Motorhomes
House battery power for lighting, appliances and compatible inverter loads.
GROUP 31 RV LITHIUM BATTERY
12V LiFePO4 Power for Extended RV Runtime
Compare TUORDE 12.8V 100Ah and 120Ah Group 31 configurations for RV house-battery upgrades. Review nominal energy, the illustrated 330 × 172 × 216 mm enclosure, charging requirements and model-specific Smart BMS options before selecting your battery.
For RV manufacturers, battery distributors and private-label brands.
| Specification | 100Ah Configuration | 120Ah Configuration |
|---|---|---|
| Battery chemistry | LiFePO4 | LiFePO4 |
| Nominal voltage | 12.8V | 12.8V |
| Rated capacity | 100Ah | 120Ah |
| Nominal energy (calculated) | 1,280Wh | 1,536Wh |
| Dimensions (L × W × H) | 330 × 172 × 216 mm | 330 × 172 × 216 mm |
Nominal energy = nominal voltage × rated capacity; these calculations are not measured usable energy. Dimensions follow the supplied 100Ah and 120Ah battery illustrations. Confirm the final model drawing, terminal clearance, weight, current ratings and charging limits before ordering. Review Battery Datasheets & Technical Resources, then request the approved Group 31 drawing for your selected capacity.
01 / DEEP CYCLE HOUSE POWER
Choose 1,280Wh or 1,536Wh of nominal energy; usable energy and runtime depend on the battery configuration and loads.
Compare model-specific weight at an equivalent rated capacity; confirm tray loading and mounting requirements.
Cell monitoring, temperature protection and communication options.
Designed for repeated RV charging and discharging.
100Ah / 120Ah configurations
The 120Ah configuration adds 256Wh (20%) of nominal energy over 100Ah in the illustrated housing. Confirm current ratings separately; extra Ah does not guarantee higher inverter output.
Need more storage? Compare RV Lithium Battery Solutions and confirm the housing before selecting a higher-capacity model.
02 / CHEMISTRY COMPARISON
| Feature | Lead Acid Group 31 | LiFePO4 Group 31 |
|---|---|---|
| Voltage | 12V nominal | 12.8V nominal |
| Usable Capacity | Usable energy depends on discharge depth and load | Higher usable energy at a comparable rated capacity |
| Cycle Life | Varies by battery type, discharge depth and maintenance | Model-specific cycle rating; compare at the same test conditions |
| Weight | Generally heavier at a comparable rated capacity | Generally lighter at a comparable rated capacity |
| Maintenance | Flooded batteries require watering; AGM batteries do not | No electrolyte watering; inspect connections and system settings |
Compare specific model datasheets. Runtime and cycle life depend on discharge depth, temperature, charging and the load profile; a group-size label does not define battery performance.
03 / THE INSTALLATION ENVELOPE
A 12V Group 31 lithium battery must fit the tray and the surrounding installation, including its terminals and cable connections. Measure the available space before choosing a replacement.
Use the RV Lithium Battery Compatibility Guide to review battery fit alongside charger, inverter and system requirements. Compare Group 24, Group 27 and Group 31 Lithium Battery Sizes. For alternative battery enclosure sizes, explore our Group 24 Lithium Battery and Group 27 Lithium Battery guides.
04 / CONNECTED BATTERY OPTIONS
Select BMS protection and communication for your Group 31 build. Optional AI functions include runtime prediction, abnormal drain alerts, battery health insights and guided troubleshooting, subject to the selected hardware, firmware and app.
View battery status through a compatible app.
Exchange battery data with supported RV equipment.
Connect compatible controllers and system interfaces.
Review operating data and battery condition indicators.
Estimate available operating time as loads and conditions change.
Smart BMS & AI RV Battery Technology
Bluetooth, CAN, RS485, health insights and runtime estimation are configuration-dependent. Confirm protocols, firmware and connected equipment before integration. Guided diagnostics identify abnormal conditions and support troubleshooting; they do not perform physical battery repair.
05 / SELECT BY YOUR RV LOADS
House battery power for lighting, appliances and compatible inverter loads.
Deep cycle storage for campsite power and solar-supported operation.
A practical format for installations with a suitable battery tray and service access.
Energy storage selected around daily consumption, charging sources and autonomy.
06 / A PLANNED REPLACEMENT
A Group 31 RV battery replacement begins with the existing house battery footprint and finishes with a verified lithium charging setup. The installation below describes the checks for a typical upgrade; the actual configuration remains vehicle-specific.
Review RV Lead Acid To Lithium Battery Replacement for the charging and protection checks that accompany the change in battery chemistry.
07 / GROUP 31 QUESTIONS
A Group 31 lithium battery is a LiFePO4 battery designed around the physical format commonly used by Group 31 batteries. Group size describes fit, while capacity, current rating and charging requirements depend on the specific model.
A compatible 12V LiFePO4 battery with the right dimensions and terminal arrangement can replace a Group 31 house battery. TUORDE offers 100Ah and 120Ah Group 31 configurations; higher-capacity options must be checked against available installation space.
Many RV house battery systems can be upgraded after checking physical fit, voltage, charger settings, inverter loads, wiring and fuse protection. A lithium battery should not be treated as an automatic drop-in replacement for every installation.
Group 31 does not specify a single amp-hour capacity. TUORDE Group 31 options include 100Ah and 120Ah configurations. Select capacity using daily energy consumption and required runtime, then verify the model dimensions and BMS current limits.
A properly selected Group 31 LiFePO4 battery can provide deep cycle house power for RV lighting, appliances and compatible inverter systems. Available energy, current capability, mounting and charging conditions should match the application.
Yes, when the solar charge controller supports the selected battery’s LiFePO4 charging profile, voltage settings and current limits. Confirm low-temperature charging protection and the combined current from all charging sources.
They need compatible charging settings. An existing charger may be suitable if its voltage, current and charging modes meet the battery specifications. Lead-acid equalization and desulfation modes must be disabled; alternator charging may require a DC-DC charger.
Selected TUORDE Group 31 configurations support Bluetooth monitoring and CAN or RS485 communication options. Protocols, firmware, app functions and connected equipment compatibility must be confirmed for each battery configuration.
SPECIFY YOUR GROUP 31 UPGRADE
Choose TUORDE Group 31 LiFePO4 batteries for RV upgrades, deep cycle applications and intelligent energy systems.
Specify 100Ah or 120Ah, battery tray dimensions, terminal orientation, daily energy demand, continuous and surge loads, and charging equipment for a configuration review. For custom battery configurations, branding and integration requirements, explore our RV Battery OEM & Private Label Solutions.