Complete Victron motorhome electrics from £6,595 all-in for Compact, or £8,495 for Flagship Gasless. We do the whole motorhome electrical installation in our Cumbria workshop, or you can pick just one upgrade: lithium, solar or MultiPlus-II.
Of that, about £2,895 (Compact) or £3,594 (Flagship Gasless) is labour.
Three complete Victron systems. One all-in price each.
A neat, simple Victron system for lighter power needs.
Cook on induction, run the coffee machine, microwave and air fryer. No gas on board.
Victron MultiPlus-II and Cerbo GX, supplied and fitted
Single upgrades and services, on their own or alongside a full system. Each one is a fixed price.
Not the cheapest install. Built so you only pay once.
We design it, supply the kit, fit it, test it and give you the certificate. One price, no separate labour bill, and nobody passing you between firms.
Cables sized to BS 7671, terminations crimped and labelled, RCBO protection and a full test before handover. It's the part that's easiest to skimp on, so we don't.
Charlie Cable, our Lead Electrician, is a gold card electrician and heads up our Witherslack workshop.
We'd rather book you in a little later than rush your build. Each system gets the time it needs, from design to handover.
Approved Fogstar installer Read Fogstar's case study
It all starts with a free 30-minute call.
Most motorhomes leave the factory with a small lead-acid battery and a basic charger. We upgrade motorhome electrics to lithium, solar and Victron, supplied and fitted in our workshop, with one all-in price. Open any item to see what goes in and why.
For 3000 VA systems we fit the Victron MultiPlus-II inverter/charger. Run an induction hob, microwave or air fryer from the motorhome battery, charge from hook-up, and let it switch over automatically. Lighter builds use a 1200 VA MultiPlus.
We fit Fogstar Drift lithium as the standard motorhome battery, typically 300Ah on Compact and about 628Ah on Flagship. It's lighter than lead-acid, and that matters for payload. Victron batteries on request.
Every MultiPlus install includes an AC-in consumer unit, so your motorhome electric hook up is isolated and RCD-protected before the inverter/charger. It's in the price, not an extra.
The worry we hear most from owners is simple: is my earthing right, and would the RCD actually trip? Once an inverter/charger is added to a motorhome, the protective conductors, chassis bond and neutral-to-earth link must all be right, or the RCD may not protect you.
"The dealer fitted an inverter, but nobody could tell me if the RCD still works on it." We get that message far too often.
What we do on every motorhome
Motorhomes carry more people, more kit and often more years of wiring than a van. So we start with what is already there, then size the new system around how you tour.
Most motorhomes have a habitation control panel, a mains charger and years of add-ons. We check what is worth keeping and what isn't safe, then build the new system around it.
Lithium weighs far less than the lead-acid it replaces, so we can add capacity without eating into your payload. On 3.5 tonne builds we still weigh every choice up with you.
If you cook on induction or run a microwave, the battery and inverter have to match. That is why Flagship Gasless pairs a 3 kVA MultiPlus-II with about 628Ah of Fogstar lithium.
Solar gives very little from November to February. For year-round touring we lean on DC-DC charging from the engine and on hook-up at sites.
Compare campervan electrics, see our systems for cabin and glamping builders, or read our guides.
Yes. Every project starts with a free 30-minute call with Tom. No obligation.
Yes. Tiny Build Electrics Ltd is an Authorised Victron Energy Installer, listed on Victron's own where-to-buy finder at our Witherslack workshop.
Yes. We design each upgrade so it fits the full system later, so nothing gets thrown away.
Complete motorhome systems start from £6,595 for Compact and £8,495 for Flagship Gasless, all-in. Labour makes up about £2,895 and £3,594 of that. A Victron MultiPlus-II with Cerbo GX added to your existing system is £2,750 all-in. We price every system to your build.
It depends on how you travel. Lights, fridge and charging use little. Induction cooking, a microwave or a hairdryer use a lot, which is why our Flagship pairs a 3kVA MultiPlus-II with about 628Ah of Fogstar lithium and as much solar as the roof takes.
Not if the system is sized well. Plenty of our customers stay off grid for days on solar and lithium. When you do plug in, the AC-in consumer unit protects the supply and the MultiPlus-II charges the motorhome battery.
Yes. Our add-ons include a solar fit with a Victron SmartSolar charge controller and a lithium and DC-DC upgrade, each priced all-in.
Yes, but usually only a 12V habitation battery, a hook-up inlet and a basic mains charger. That runs lights and the water pump, not 230V appliances off grid. Lithium, solar and a MultiPlus-II change that.
We plan the layout first, then fit the battery, charging and inverter/charger close together on short, heavy cables. Every circuit is fused, labelled and tested, and you get a certificate to BS 7671 for the 230V side.
Yes. Since 19 October 2026 you can ask DVLA to review a refused application, or reapply because its policy has changed. A review only looks at the evidence you sent before, so new photos mean a new application. Our DVLA guide covers both.
An electrical installation certificate to BS 7671 and your test results. DVLA doesn't ask for one with a body type application, but if you sell, it's up to you to show the conversion was done safely. Your Victron settings and firmware are visible in the VictronConnect app and VRM, and we check them at handover.
It can. Since 19 October 2026, DVLA's checklist lists a high-top or pop-top roof alongside side windows and a habitation door. DVLA still decides each application on the photos you send. Our DVLA guide explains what changed.
We're now booking installs from February 2027. Booking starts with a free call with Tom. Once your quote is agreed, a £500 deposit secures your install slot, and we confirm your fitting date, drop-off and collection in writing. The balance is due before your motorhome leaves the workshop.
We do installs at our Witherslack workshop. Local on-site work is available on request, subject to review.
Book a free 30-minute call with Tom and get a clear price.
