Case studies

The numbers behind commercial energy savings.

Detailed cost comparisons showing the usage, rates and calculations behind reductions of roughly 35%.

Commercial figures in pounds and pence

Every saving is shown from start to finish.

Each example sets out the annual usage, old position, new position and exact calculation. That makes it easy to judge the opportunity against your own bills.

35.4% lower unit-cost spend

Manufacturing

Half-hourly electricity procurement

This cost comparison uses a 24-hour manufacturing site consuming 480,000 kWh a year, with a renewal position of 31.40p/kWh and a new fixed rate of 20.30p/kWh.

Annual electricity use: 480,000 kWh
Previous unit rate: 31.40p/kWh
New unit rate: 20.30p/kWh
Annual saving: £53,280
Percentage reduction: 35.4%
Three-year value: £159,840

How the saving is calculated

Previous annual energy charge480,000 kWh × £0.314 = £150,720

New annual energy charge480,000 kWh × £0.203 = £97,440

Annual difference£150,720 − £97,440 = £53,280

The 11.10p/kWh rate difference reduces the annual unit-cost spend by £53,280. Across a three-year contract, the like-for-like difference is £159,840.

Compare this with my current costs

£28,193 first-year benefit

Warehousing & logistics

Commercial solar matched to daytime demand

This solar assessment uses a distribution warehouse consuming 310,000 kWh a year and a 140 kWp rooftop system, measured against a 25.80p/kWh imported electricity rate.

Annual electricity use: 310,000 kWh
Solar system: 140 kWp
Annual generation: 119,000 kWh
Used on site: 106,000 kWh
Grid demand reduced: 34.2%
First-year benefit: £28,193

How the saving is calculated

Avoided imported electricity106,000 kWh × £0.258 = £27,348

Export income13,000 kWh × £0.065 = £845

Total first-year benefit£27,348 + £845 = £28,193

Using 106,000 kWh of solar power on site cuts imported electricity by 34.2%. Avoided import cost and export income together equal 35.3% of the site's previous annual unit-cost spend.

Compare this with my current costs

34.7% lower energy charge

Hospitality

Combined gas and electricity renewal

This combined renewal review uses a hotel consuming 190,000 kWh of electricity and 520,000 kWh of gas each year, with both contracts reviewed together.

Electricity use: 190,000 kWh
Gas use: 520,000 kWh
Previous annual cost: £97,470
New annual cost: £63,670
Annual saving: £33,800
Percentage reduction: 34.7%

How the saving is calculated

Electricity30.50p to 20.10p/kWh = £19,760 annual saving

Gas7.60p to 4.90p/kWh = £14,040 annual saving

Combined annual difference£19,760 + £14,040 = £33,800

Reviewing both fuels against the same renewal timetable produces a £33,800 annual difference. If those rates remained fixed for three years, the energy-charge difference would total £101,400.

Compare this with my current costs

Figures use the consumption and rates shown and are not a quotation or guaranteed saving. VAT, Climate Change Levy, standing charges, capacity charges, finance costs and maintenance are excluded unless stated.

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