Caravan Kettle Wattage: Will a 1000W Kettle Trip Your Hook-Up?
A 1,000W kettle will not trip a UK campsite hook-up on its own. It draws about 4.3A, which fits comfortably inside a 16A or 10A supply and even squeezes into a 6A one. What trips the bollard is the kettle plus whatever else was already running, and in winter that is almost always the heater.
Here is the arithmetic, and the reason caravan kettles are rated the way they are.
Kettle wattage against pitch supply
UK hook-ups run at roughly 230V, so amps multiplied by 230 gives you the wattage ceiling:
| Kettle | Rated power | Current at 230V | Fits 6A? | Fits 10A? | Fits 16A? |
|---|---|---|---|---|---|
| Mestic MWC-110 | 800W | 3.5A | Yes | Yes | Yes |
| Mestic MWC-150 | 1,000W | 4.3A | Yes, just | Yes | Yes |
| Typical home kettle | 3,000W | 13.0A | No | No | Only on its own |
The last row is the important one. A domestic kettle at 3,000W draws 13A. On a 16A pitch that leaves 3A for the entire rest of the caravan, including the charger and the fridge. On a 10A pitch it trips immediately. This is the single most common cause of a tripped bollard on a UK site, and it is why bringing the kettle from home does not work.
The two Mestic kettles compared
MWC-110
The MWC-110 is rated 800W with a 1 litre capacity, cordless, 220-240V, weighing 0.8 kg. At 3.5A it is the safest choice for a 6A pitch and the one to pick if you frequently stay on smaller sites or travel in Europe.
MWC-150
The MWC-150 is rated 1,000W with a 1.5 litre capacity, giving around seven cups per boil. It is stainless steel, cordless, 20 x 16 x 22.5 cm, 0.8 kg, with auto power off, boil-dry protection, an indicator light and a 0.75 m cord.
| MWC-110 | MWC-150 | |
|---|---|---|
| Power | 800W | 1,000W |
| Capacity | 1 L | 1.5 L, around 7 cups |
| Material | Plastic body | Stainless steel |
| Auto power off | Yes | Yes |
| Boil-dry protection | Yes | Yes |
| Weight | 0.8 kg | 0.8 kg |
The trade is straightforward: the MWC-110 uses less current, the MWC-150 boils more at once and boils it faster. If you are usually on 16A serviced pitches, take the larger one. If you travel widely or use smaller sites, the 800W model removes a category of problem.
Does lower wattage mean a slow boil?
It takes longer, but not as much longer as the wattage difference suggests, because you are also boiling less water. Roughly, energy needed is proportional to the volume, and time is energy divided by power.
Boiling a single mug's worth in the 800W kettle is not meaningfully slower than in a 3,000W one, because most of the time in a big kettle goes on heating water you did not need. Fill either kettle to the line for the number of cups you actually want and the practical difference is a minute or so.
The habit worth forming is filling to the level you need. It saves time, and on a metered pitch it saves money.
The winter combination problem
This is where the wattage actually bites. From October the heater is running, and it has first claim on your supply.
| Running together | Total | 10A pitch (2,300W) |
|---|---|---|
| Heater 1,500W + kettle 1,000W | 2,500W | Over the limit |
| Heater 1,500W + kettle 800W | 2,300W | At the limit, likely to trip |
| Heater 750W + kettle 1,000W | 1,750W | Comfortable |
| Heater 500W + kettle 1,000W | 1,500W | Comfortable |
The fix is not a smaller kettle, it is a heater you can turn down. The Ceramic Heater MKK-230 has 500W, 1,000W and 1,500W settings for exactly this reason: drop it a level while the kettle boils, then put it back. A heater with a single fixed element gives you no such option.
What about boiling on gas instead?
A stove-top kettle on a gas ring uses no electricity at all, which sidesteps the whole problem and works off-grid. The downsides in winter are that it puts steam into the van and it needs watching. Many people carry both: gas for off-grid, electric for serviced pitches.
What about a 12V kettle?
12V kettles exist, and they sidestep the hook-up entirely, but the physics is unkind. Boiling water takes a fixed amount of energy regardless of the voltage you supply it at. A 12V kettle is typically rated somewhere around 170W to 300W, so it takes far longer to boil, and it pulls a heavy current from your leisure battery while it does.
As a comparison, the 12V Coffee Machine MK-70 is rated 170W and makes six cups from a 0.65 litre pot. That works because it is heating a modest volume slowly and holding it warm, rather than trying to bring 1.5 litres to a rolling boil in three minutes.
The practical arrangement most people settle on is a 230V kettle for hook-up pitches, a gas hob kettle for off-grid, and a 12V appliance for the drive.
Running cost, and why it is not the kettle
A 1,000W kettle boiling for three minutes uses 0.05 kWh. At an example metered rate of 30p per kWh, that is about one and a half pence. Ten boils a day comes to roughly 15p.
Set that against a 1,500W heater running for four hours, which uses 6 kWh, or about 1.80 pounds at the same rate. On a metered pitch the kettle is irrelevant to the bill and the heater is the whole of it. If you want to reduce what you spend on electricity, drop the heater a setting rather than rationing cups of tea.
Descaling and hard water
Caravan kettles scale up faster than domestic ones because they are filled from varied water sources, some of them very hard. Scale on the element makes the kettle slower and noisier and eventually shortens its life.
- Descale every few trips in hard water areas, using a proprietary descaler or a white vinegar solution left to sit, then rinsed thoroughly.
- Empty the kettle before you travel. Water sloshing around in transit is both a mess and a corrosion risk.
- Dry it out before winter storage rather than leaving standing water in it.
- Stainless steel bodies such as the MWC-150 clean up more easily than plastic and do not retain taste.