed for properly configured auxiliary power systems and should not be treated as a general-purpose starter battery.
The UT 3500 HTR provides 280Ah / 3,584Wh of energy storage for supported RV, solar, off-grid, cabin, and backup power systems. Its higher capacity helps reduce the need for multiple smaller batteries when a properly sized single-battery setup is preferred.
The integrated heater helps support battery charging in colder environments when the system is configured correctly. This makes the UT 3500 HTR a practical option for users who need lithium battery storage in seasonal, mobile, or off-grid applications where temperatures may drop.
Bluetooth® monitoring allows users to check battery status, charge level, and system information from a compatible mobile device. This helps simplify visibility for RV systems, solar battery banks, and auxiliary power setups.
The UT 3500 HTR supports 150A continuous discharge and 280A peak discharge for up to 50 seconds. It also includes a 10.5V low-voltage safety shutoff and LED indicators that show remaining charge level from 10% to 100%.
The Lion Energy UT 3500 HTR is built for users who need more stored energy from a 12V lithium battery system. Its 280Ah capacity, Bluetooth® monitoring, and heated battery design make it a strong fit for properly configured RV, solar, cabin, and off-grid power setups.
This heated LiFePO4 battery should be matched with compatible charging equipment, wiring, fusing, and system design. Confirm your application requirements before using it in an RV, solar battery bank, auxiliary power system, or backup energy setup.
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Contact Us for a Quote| Brand | Lion Energy |
| Model | UT 3500 HTR / UT 3500 BT-H |
| SKU / Item Number | 50170186 |
| Product Type | 12V Heated LiFePO4 Auxiliary Battery |
| Battery Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Nominal Voltage | 12.8V |
| Battery Capacity | 280Ah / 3,584Wh |
| Continuous Discharge | 150A continuous output |
| Peak Discharge | 280A peak discharge for up to 50 seconds |
| Low-Voltage Safety Shutoff | 10.5V |
| Built-In Heater | Included for cold-weather charging support |
| Bluetooth® Monitoring | Monitor battery status from a compatible mobile device or web app |
| LED Indicators | Shows battery level from 10% to 100% |
| Dimensions | 13.85" × 7.64" × 12.85" |
| Weight | 72.31 lbs. |
