Portable Air Conditioner
Portable Air Conditioner
Most UK homes have no airflow and no insulation worth speaking of. But if you have solar panels or a portable battery, you are better placed than most people realise.
The average portable air conditioner pulls between 900W and 1,500W. At current grid rates, that adds up fast. Check the current Met Office forecast — if a heatwave is coming, now is the time to get your setup sorted. On a clear summer day, a modest solar setup generates more than enough power to run one for significantly less than grid rate. And if you have a home battery or a portable power station, you can run it after dark on energy you stored during the day, or charged overnight on a cheap off-peak tariff like Octopus Go.
This guide covers everything in one place. How to choose the right unit, how much power it actually uses, how to size your solar or battery setup to match it, and which units give you the best results if keeping running costs low matters to you.
What this guide covers
- Refrigeration vs evaporative cooling: what actually works in the UK
- Full comparison chart: 14 portable AC units, budget to premium
- How many solar panels do you need to run an air con unit
- Running your AC from a battery: three ways to do it
- Pick your perfect air con: take the quiz
- Top picks by budget with product cards
- Evaporative coolers: worth it or not
If You Want to Cool a Room: Good, Better, Best
Prices correct at time of publication. Gemshore Power uses affiliate links and may earn a commission on qualifying purchases at no extra cost to you.
Refrigeration vs Evaporative: What Actually Works in the UK
Walk into any electrical retailer right now and you will see two very different types of product both being sold as air conditioning. They are not the same thing. One actually cools the air. The other blows air over water and hopes for the best.
Refrigeration AC
Uses a compressor and refrigerant to actively remove heat from the air. The same technology in your fridge. Works regardless of humidity.
- Drops room temperature by 8 to 12 degrees
- Works in UK humidity
- Needs a hose to vent hot air out
- Draws 900W to 1,500W
- Starts from around £240
Evaporative Cooler
Blows air over a wet pad or water tank. Adds moisture to the air. Works in hot dry climates. In a humid UK summer, results are minimal.
- Drops temperature by 2 to 4 degrees at best
- Less effective as humidity rises
- No hose needed
- Draws as little as 5W to 110W
- Starts from around £35
Evaporative coolers do have a place though. They are cheap to run, draw almost no power, and work well as personal coolers at a desk or bedside. We cover the best options at the end of this guide.
These Will Move the Air and Cool It Down - Just Keep the Water Cold
Not a replacement for a refrigeration unit in a UK heatwave. But at this price and this power draw, a good evaporative cooler at your desk or beside your bed makes a real difference. The trick is simple: fill the tank with cold water and add ice if you have it. The colder the water, the harder it works.
Prices correct at time of publication. Gemshore Power uses affiliate links and may earn a commission on qualifying purchases at no extra cost to you.
Full Comparison Chart: Portable AC Units Budget to Premium
All true refrigeration units. Ordered by price low to high. Wattage is the single most important figure if you are running from solar or battery — the lower it is, the longer your power lasts.
| Product | BTU | Wattage | Room Size | Noise | Hose | SEER | Price | Link |
|---|---|---|---|---|---|---|---|---|
| SereneLife 7000 BTU | 7,000 | 230W* | 32.5m² | 57dB | Single | 20 | £240.85 | Buy |
| SereneLife 7000 BTU with Remote | 7,000 | 230W* | 32.5m² | 57dB | Single | 20 | £249.99 | Buy |
| SereneLife 12000 BTU Self Evap | 12,000 | 1,450W | 47m² | 57dB | Single | 16 | £329.99 | Buy |
| SereneLife 14000 BTU | 14,000 | 230W* | 60m² | 57dB | Single | 15 | £359.99 | Buy |
| SereneLife 12000 BTU Dual Hose Inverter Inverter | 12,000 | 902W | n/a | 55dB | Dual | n/a | £512.99 | Buy |
| Belaco 9000 BTU | 9,000 | 950W | n/a | 65dB | Single | 14.5 | £799.99 | Buy |
| ZAFRO 16000 BTU Inverter Inverter | 16,000 | 1,310W | 74m² | 42dB | Dual | n/a | £1,127.55 | Buy |
| ZAFRO 14000 BTU Inverter Inverter | 14,000 | 1,250W | 65m² | 42dB | Dual | n/a | £1,141.78 | Buy |
| Inverter 16000 BTU Inverter | 16,000 | 1,300W | 79m² | 42dB | Dual | 12 | £1,145.44 | Buy |
| Gasbye 14000 BTU DC Inverter Inverter | 14,000 | 1,290W | 46m² | 45dB | Dual | 13.6 | £1,189.62 | Buy |
| Humhold 14000 BTU Inverter Inverter | 14,000 | 1,250W | 65m² | 42dB | Dual | n/a | £1,195.53 | Buy |
| ZAFRO 14000 BTU Premium Inverter | 14,000 | 1,250W | 65m² | 43dB | Dual | n/a | £1,452.92 | Buy |
* 230W wattage figures for SereneLife units are as stated by the manufacturer. Verify on the Amazon listing before sizing solar or battery against these units. All other wattage figures are manufacturer stated and may vary under load.
