Xirsix G1 · 12V-class LTO
G1 12V LTO Battery Module
Lithium titanate. 6C. Built for the cold.
A 12V-class 6S1P lithium titanate (LTO) module with an integrated 5 A active balancer, M12 brushed-aluminum terminals and a PETG enclosure.
- Energy, Conservative Rating
- 500 Wh
- Cycles to ≥ 80%
- 25,000
- Limited Warranty
- 20-year
- Operates Down To
- −40 °C
Specifications
Full Specs.
Electrical
- Configuration
- 6S1PSix LTO cells in series
- Rated Capacity
- 40 AhAt 25 °C, standard discharge
- Energy
- 500 WhConservative rating
- Nominal Voltage
- 13.8 V6 × 2.3 V per cell
- Ideal Operating Range
- 11–15 VBest performance and longevity
- Maximum Voltage
- 17.4 V6 × 2.9 V charge cut-off. Do not exceed.
- Minimum Voltage
- 9.0 V6 × 1.5 V discharge cut-off. Do not go below.
- Continuous Charge / Discharge
- 240 A (6C)Per module design rating. Monitor temperature.
- Peak / Pulse
- ~10C for 10 s
- Internal Resistance
- ≤ ~4–5 mΩApproximate, module
- Balancing
- 5 A active capacitiveIntegrated; equalizes cells automatically
- Built-In Protection
- None, by design (no traditional BMS)A BMS's switches and shunts would add resistance and cap current. Use external fusing and stay within 9.0–17.4 V.
Life
- Cycle Life
- ~25,000 cyclesTo ≥ 80% capacity, standard test conditions
- Calendar Life
- Up to 25 yearsWith proper care (SOC, temperature, minimal abuse)
Charging
- Compatible Chargers
- Standard 12 V lead-acid or Li-ionMay not reach full 17.4 V; normal and safe
- Recommended Charge Voltage
- ~14.4–15.0 VAvoid constant high-voltage float
- Alternators
- Standard 12 V automotiveFully compatible
Environment
- Operating Temperature
- −40 to +65 °CCell spec; ≤ 1C below 0 °C; cool above 35–40 °C
- Water Resistance
- Water-resistant, not waterproofSplash and light rain; no submersion or pressure washing
- Enclosure Temperature
- ~60–70 °C continuousPETG softens near 75–85 °C
Mechanical
- Dimensions
- 10 × 6.5 × 9 in~254 × 165 × 229 mm (DERIVED)
- Weight
- 22 lb (~10.0 kg)
- Enclosure
- PETG housingImpact- and chemical-resistant, serviceable. White sleeve, black caps and base.
- Terminals
- M12 × 1.75 posts, brushed aluminumNord-Lock washers and automotive post adapters included
- Terminal Torque
- 10 Nm maxDo not exceed; use a calibrated torque wrench
Shipping and warranty
- Shipping Class
- UN3480, Class 9Lithium-ion batteries; ground shipping
- Warranty
- 20-year limitedRepair or replace; see warranty for terms
Important
There’s no traditional BMS, by design. A BMS puts MOSFET switches and current shunts in the main current path, which adds resistance and caps the current, so we leave it out to keep the full high-current capability of the cells. The integrated 5 A active balancer still keeps the cells matched.
That makes protection your system’s job: use properly sized cable and external fusing, keep the module between 9.0 V and 17.4 V at all times, and never short the terminals. Max terminal torque 10 Nm.