How Much Energy Does a Factory Use and What it Means for Your Energy Spend
Factories are often high energy users, but there is no single figure that applies to every site. . Energy consumption depends on the size of the site, the industry, equipment, operating hours, building condition and production output.
A small business running light assembly will have very different energy usage from a large manufacturing plant using process heating, electric motors, compressed air and refrigeration. This means average energy consumption can only provide a broad guide.
Your energy spend is also affected by your business energy contract. Unit rates, standing charges, energy prices and renewal timing all influence your final energy bills. Two businesses with similar energy consumption may still pay different amounts depending on their supplier and tariff.
Business Utility Hub helps UK businesses compare gas and electricity contracts based on real usage, current market cost and renewal dates. We check business energy prices daily, compare suppliers and explain your options clearly.
In this guide, we explain how much energy a factory may use, what affects that usage and how factory owners can reduce energy costs through better efficiency, clearer usage data and regular business energy comparison.
How much energy does a factory use?
Factory energy use varies by sector, site size and production process. A micro business may use around 10,000 kWh of electricity each year, while a small business may use closer to 25,000 kWh. Medium-sized businesses often use between 25,000 and 50,000 kWh of electricity annually, while large businesses generally use more than 55,000 kWh.
Factories in energy-intensive industries such as food production, chemicals, paper, steel, cement and pharmaceuticals can sit well above the average business energy consumption range, especially where production runs for long hours or machinery operates continuously.
Every factory has different levels of energy consumption, and that may look very different from the averages listed above. The best way to understand your own position is to review your business energy usage in kilowatt hours across a full year.
What affects factory energy consumption?
Several factors affect how much energy a factory uses.
These include:
- Industry sector: different industries have different energy usage habits. Food manufacturing, chemicals and heavy industry often use more energy than light assembly or packaging.
- Operating hours: factories running multiple shifts usually have higher electricity consumption and gas consumption than sites operating standard hours.
- Machinery and equipment: electric motors, production lines, pumps, compressors and process equipment can all increase consumption.
- Building condition: older manufacturing buildings may lose more heat due to poor insulation, increasing heating demand.
- Heating and hot water: gas is often used for space heating, process heat and hot water.
- Cooling and refrigeration: some factories rely on refrigeration, chilled storage or cooling systems.
- Lighting: large production floors, warehouses and external areas can increase electricity usage.
- Energy efficiency: inefficient equipment can inflate energy demand and increase costs.
This is why average energy figures can be misleading. A factory’s energy consumed should be assessed against what the site produces, how it operates and what equipment is used.
Where do factories use the most energy?
Most factories use energy across several key areas.
Manufacturing machinery
Machinery is often the largest driver of electricity consumption. Motors, conveyors, pumps, robotics, cutting equipment and automated systems can all use significant power.
Factories with continuous production will usually have higher energy consumption than sites where equipment is used intermittently.
Process heating
Process heating is a major energy user in many manufacturing sectors. It is common in food production, chemicals, ceramics, metalwork and paper manufacturing.
Sites using gas for heating or production processes should review both usage and contract rates, as gas prices can change quickly.
Compressed air systems
Compressed air systems can account for a significant share of factory electricity use. Leaks, poor controls and unnecessary pressure settings can waste energy.
A business energy audit can help identify whether compressed air is increasing your energy bills unnecessarily.
Lighting
Factories, warehouses and yards often need strong lighting for safety and productivity. Upgrading to LED lighting can quickly cut energy usage.
Lighting controls, zoning and timers can also help reduce energy use in areas that are not occupied throughout the day.
Heating, ventilation and cooling
Heating, ventilation and cooling systems help maintain safe working conditions. However, poor controls or badly maintained systems can increase consumption.
Better controls can reduce energy waste while keeping the building suitable for employees and production requirements.
How do factory energy bills work?
Factory energy bills are based on more than electricity and gas consumption.
A typical business energy bill may include:
- Unit rates: the cost per kWh of electricity or kWh of gas used.
- Standing charges: a flat daily rate for maintaining the supply and meter.