How Many Solar Panels Do You Need to Run a Portable AC Unit?
The rule is simple. Your solar panels need to generate at least as many watts as your AC unit consumes. If your panels produce more than the unit draws, the excess charges your battery. If they produce less, you are drawing the difference from the battery. The sun that is making you hot is also your power source. On a clear UK summer day, that works very much in your favour.
Best approach: charge a 2,000Wh+ battery overnight on Octopus Go, run the AC from that during the day. Top up with whatever solar you have.
This is the solar sweet spot. Four 250W panels or two 500W panels runs this unit all day with power to spare for battery charging.
A 4,000Wh battery topped up by 800W of solar covers 11am to 6pm comfortably on a clear day. Quietest unit in the range at 42dB.
How Long Will a Battery Run Your AC — With and Without Solar?
No solar panels yet? A portable power station still makes a big difference. Charge it overnight on a cheap tariff, run your AC from it during the hottest part of the day. Add solar later and the same unit runs your air con for free. All figures below are based on a 902W mid-range AC unit running at full load.
| Model | Capacity | Price | Standalone | + 200W solar | + 400W solar | + 800W solar |
|---|---|---|---|---|---|---|
| Explorer 1000 v2 | 1,070Wh | £419 | 1.0hr | 1.3hrs | 1.8hrs | 1.8hrs |
| Explorer 1000 Plus | 1,264Wh | £599 | 1.2hrs | 1.5hrs | 2.1hrs | 2.1hrs |
| Explorer 2000 v2 | 2,042Wh | £869 | 1.9hrs | 2.5hrs | 3.5hrs | 17.0hrs |
| Explorer 3000 v2 | 3,072Wh | £1,599 | 2.9hrs | 3.7hrs | 5.2hrs | 25.6hrs |
| Model | Capacity | Price | Standalone | + 200W solar | + 400W solar | + 800W solar |
|---|---|---|---|---|---|---|
| Elite 100 V2 | 1,024Wh | £399 | 1.0hr | 1.2hrs | 1.7hrs | 8.5hrs |
| Elite 200 V2 | 2,073Wh | £899 | 2.0hrs | 2.5hrs | 3.5hrs | 17.3hrs |
| Elite 300 2026 | 3,014Wh | £1,399 | 2.8hrs | 3.6hrs | 5.1hrs | 25.1hrs |
| Apex 300 | 2,764Wh | £1,699 | 2.6hrs | 3.3hrs | 4.7hrs | 23.0hrs |
All runtime figures based on 902W mid-range AC unit at full load. 85% inverter efficiency applied. Solar figures assume clear UK summer day with 5 peak sun hours. Actual results will vary.
Top Picks by Budget
All true refrigeration units. Every one will genuinely cool a room. The solar pill on each card tells you how many panels you need to run it continuously.
* 230W wattage figures for SereneLife units are as stated by the manufacturer. Verify on the Amazon listing before sizing solar against these units. Prices correct at time of publication. Gemshore Power uses affiliate links and may earn a commission on qualifying purchases at no extra cost to you.
Frequently Asked Questions
How long will a portable power station run an AC unit without solar?
Why does 800W of solar make such a big difference to AC runtime?
Why can't I just compare AC units by their BTU rating?
Can an evaporative cooler run entirely on solar?
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