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Why LiFePO4 for vans
Compared with lead-acid (AGM, gel, flooded), lithium iron phosphate batteries let you use most of their rated capacity, hold voltage steadily, accept charge quickly and last many more cycles. Battle Born, for example, lists 3,000–5,000 cycles for its 100 Ah model and says it offers up to 75 % less weight than lead-acid for the same usable energy.
Electrical safety. 12 V systems carry high currents that can start fires; mains (120/230 V) wiring can kill. Fuse every positive cable at its source, size cables to the manufacturer's tables, and have your system designed or checked by a qualified auto-electrician. Mains wiring should be done by a qualified electrician.
The six things to check on a data sheet
- Usable capacity (Ah and Wh). Wh = Ah × nominal voltage (12.8 V for LiFePO4).
- Continuous and peak discharge current. This limits the inverter you can run.
- BMS protections. Over-charge, over-discharge, over-current, short-circuit and temperature.
- Low-temperature charging. Protection or self-heating if you'll be in sub-zero conditions.
- Form factor. Under-seat spaces in many vans are tight – check dimensions and terminal position.
- Certifications and warranty. Look for recognised safety certifications and a written warranty from a company that answers emails.
A reference model
Battle Born 100Ah 12V LiFePO4
Best for: Builders in North America who value a US-assembled battery and a known support line.
- Chemistry
- LiFePO4
- Capacity
- 100 Ah at 12 V
- Cycle life (manufacturer)
- 3,000–5,000 cycles
- Form factor
- Group 27 / 31 drop-in
- Cold-weather option
- Heated version available
- Continuous / surge current not listed on the product page – check the data sheet
- Cold-climate users should look at the heated variant
Specs: manufacturer page, checked 2026-11-14. Based on manufacturer specs and public reviews – not a hands-on test.
We list only what the manufacturer publishes. Other well-known LiFePO4 brands for vans include Victron, Renogy, LiTime, Fogstar (UK) and Liontron (DE); compare their data sheets using the six checks above. We'll add verified spec cards as affiliate programmes are confirmed.
How big should your bank be?
Use the van electrical system calculator: it converts your appliances into daily watt-hours and suggests a battery size with a reserve. Then make sure your DC-DC charger and solar can refill it.
Installation basics
- Secure the battery against crash forces – a 12 kg battery becomes a projectile in an accident.
- Fit a correctly rated main fuse as close to the positive terminal as possible.
- Use a battery monitor (shunt) for an accurate state of charge.
- Reprogram every charger for a lithium profile.
Frequently asked questions
How many amp-hours do I need in a van?
Add up your daily consumption in watt-hours (fridge, fan, lights, devices), then size the battery so you can cover at least one or two days without charging. Our electrical calculator does the maths.
Can LiFePO4 batteries be charged below freezing?
Standard LiFePO4 cells should not be charged below 0 °C. Look for a BMS with low-temperature charge protection, or a self-heated battery if you travel in winter.
Are cheap LiFePO4 batteries safe?
LiFePO4 is the most stable common lithium chemistry, but quality varies: cell grade, BMS design and internal connections matter. Prefer brands that publish full data sheets, certifications and a clear warranty.
Can I mix a lithium battery with my old lead-acid?
Not in the same bank. Different chemistries need different charge profiles. Replace the whole house bank and reconfigure chargers for lithium.
Spotted an outdated spec? Tell us.