The heart of your off-grid adventure:
Campervan & motorhome lithium battery installation & upgrades
Lithium battery upgrades from £450
Unlock the true potential of your campervan or motorhome. We design and install high-performance LiFePO4 leisure battery and charging systems. Expert lithium battery installers serving all Somerset.
Tired of your old lead-acid battery holding you back?
Your traditional lead-acid or AGM leisure battery is the weak link in your campervan. It's incredibly heavy, charges painfully slowly, and you can only safely use about half of its advertised capacity.
Does this sound familiar?
- You have to run your engine for hours just to get a decent charge.
- Your diesel heater cuts out overnight because the battery voltage drops too low.
- You're constantly checking a voltage meter, worried about damaging your batteries by draining them too much.
- You dream of running a coffee machine or an induction hob, but your current system just can't handle it.
You've built a van for freedom, but you're tethered by an outdated power source.
Upgrade to a modern, complete power system
The solution is a complete system upgrade, centred around a powerful, lightweight Lithium Iron Phosphate (LiFePO4) battery. This is the new standard for serious campervan, motorhome and caravan setups, offering a revolutionary leap in performance.
We offer a range of Victron SmartLi and Fogstar LiFePO4 batteries from 100Ah to 300Ah, each featuring an integrated Battery Management System (BMS) that protects against over-charge, over-discharge, and temperature extremes. A lithium upgrade delivers up to 10x the cycle life of lead-acid, 3x faster charging, and 50% less weight — freeing up payload space while giving you more usable power.
But a powerful battery is only half the story. To unlock its full potential, it needs to be charged correctly. At Quantock Van Tech, we specialise in designing and installing complete power systems, pairing your new lithium battery with the right components, like a Battery-to-Battery (B2B) charger and correctly configured solar controller. We also recommend a Victron SmartSolar MPPT controller to maximise solar harvest into your lithium battery. As experienced lithium battery installers, we ensure everything is perfectly integrated.
From our base in Williton, we help campervan, motorhome and caravan owners across Somerset build robust power systems that are safe, efficient, and ready for any adventure. Whether you need a LiFePO4 battery upgrade or a full system design, we're your local experts. Own a caravan? See our caravan lithium battery upgrade page.
The lithium advantage: more power, less worry — professional battery installation & upgrades
More usable power
- A 100Ah lithium battery gives you nearly double the usable power of a 100Ah lead-acid battery. You can use almost all of its capacity without fear of damage. One of the best lithium battery upgrades you can make for your van.
Incredibly fast charging
- Lithium batteries can accept a much higher charge current. With a B2B charger, you can recharge a significant amount of power in just a short drive.
Massive weight saving
- LiFePO4 batteries are typically less than half the weight of their lead-acid equivalents. It's an instant and significant payload increase for your van.
Longer lifespan
- A well-maintained lithium battery can last up to 10 times longer than a lead-acid battery, offering far better long-term value for your investment.
Stable power supply
- Lithium provides a consistent, high voltage right until it's empty. This means your appliances (especially diesel heaters) run more reliably without cutting out.
A complete system approach
- We don't just sell batteries. We install a fully integrated system. A B2B charger is essential for protecting your vehicle's alternator and charging your new battery effectively and safely.
Our 5-step campervan lithium battery upgrade
A tailored approach to your van's new electrical heart — from first chat to fully commissioned.
Power audit & consultation
We work through what you run, how long you stay off-grid, and where the batteries live in your van — under a seat, in a cupboard, behind a panel. The result is a tailored capacity recommendation, never a one-size-fits-all box.
System design & quote
We design the full upgrade: the right LiFePO4 battery, a properly sized B2B charger for your alternator, plus any cable, fuse, or shunt changes needed. You receive a clear quote within 48 hours, with itemised costs and a parts lead time.
Book the install
Your deposit covers the battery and major components, secures stock, and pins down your install date. Most campervan battery upgrades are scheduled within 2–4 weeks of booking.
Professional installation
We remove and responsibly dispose of your old batteries, then fit the new lithium pack into the existing space (or relocate it for a cleaner install). The B2B charger is wired to the alternator, fuses are upgraded, and the system is bench-tested before commissioning — usually a 1–3 day job at our Williton workshop.
Configuration & handover
We configure the charger and any monitoring app to the battery manufacturer's spec, then walk you through your new power system. You leave with full documentation, our 12-month installation warranty, and ongoing support for the life of the system.
Ready for a real power upgrade?
Transform your campervan or motorhome with a power system that won't let you down. Expert lithium battery installers near me in Somerset — contact us today.