How Much Power Does A Refrigerated Container Use? A refrigerated container typically uses 3 to 7 kWh per hour, depending on container size, temperature set point, ambient conditions, and how often doors are opened. Over 24 hours, this usually equals 70 to 170 kWh per day, with larger 40ft refrigerated containers using more power than 20ft units.
Introduction
Understanding how much power a refrigerated container uses is critical for UK businesses planning cold storage on site. Power consumption affects running costs, electrical installation requirements, and generator sizing.
Whether you are storing food, pharmaceuticals, or temperature-sensitive stock, knowing real-world energy usage helps avoid unexpected electricity bills and operational issues.
What Is a Refrigerated Container?
A refrigerated container, often called a reefer container, is a shipping container fitted with an integrated refrigeration unit. It is designed to maintain precise internal temperatures regardless of external weather conditions.
They are commonly used for:
- Agriculture and cold chain distribution
- Food and beverage storage
- Pharmaceutical and medical products
- Catering and event logistics
Average Power Consumption of a Refrigerated Container
Power usage varies, but the figures below reflect typical UK operating conditions.
20ft Refrigerated Container Power Usage
- Average consumption: 3 to 5 kWh per hour
- Daily usage: 70 to 120 kWh per day
- Monthly usage: 2,100 to 3,600 kWh
40ft Refrigerated Container Power Usage
- Average consumption: 4 to 7 kWh per hour
- Daily usage: 100 to 170 kWh per day
- Monthly usage: 3,000 to 5,100 kWh
Larger containers consume more power due to increased internal volume and air circulation requirements.
Power Supply Requirements Explained
Most refrigerated containers in the UK require:
- 3-phase 380–440V electrical supply
- 32 amp connection
- 5-pin plug (3 phase, neutral, earth)
- Type C or Type D motor-rated breaker to prevent start-up tripping
You will also need a 5-pin plug socket positioned within 10 metres of where the refrigerated container will be installed to allow safe and compliant connection of the refrigeration unit.
A qualified electrician should always assess your site before installation.
What Factors Affect Power Consumption?
MSeveral variables directly impact how much electricity a refrigerated container uses.
Temperature Set Point
Lower temperatures require more energy. A container running at -25°C will use significantly more power than one set at +4°C.
Ambient Temperature
Containers working during summer months or in direct sunlight consume more electricity as the unit works harder to maintain internal temperature.
Door Openings
Frequent door openings allow cold air to escape, increasing compressor run time and energy use.
Container Condition
Older or heavily used refrigerated containers may use more power due to wear on insulation, door seals, or refrigeration components.
Estimated Running Costs in the UK
Using an average UK electricity cost of £0.25 per kWh:
20ft Refrigerated Container
- Daily cost: £17 to £30
- Monthly cost: £500 to £900
40ft Refrigerated Container
- Daily cost: £25 to £42
- Monthly cost: £750 to £1,250
Actual costs depend on usage patterns and electricity tariffs.
How to Reduce Refrigerated Container Energy Use
Practical ways to lower running costs include:
- Set the temperature only as low as required
- Minimise door openings
- Keep containers shaded where possible
- Ensure door seals are well maintained
- Use energy-efficient LED internal lighting
- Schedule regular servicing
These steps can reduce electricity consumption by up to 20 percent in real-world use.
New vs Used Refrigerated Containers and Power Efficiency
New refrigerated containers are typically more energy efficient due to improved insulation and modern compressors.
Used refrigerated containers may consume slightly more power but still offer excellent value when properly serviced and PTI tested.
Choosing the right container depends on budget, usage duration, and temperature sensitivity.
Why Bosh Boxes Is the Right Choice for Refrigerated Containers
- Expert advice on power requirements before delivery
- UK-spec electrical compatibility guidance
- Fully tested containers with valid PTI reports
- Honest advice on new vs used efficiency
- Nationwide delivery and support
- Containers suitable for storage or continuous operation
Related Guides You May Find Useful
Refrigerated Shipping Containers Explained (UK Buyer Guide)
Bottom Line
A refrigerated container typically uses 70 to 170 kWh per day, depending on size, temperature, and operating conditions. Understanding power requirements before purchase or hire ensures safe installation, predictable costs, and reliable cold storage.
Need Help Choosing the Right Refrigerated Container?
If you are unsure about power supply, running costs, or which container size is best for your application, Bosh Boxes can help you choose the right solution with confidence.
