Electric vs Gas: Choosing Caravan Power Sources

Caravans are sophisticated mobile homes operating on two distinct energy ecosystems. While mains electricity and leisure batteries power your lights, sockets, and sensitive electronics, Liquid Petroleum Gas (LPG) remains the heavyweight champion for cooking and rapid space heating. The ideal configuration for your caravan model depends on your touring style, the British weather, and the facilities at your chosen pitch.

Quick Comparison: Electric vs. Gas

1. The Electric Ecosystem

Mains Hook-Up (EHU)

Most UK campsites provide a 230V supply via a blue CEE plug. However, you aren't on unlimited domestic power. Most breakers are rated at 10A (approx. 2.3kW) or 16A (approx. 3.7kW). If you try to run a domestic kettle (3kW) on a 10A supply, you will trip the post. Understanding electric hook-up basics is vital to avoid mid-evening blackouts.

The Leisure Battery

Unlike a car's starter battery, a leisure battery is designed for deep cycles. It runs your 12V systems: LED lights, water pumps, and USB ports. Modern caravans like the Swift Challenger SE 480 or the Bailey Unicorn Cartagena often feature advanced control panels to monitor this discharge. For 2026, many owners are upgrading to Lithium (LiFePO4) for faster charging and lighter weight.

Solar Integration

Solar is no longer a luxury. A 100W-200W panel can keep a battery topped up indefinitely in summer, allowing you to run your fridge on gas and everything else on 12V without needing a plug. Check your payload using our Caravan Towing Calculator before adding heavy fixed panels.

2. The Gas Ecosystem

Propane vs. Butane

In the UK, Propane (red bottles) is the standard for year-round touring because it gasses off at temperatures as low as -40°C. Butane (blue bottles) stops working near freezing, making it unsuitable for winter trips in a Coachman Laser 665 or Adria Alpina.

Heating Efficiency

Gas is incredibly energy-dense. A 6kg propane cylinder contains roughly 80-82 kWh of energy. For context, a Truma or Alde heater (see our heating comparison guide) can output 4kW-6kW on gas, warming a cold van in minutes—something electric elements often struggle to match.

Practical Energy Math

The "Hook-up Headroom" Checklist

Before switching on an appliance, do a quick mental tally. On a 10A (2300W) supply:

• Fridge (Mains): ~150W
• Battery Charger: ~100W
• LED Lighting: ~30W
• Subtotal: 280W (Leaving ~2020W for other items)
• Safe to add: A low-wattage travel kettle (1000W) OR a microwave (800W).
• Danger zone: Adding a domestic 3000W hair dryer will trip the breaker instantly.

Battery Longevity

A standard 100Ah Lead-Acid battery only provides 50Ah of usable power before voltage drops too low. If you draw 5A (60W) continuously, you have 10 hours of power. Upgrading to a LiFePO4 (Lithium) battery allows for 80-90% depth of discharge and significantly faster charging cycles.

Running Costs: 2026 Outlook

With fluctuating energy prices, the "cheapest" source changes:

• Inclusive Pitch: If EHU is a flat daily rate, use electric for everything possible.
• Metered Pitch: Many UK sites now use smart meters. If a 6kg refill is £30, your cost is approx. 37p/kWh. If the site charges 45p/kWh, stick to gas for the heater.

Safety Essentials

• Carbon Monoxide (CO): Always have a tested CO alarm. Gas combustion consumes oxygen; never block floor vents or "mushrooms."
• Cable Safety: Always fully uncoil your EHU cable. A coiled cable acts as an induction coil and can melt under high loads.
• Inspections: Ensure an annual habitation service is performed by an NCC-approved technician to check gas tightness and RCD trip speeds.

Recommended Setups by Touring Style

The "Home-from-Home" (Serviced Sites)

• Setup: Standard 100Ah battery, 16A EHU cable.
• Strategy: Use an induction hob and electric kettle to save gas for the BBQ.

The "Explorer" (Off-Grid/Wild Camping)

• Setup: 200Ah Lithium battery, 300W+ Solar, Twin 6kg Propane bottles (Refillable systems like Gaslow are popular here).
• Strategy: Gas for fridge, water, and space heating. Solar for tech and lights.

FAQs

Can I run my fridge on 12V while parked?
Generally, no. Most 3-way absorption fridges only run on 12V when the engine is running (towing) to prevent flattening the leisure battery. Use gas or EHU when stationary. Compressor fridges (common in campervans) are the exception and run on 12V constantly.

Is an induction hob better than gas?
Induction is faster and safer (no flame), but it requires a high-amperage hook-up or a very expensive inverter/lithium setup. Many modern vans like the Swift Trekker S are moving toward all-electric or diesel-hybrid options.

Final Verdict

For most UK caravanners, a hybrid approach is best. Use the site's electricity for your background needs (fridge, charging, light heating) and keep gas in reserve for cooking and those frosty mornings when you need heat fast. Always check your caravan towing weight limits before adding extra batteries or larger gas cylinders.