Keeping a caravan or motorhome warm without tripping the hook-up comes down to wattage. Here’s how to choose a low-wattage or 12V heater that heats the space without overloading a campsite pitch.
Know your power budget
Most UK hook-ups supply 10A (about 2,300W) or 16A (about 3,680W) — and that’s shared with your fridge, kettle and chargers. A fan heater at full blast eats most of it, so look for models with 500W, 750W and 1,000W settings you can dial down.
The main types
Fan heaters warm a space fast but can be thirsty; oil-filled radiators give a gentle background heat; ceramic heaters are compact and efficient; and low-watt tube heaters are ideal for keeping the chill (and damp) off a van in storage. 12V heaters run off the battery for off-grid use but output is modest — think demisting, not toasting.
Safety first
Choose heaters with tip-over and overheat cut-outs, always keep ventilation, and fit a carbon-monoxide alarm if you’re running anything gas. Never leave a heater unattended overnight in a sealed space.
Frost protection in storage
A low-wattage tube heater left on in a stored van keeps the interior above freezing and helps hold damp at bay — cheap insurance against frost damage.
Pair it with a dehumidifier
Warmth and moisture control go hand in hand: a heater plus a dehumidifier keeps the van both warm and dry, which is exactly what stops condensation and mould.
Match the heater’s wattage to your hook-up and you’ll stay warm all winter without a single tripped breaker.
Shop heating & power
Low-wattage heaters and the power kit to run them.