Questions

In most 12V-class systems, yes. Nominal voltage is 13.8 V with an ideal operating range of 11-15 V. For a single-battery vehicle or boat, swap it in place of the existing battery. In multi-battery systems (golf carts, RVs, off-grid and solar banks), don't mix Xirsix modules with other battery types: replace the whole bank. There's no traditional BMS by design (it would limit current), so fuse it and keep it between 9.0 V and 17.4 V.

No. Standard 12 V lead-acid and lithium-ion chargers, and standard 12 V automotive alternators, are compatible. A standard charger may not take the module all the way to 17.4 V, which is normal and safe. For best results use a charger that reaches about 14.4-15.0 V, and avoid constant high-voltage float.

The module is rated for 6C (240 A) continuous charge and discharge, so at full rate a charge from empty takes on the order of 10 minutes. In practice the charger sets the pace: most lead-acid chargers supply far less current than the module can accept.

Repair or replacement for qualifying failures under normal use for twenty years from the original purchase date, including capacity below 80% of the rated 40 Ah under standard test conditions. Normal LTO aging and high-cycle fade aren't defects. Claims go through support@xirsix.com. The warranty document has the full terms.

Lithium titanate is known for exceptional resistance to thermal runaway, and there's no acid to spill. Like any high-energy battery it can still deliver dangerous current: never short the terminals, use appropriate fusing and cabling, and follow the voltage and temperature limits.

It's a deliberate design choice. A traditional 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. Protection comes from your system instead, just as with the lead-acid battery it replaces: use properly sized cable and external fusing, and keep the module between 9.0 V and 17.4 V.

Keep it cool and inside its voltage window. Performance and life are best near 25 C; above 35-40 C, add cooling or reduce load, and below 0 C keep charge and discharge at or under 1C. Daily operation between 11 and 15 V is ideal.

No. The PETG enclosure is water-resistant (splash and light rain) but not waterproof. Don't submerge it, pressure wash it, or mount it where water pools.

10 Nm maximum. Use a calibrated torque wrench: under-torqued terminals can loosen under vibration and heat up, and over-torquing can strip threads. Nord-Lock washers and automotive post adapters are included.