Discover Keltie Campers Ltd

Lithium Battery Upgrades

Campervans • Motorhomes • Horseboxes • Racetrucks

Fogstar • Roamer • Eco Tree – Professionally Installed in Callander, Scotland

At Keltie Campers Ltd, we specialise in professionally installed lithium battery systems, integrated into Victron-based off-grid electrical systems for safe, reliable power.

We are approved installers for Fogstar, Roamer and Eco Tree lithium batteries, supplying correctly designed systems for leisure and specialist vehicles where reliability matters.

Why Upgrade to Lithium Batteries?

Lithium batteries are a major upgrade over traditional lead-acid or AGM batteries, especially for vehicles used off-grid or overnight.

🔋 Usable Power

Lead-acid batteries typically provide around 50% usable capacity

Lithium batteries provide up to 95–100% usable capacity

This means a smaller lithium bank can outperform a much larger lead-acid setup.

⚡ Faster, More Efficient Charging

Lithium batteries:

Accept higher charge currents

Charge efficiently from alternator, solar, and mains

Reach full charge far quicker than lead-acid

Less engine run time, more usable power.

🔁 Long Service Life

Lithium batteries last 3–5× longer than lead-acid

Thousands of charge cycles when installed correctly

Lower lifetime cost despite higher upfront price

🧳 Weight & Space Savings

Lithium batteries are significantly lighter and more compact, making them ideal for:

Campervans

Motorhomes

Horseboxes

Racetrucks and support vehicles

Why Professional Installation Matters

Lithium batteries are not a simple drop-in replacement.

Correct installation requires:

Compatible charging equipment

Controlled alternator charging

Correct fusing and protection

Proper system design

We install lithium batteries as part of a complete Victron-based electrical system, ensuring safe operation, reliability, and manufacturer compliance.

Lithium Battery Myths – Explained

❌ “Lithium batteries aren’t safe”

Myth.

Quality lithium batteries from reputable manufacturers include:

Integrated Battery Management Systems (BMS)

Protection against over-voltage, under-voltage and temperature extremes

Short-circuit protection

When installed correctly, lithium batteries are extremely safe.

❌ “Lithium batteries damage alternators”

Only with poor installation.

Lithium batteries can draw high current, which is why controlled charging is essential.

We use Victron DC-DC charging and system design to:

Protect the vehicle alternator

Regulate charging current

Ensure long-term reliability

Alternator failures are caused by incorrect installs, not lithium itself.

❌ “Insurance companies don’t allow lithium batteries”

Outdated and incorrect.

Most insurers care about:

Professional installation

Reputable battery brands

Correct electrical protection

We install Fogstar, Roamer and Eco Tree lithium batteries in line with manufacturer guidance and best practice, giving peace of mind for insurance purposes.

❌ “Lithium doesn’t work in cold weather”

Misunderstood.

Lithium batteries should not be charged below freezing — which is why:

Quality batteries include low-temperature protection

System design matters

Victron monitoring ensures correct operation

For most UK use, this is not a practical limitation when installed correctly.

Approved Lithium Battery Installers

Fogstar • Roamer • Eco Tree

We are approved installers for:

Fogstar

Roamer

Eco Tree Batteries

We use these manufacturers because they offer:

Proven reliability

Strong warranty support

Compatibility with Victron systems

UK-based support and documentation

Each battery system is:

Sized correctly for your usage

Integrated into a Victron-based electrical system

Fully tested before handover

Vehicles We Install Lithium Systems In

We regularly install lithium systems in:

Campervans

Motorhomes

Horseboxes

Racetrucks and specialist support vehicles

These vehicles demand reliable, high-performance power, often overnight and off-grid — lithium delivers this when installed properly.

Workshop-Based Installation in Callander

All lithium battery installations are completed at our Callander workshop, allowing us to:

Design systems properly

Install cleanly and securely

Test under real load conditions

Deliver consistent, professional results

Customers travel from across Central Scotland, the Highlands and beyond for correctly installed systems.

Is Lithium Right for Your Vehicle?

Lithium isn’t about fitting the biggest battery possible — it’s about designing the right system.

We’ll help you decide:

Whether lithium is suitable

What capacity you actually need

Which brand (Fogstar, Roamer or Eco Tree) is best for your use

How it integrates with solar, alternator and mains charging

Get in Touch

If you’re considering a lithium battery upgrade or want honest advice:

📞 Contact Keltie Campers Ltd

📍 Callander, Scotland

Tell us how you use your vehicle and what you want to power — we’ll design a safe, reliable lithium system built around Victron equipment.

🔧 Keltie Campers Ltd

⚡ Victron-Based Off-Grid Electrical Systems

🔋 Approved Fogstar • Roamer • Eco Tree Lithium Installer