Which is the best campervan inverters (uk 2026) in the UK? Victron MultiPlus 12V inverter-charger (230V) — Best inverter-charger
An inverter turns your van's 12-volt battery power into 230-volt mains so you can run laptops, chargers, small kitchen appliances and power tools. A quality pure sine wave inverter or inverter-charger costs from a couple of hundred pounds to well over £1,000 for a large Victron MultiPlus. It's also the part of a van electrical system that carries the most current, so mistakes can be dangerous. Bob's 32 years on the tools include plenty of melted terminals from undersized cables, and this guide focuses on choosing the right size and installing it safely. Recommendations are based on published specifications and installation principles, not our own testing of each unit.
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Quick answer — which inverter?
For a full off-grid system with mains hook-up, the Victron MultiPlus inverter-charger is the reference choice: it inverts, charges the batteries from shore power and can switch automatically between the two. For a simpler, standalone inverter, the Victron Phoenix range is a reliable choice in sizes from small to around 1,200VA and beyond. Renogy's pure sine wave inverters offer a lower-cost option for occasional use. Make sure you buy a 230V UK/EU model — some listings are American 120V versions.
Pure sine wave vs modified sine wave
Pure sine wave inverters produce power like the mains supply. Modified sine wave units are cheaper but can make some chargers, motors and electronics run hot, buzz or fail. For a campervan, buy pure sine wave.
Sizing — watts and battery current
Add up what you'll run at once, then allow a margin for start-up surges. A 1,000W load on a 12V system draws roughly 90–100 amps from the battery once losses are included. A 2,000W load draws close to 200 amps, which needs very heavy cables and a battery capable of supplying it. That's why many vans use a modest inverter for chargers and laptops rather than trying to run a kettle or hair dryer. If you need big loads regularly, a 24V system or a mains hook-up is often more sensible.
Cables, fuses and distance
Keep the inverter close to the battery so the heavy DC cables are short. Use cable sized for the full current, fit a correctly rated fuse near the battery, and use proper crimped lugs. Loose or undersized connections create heat. Follow the manufacturer's installation manual exactly.
Earthing and RCD protection
A 230V system in a vehicle needs correct earthing and residual current protection. Some inverter-chargers can provide this, but the installation still has to be designed properly. If you're adding mains sockets to a van, have the 230V side installed or checked by a qualified electrician.
Inverter-charger vs separate inverter
An inverter-charger combines a mains battery charger and inverter. When plugged into a campsite hook-up it charges the batteries and passes mains through to your sockets; when unplugged it switches to the battery. Some models can boost a weak campsite supply using battery power. It's more expensive and complex, but neater for a full conversion.
Battery choice matters
Large inverters need a battery that can deliver high current. Lithium batteries handle this far better than lead-acid, but their BMS current limit must be higher than the inverter's maximum draw. Check that before buying a large inverter.
Typical loads and what they draw
A laptop charger draws around 60–100W, a phone charger 10–25W, a camera battery charger 20–40W, an induction hob 1,200–2,000W, a hair dryer 1,000–2,000W and a microwave around 1,000–1,500W from the supply. Kettles, heaters and cooking appliances quickly drain a 12V battery bank because the battery current is so high. Many van owners use a smaller inverter for electronics and gas or hook-up for heating and cooking. Plan your inverter around the loads you'll really use, not the biggest appliance you might occasionally want.
Idle consumption
Inverters use power even when nothing is plugged in. Some draw several watts, others much more. Over a full day that can waste a noticeable amount of battery capacity. Turn the inverter off when you don't need it, or choose one with a power-saving mode. Victron units, for example, offer search modes that reduce standby use when there's no load.
Mounting and ventilation
Mount the inverter securely on a non-flammable surface where it can get cool air. Don't bury it under bedding, clothes or in a sealed cupboard. Inverters produce heat under load, and poor ventilation can cause shutdowns or reduce lifespan. Keep it dry and away from fuel, gas lockers and water spray.
Using hook-up and generator power
When using campsite hook-up, the supply is often limited, sometimes to 6–10 amps. An inverter-charger with input current limiting can stop you tripping the bollard. If using a generator, check it produces stable power suitable for the inverter-charger. Some cheap open-frame generators can cause problems with sensitive equipment.
When to call in a professional
If you're designing a full conversion with an inverter, mains hook-up, solar and lithium batteries, have the system designed and checked by someone experienced. The electrical system affects safety, insurance and resale value. A neat, labelled installation with proper documentation is worth having.
Choosing between brands
Premium inverters tend to offer cleaner output, lower idle draw, better surge handling and stronger support. Budget units can be fine for light use, but check reviews for reliability and whether the UK version has proper sockets and safety approvals. Whatever you buy, keep the manual and installation details with the van, because a future buyer, insurer or electrician may ask how the system was installed and protected.
Top picks
- Victron MultiPlus 12V inverter-charger (230V) — Best inverter-charger
- Victron Phoenix 12V pure sine wave inverter — Best standalone inverter
- Renogy 12V pure sine wave inverter — Lower-cost option
FAQs
What size inverter do I need?
Add up the loads you'll run at the same time and add a margin. For laptops, phones and camera chargers, a few hundred watts is plenty.
Can I run a kettle from a 12V inverter?
Only with a large inverter, heavy cabling and a big lithium battery, and it will drain the battery quickly. Gas or hook-up is usually better.
Is an inverter-charger worth it?
For vans that regularly use campsite hook-ups, yes. It's neater and can manage charging and switchover automatically.
Can I fit it myself?
Only if you're competent with high-current DC wiring. The 230V side should be installed or checked by a qualified electrician.
Why does my inverter cut out when I switch something on?
Usually the start-up surge is too high, the battery voltage dips under load because of thin cables or a weak battery, or the battery BMS limit is lower than the inverter draw.
Do I need a separate battery charger if I buy an inverter-charger?
No, an inverter-charger includes a mains charger. Check its charging profile suits your battery type, especially lithium.