What is the best camping power supply in the UK?

When searching for the best camping power supply UK, the ideal solution depends entirely on whether you have access to a mains hookup or are completely off-grid. For off-grid wild camping and festivals, a 20,000mAh to 30,000mAh portable power bank is the top choice. Conversely, for family campsites, a certified mobile mains unit is essential. Picture the scene: you are standing in a field in Somerset, the sun is finally breaking through the clouds, and your favourite band is about to take the Pyramid Stage. You reach into your pocket to capture the moment, only to be greeted by the dreaded black screen of a dead battery. It is a rite of passage for many British festival-goers, but it certainly doesn't have to be.

Based on our extensive testing here at ProsteNet UK, finding a reliable off-grid power source is no longer just a luxury; it is a critical necessity for navigation, photography, and safety. Whether you are navigating the sprawling campsites of Glastonbury, wild camping in the Peak District, or settling in for a family weekend in Cornwall, keeping your devices juiced up requires a solid strategy.

In this guide, we will break down the best commercial options to keep your tech running. Furthermore, if you are looking for heavy-duty solutions for campervans or extended glamping trips, you may also want to read our comprehensive 2024 guide to the best portable power stations in the UK. However, for those pitching a tent and carrying their gear on their backs, read on to find your perfect portable power solution.

Can you use a normal plug in a tent? (Campsite Hookups vs Wild Camping)

Before investing in a power solution, you need to understand the environment you will be sleeping in. The UK camping scene generally splits into two distinct categories when it comes to electricity: commercial mains hookups and off-grid wild camping. Crucially, you cannot simply run a standard household extension lead into a damp field.

Campsite Electric Hookups (EHU)

Many commercial campsites in the UK offer an Electric Hookup (EHU). These are easily identifiable by the blue 16-amp commando sockets on the pitch bollards. However, to create a safe tent power supply UK, you are legally required鈥攁ccording to UK BS 7671 wiring regulations鈥攖o use a specific mobile mains unit. These purpose-built units feature a built-in Residual Current Device (RCD) and Miniature Circuit Breakers (MCB) to protect you from fatal electric shocks in damp outdoor conditions.

Festivals and Wild Camping

On the other hand, if you are heading to Download, Reading, or wild camping in the Scottish Highlands, EHUs are completely out of the question. You are entirely off-grid. Moreover, petrol generators are strictly banned at almost all UK festivals due to fire risks and noise pollution. Therefore, your only viable commercial option is a portable battery solution. A high-quality camping battery pack acts as your lifeline to the outside world.

What size power bank do I need for a 3-day festival?

When selecting a power bank for Glastonbury or any multi-day event, capacity, weight, and durability are your primary commercial concerns. Power bank capacity is measured in milliampere-hours (mAh). Based on our field tests, here is how the top options stack up for UK festival-goers:

1. The Weekend Warrior (10,000mAh - 20,000mAh)

For a standard Friday-to-Sunday festival, a 20,000mAh power bank is the absolute gold standard. It is compact enough to fit comfortably in a bum bag or daypack, yet holds enough juice to get a modern smartphone through the weekend. To ensure your power bank is fully charged before you leave the house in record time, we highly recommend pairing it with one of the best GaN fast chargers in the UK.

2. The Heavy-Duty Brick (26,800mAh - 30,000mAh)

If you are camping from Wednesday to Monday, or acting as the designated charging hub for your mates, you will undoubtedly need a larger capacity. A 26,800mAh battery pack is usually the maximum size you can legally take on a commercial flight (sitting just under the 100Wh CAA limit), making it an incredibly versatile choice for both UK festivals and holidays abroad.

3. Solar Power Banks

Can you genuinely rely on the sun in the UK? Occasionally. Power banks with built-in solar panels can provide a helpful trickle charge to top up your battery during the day. While a small solar panel won't charge a 20,000mAh battery from flat in a single British afternoon, leaving it clipped to the outside of your tent or backpack can provide that vital emergency 10% charge. Check out our roundup of the best solar power banks UK for our top tested picks under 拢100.

How many phone charges will a 20000mAh power bank give?

It is incredibly easy to look at a 20,000mAh battery and assume that if your phone has a 4,000mAh battery, you will get exactly five full charges. Unfortunately, real-world battery mathematics is not quite that straightforward.

The 80% Efficiency Rule: Power is inherently lost through heat generation and voltage conversion (power banks store energy at 3.7V but output at 5V via USB). As a general rule of thumb, multiply your power bank's stated capacity by 0.8 to find its actual usable capacity.

Consequently, a 20,000mAh power bank yields roughly 16,000mAh of usable energy. Here is exactly what that looks like in practical terms based on our charging tests:

• iPhone 15 / Samsung Galaxy S23: Approximately 4 to 5 full charges.
• GoPro / Action Camera: Approximately 8 to 10 full charges.
• DJI Mini 4 Pro Drone Battery: Approximately 3 to 4 full charges.

Festival Drain Warning: According to Ofcom data, the average UK adult spends over 3 hours a day on their smartphone. However, at a festival, your battery will drain up to 40% faster than normal. Why? Because in a field with 100,000 other people, your phone is constantly struggling to find a stable 4G/5G signal from overloaded temporary cell masts. Therefore, our tech experts highly recommend turning your phone to "Low Power Mode" and switching off background app refresh the moment you pitch your tent.

Are camping power banks waterproof? (Handling the British Weather)

It simply wouldn't be a British camping trip without a bit of rain. When choosing a commercial camping power supply, you must pay close attention to its Ingress Protection (IP) rating. The last thing you want is for a spilled cider or a torrential downpour to destroy your only source of power.

Look for an IP67 rating, which guarantees the device is fully protected against dust and can withstand being submerged in up to 1 metre of water for 30 minutes. Based on our rigorous field testing in the damp Welsh valleys, models with thick, rubberised port covers and reinforced shock-proof casings are absolutely essential for surviving muddy festival conditions and ensuring your tech makes it home safely.