Shortlist lithium batteries by usable energy, continuous current, cold-weather behaviour, mounting and support terms; brand ranking alone cannot establish suitability.
Comparison basis: This guide compares published specifications and installation requirements. We have not documented a hands-on test of this product; calculations are labelled examples, and manufacturer claims are not our measurements.
Choosing the right lithium (LiFePO4) battery is one of the most important decisions in your campervan battery setup. We've compared the most popular options available in the UK market for 2025. If you're still deciding between lithium and lead-acid, see our LiFePO4 vs AGM comparison first. And if a bargain tempts you, read our verdict on buying a second-hand lithium battery before parting with any cash.
What size battery do you need?
Our free calculator recommends the right capacity based on your actual appliance usage. Design your system in 5 minutes.
Our Top Picks for 2025
Best Value: Fogstar Drift 230Ah — £549
The Fogstar Drift 230Ah is our top recommendation for most campervan builds. It offers the best price-per-Ah of any quality LiFePO4 battery in the UK market.
Key specs: 230Ah capacity, 12.8V, built-in 200A BMS, Bluetooth monitoring, 27kg, 3000+ cycle life.
Why we recommend it: At ~£2.39 per Ah, nothing else comes close on value. The built-in Bluetooth lets you monitor state of charge from your phone. The 200A continuous BMS handles even large inverter loads.
Best for Smaller Builds: Fogstar Drift 105Ah — £299
For weekend vans or smaller setups, the 105Ah Drift is perfect. Same quality BMS and Bluetooth as the 230Ah, just in a smaller package.
Key specs: 105Ah capacity, 12.8V, built-in 100A BMS, Bluetooth, 13kg.
Premium Choice: Victron Smart LiFePO4 200Ah — £1,150
If budget isn't a concern, Victron is the gold standard. The Smart LiFePO4 integrates seamlessly with the Victron ecosystem (Cerbo GX, VRM portal) and has an industry-leading BMS.
Key specs: 200Ah capacity, 12.8V, built-in BMS with VE.Bus communication, 42kg, 5000+ cycle life.
Who it's for: Builds where you want full Victron ecosystem integration, or commercial conversions where the Victron name adds resale value.
Budget Option: Varta AGM 100Ah — £179
If lithium is out of budget, the Varta AGM is a solid lead-acid choice. Remember you only get 50% usable capacity (50Ah usable).
See our head-to-head Victron Lithium Smart vs Fogstar Drift: Specs Compared for a detailed comparison, and use our calculator to find the right capacity for your needs.
Check Fogstar sales
Fogstar regularly runs sales and discount codes, especially around Black Friday. Sign up to their newsletter for the best deals on the Drift range.
What Size Do You Need?
Your battery size depends on daily energy consumption. A quick rule of thumb:
- Weekend van: 100-150Ah LiFePO4
- Holiday van: 200-230Ah LiFePO4
- Full-time living: 300-460Ah LiFePO4
See 100Ah vs 200Ah vs 300Ah for detailed sizing guidance.
FAQ
What's the best value lithium battery for a campervan in the UK?
The Fogstar Drift 230Ah at £549 offers the best value per usable Ah in the UK market. It's well-built, has Bluetooth monitoring, and a strong warranty.
Is Victron worth the extra money over Fogstar?
For most DIY builds, no — the Fogstar Drift offers 90% of the quality at 50% of the price. Victron is worth it if you want full ecosystem integration or need the premium brand for commercial resale value.
How many lithium batteries do I need for a campervan?
Most builds need one battery. A single 200-230Ah LiFePO4 provides enough power for typical daily use (800-1500 Wh). For heavy users, two batteries wired in parallel is an option.
Worked planning check
A 2,000W inverter at 90% assumed efficiency and 12V loaded voltage needs about 185A before other loads. A single battery limited to 100A continuous would not pass that scenario even if its energy capacity is large. Reduce the load or design a compatible higher-current bank.
The figures or dimensions in this example are explicit planning assumptions, not a product test or an installation specification. Replace them with your equipment data and actual measurements.
Planning questions
How much energy is in a 100Ah lithium battery?
At nominal 12.8V, the arithmetic is 1,280Wh. Delivered energy is lower after your reserve, losses and operating limitations; it is not a measured capacity result.
Can I mix battery brands or capacities?
Only with explicit manufacturer approval for the complete arrangement. Chemistry, voltage, age, current sharing and BMS behaviour can make a seemingly simple combination unsuitable.
Can lithium batteries charge in freezing weather?
Follow the exact battery’s permitted temperature range and heating conditions. Do not bypass a protective cutoff or infer charge permission from air temperature alone.
Related
- Campervan battery guide
- Second-Hand Lithium Batteries for Campervans: Worth the Risk?
- What Battery Size for an Induction Hob in a Campervan?
- Bluetooth Battery Monitors Compared: Victron vs Fogstar vs Renogy
- Budget Lithium Battery Brands Compared: Eco-Worthy, Enjoybot, Vatrer UK
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Jack Kennedy is a self-builder who has built two vans. He created Roam Wired to simplify conversion planning and share free tools, supported by affiliate links.
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