12 Year Warranty
That’s how much we believe in our product. Over a decade of powered adventures.
Unlimited Tech Support
Our UK based team are here to help. Reach out to us any time - by phone, email or live chat
Triple Certified For Safety
Tested, certified and industry verified. Now with ECE R-10 for type approved vehicles.
Five Generations. One Relentless Goal.
SMART5 is the result of years of refinement - each generation tested, improved, and battle-hardened through real-world feedback. From better thermal management to additional third party integrations, every evolution brings you a battery that is stronger, safer, and more intelligent.
> Premium LiFePO4 cells with up to 20 years life
> Ultra reliable 300A BMS for high power systems
> Brand new models - 144SMART5 and 340SMART5
> Plug and Play integration with Victron, Garmin and more
> Fully certified with R10 type approval for motorhomes
Smarter by Design
Drop-In Lithium Power
SMART5 provides genuine drop-in compatibility. No need to replace your entire electrical system or lead-acid chargers.
EASY UPGRADES
Roamer Intelligence
Link your battery with third party inverters and monitoring systems, with the widest range of integrations yet.
INTEGRATIONSUltimate Reliability
Engineered by Roamer for ultimate reliability. In house testing and quality controls ensure every battery works perfectly out of the box.
BUILT TO LAST
Less wondering
More wandering
Know your power with the all-new Roamer SMART App - the ultimate wingman for uninterrupted adventure. It’s easy to use, connects via Bluetooth, allows and lets you track and monitor the status of your battery from the comfort of your van, boat, or home. Real-time feedback at your fingertips.

Europe's Trusted Number ONE
Over the last 6 years Roamer have established themselves as Europe's leading experts in lithium leisure batteries and off-grid electrics. Don't just take our word for it - Roamer are trusted by tens of thousands of professionals and end users.
Unrivalled build quality and reliability is demonstrated by an industry leading warranty return rate of less than 0.1% in the last 12 months.
Every battery purchase also includes Roamercare. Our unique battery support package includes a free setup consultation call and ongoing technical support via phone, email and live chat.
5/5 average rating
Happy adventurers
powered by Roamer
Roamer leads the pack with their product, and when you couple that with their customer service, it amazes me that people buy elsewhere. Honestly, forget Renogy, Fogstar or anyone else (I've used them both before, but never again). If you value domestic experts with can-do, positive attitudes who genuinely want to help you, then look no further, you've found the holy grail of van electrical companies.
Nice when you come across a company who really cares about what they're doing! I've been in touch with them for various bits of advice regarding choice and installation of my Roamer battery, and without fail, everyone has been really friendly and helpful, willing to spend the time regardless of how seemingly trivial the question is.
Having had an A1 buying experience with the guys at Roamer batteries, we were confident to ask for help when needed. Steve spent ages on the phone, patiently going through settings on the charge controller and advising re apps and appliance energy usage. Chris called twice later to make sure we had got the information we needed. If only all companies were as caring and thorough as Roamer Batteries, they are a top class small British business!
First and foremost Roamer batteries “do what they say on the tin”. Having purchased batteries before that did not live up to their amp hour claims, this is a brand you can trust. Setting up an off grid system at home to avoid energy price increases was made a good deal easier by all the help and advice. Roamer are a battery specialist and not a Solar company however I do not think my 4kw off grid system would up and running now if I had not had all the help from the various members of the Roamer team. You can always buy cheaper but I am not sure you will ever get better value for money when it comes to buying top quality batteries.
The team at Roamer are fantastic. Seriously, if you are in the market for this type of product I wouldn't recommend another company. After placing our order, Steve and Chris have been nothing short of brilliant in supporting us on delivery updates, schematic design & support, video calls, install advice... the lot. We are relative novices in this area and ask a lot of questions but the team are always there, exactly what you need from this type of purchase.
We are extremely pleased with the help we got from Steve and the crew at roamer batteries. We needed to upgrade our battery bank and they helped us out. Such a good price for what you get, extraordinary customer service and they really went above and beyond with helping us sort shipping and installing the battery. Would highly recommend!
Been thinking about going lithium in the van and came across these guys who have some pretty sick branding. Spoke to Chris who answered all my questions and said they could design me a full system to suit my needs along with a battery! The fact that they took their time talking things through with me was the clincher, the customer service was great! Friendly and knowledgeable, I can definitely recommend these guys.
Roamer supplied the electrical design for our self build camper which saved us weeks of research and newbie mistakes, I highly recommend to anyone taking on a self build. Roamer also supplied all the electrical equipment (price matched) with telephone support fo the install - great when you have those little recommendations and questions you're not sure about. Big Fan
I was impressed by the degree of interaction offered by the sales team, always keeping me appraised of the order status. They swiftly and effectively answered the technical questions I posed them and offered me links to further information resources. This was all done in the most friendly and unstuffy manner. I would highly recommend dealing with this company, a most refreshing experience.
Steve at Roamer batteries has been very helpful. Being new to 12 volt systems it has been a steep learning curve for myself and Steve has been great at answering my questions when they have arisen before, during and after the install. Thanks again :-)
Fantastic service from start to finish and the post sale backup is second to none. The products are backed by a ten year warranty so if you're thinking of going lithium, go Roamer!
Great company. Excellent value and unbeatable customer service. We finally feel comfortable enough to finish our conversion electrics now!
Roamer in the wild
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