- VAT: applied to most business energy bills.
- Government levies: including the Climate Change Levy where applicable.
- Network costs: charges linked to moving energy through the grid.
- Metering charges: especially for larger sites or half-hourly metering.
Standing charges can make a big difference to total costs, especially for sites with multiple meters. Unit cost is important, but it should not be reviewed in isolation.
Why two factories can have different energy bills
Two factories using similar amounts of energy may still pay different amounts.
This can happen because of:
- Different energy suppliers.
- Different unit rates.
- Different standing charges.
- Contract renewal timing.
- Fixed or variable rate tariff terms.
- Meter type.
- Regional network charges.
- Different levels of efficiency.
- Different operating hours.
- Different building conditions.
For example, one factory may be on a fixed business energy contract agreed when market prices were lower. Another may be on a variable rate tariff or out-of-contract rates, increasing costs even if consumption is similar.
This is why business energy comparison matters. Comparing suppliers before renewal gives you a clearer view of whether your current contract still reflects your factory’s usage and the current market cost.
How to understand your factory’s energy usage
To manage energy spend properly, you need accurate usage data.
Start by checking:
- Annual electricity consumption.
- Annual gas consumption.
- Monthly usage patterns.
- Peak demand periods.
- Seasonal changes.
- kWh per product or process.
- Energy cost per unit produced.
- Whether bills are based on actual or estimated readings.
A smart meter or half-hourly meter can provide more detailed usage data. This can help identify when energy use is highest and whether equipment is running when it does not need to be.
A business energy audit can also identify waste, inefficient equipment and opportunities to reduce energy consumption.
Practical ways to reduce factory energy consumption
Reducing energy use can lower costs and improve operational efficiency.
Useful energy efficiency measures include:
- Maintaining machinery so it runs efficiently.
- Fixing compressed air leaks.
- Switching off idle equipment.
- Installing LED lighting.
- Improving heating controls.
- Reviewing ventilation settings.
- Upgrading old motors and drives.
- Improving insulation.
- Using solar panels where suitable.
- Training employees to report waste or faults.
Energy management systems can also help optimise production schedules and reduce wasted power in factories.
Reducing consumption is important, but it should work alongside procurement. Even if you save energy, you may still overpay if your business energy contract is no longer competitive.
What energy use means for your energy spend
Your factory’s energy spend depends on both consumption and contract terms.
Key cost drivers include:
- How much electricity the factory uses.
- How much gas the factory uses.
- Unit rates.
- Standing charges.
- Contract length.
- Meter type.
- Government levies.
- Supplier terms.
- Whether the business is in contract or out of contract.
Energy rates can change regularly. A contract that looked competitive when it was signed may not be suitable by the next renewal date.
BUH helps manufacturers review both sides of the equation: how much energy you use and what you pay for it. We compare business energy contracts from trusted UK suppliers and explain the options clearly.
How Business Utility Hub can help
Business Utility Hub helps manufacturers and other UK businesses manage business energy costs with clear comparison and contract support.
We can help you:
- Review your current business energy bills.
- Understand your electricity and gas usage.
- Compare business energy suppliers.
- Check business energy rates before renewal.
- Avoid expensive out-of-contract rates.
- Review unit rates and standing charges.
- Manage switching energy suppliers.
- Plan around contract end dates.
Our team checks prices daily, so you get a current view of the market rather than outdated averages. You’ll also have a dedicated account manager who understands your site, usage and contract dates.
There is no obligation to switch. We’ll explain your options clearly, and you only move if the recommended energy deal is right for your business.
Review your factory energy contract before renewal
There is no fixed average energy consumption that applies to every factory. Energy use depends on your industry, equipment, building, operating hours and production output.
Your final spend also depends on your business energy contract. Unit rates, standing charges, supplier terms and renewal timing all affect what you pay.
Reviewing usage, improving efficiency and comparing suppliers before renewal can help reduce long-term costs.
To review your factory’s energy position, contact Business Utility Hub.
Call 0800 781 2700 or email savings@businessutilityhub.co.uk.
