Energy waste is a hidden expense that many businesses overlook, yet it can significantly impact operational costs. We conducted a study to show just how much businesses of different sizes could be losing each year due to appliances and equipment being left on unnecessarily. Otherwise known as ‘Vampire Appliances’.

Whilst conducting this study, we came to find out that for small businesses with 10–15 employees, energy waste could amount to over £900 annually, while for larger corporate offices with 100+ employees, this figure can exceed £6,900 per year.

To determine the potential cost savings of turning off vampire appliances, we analysed the appliances on standby power consumption of common office appliances. Using industry data, we calculated the average power usage of these devices when left running unnecessarily. 

For example, computers and laptops on standby consume around 4 watts per device, while HVAC systems use around 10 watts when idle. Office lighting, depending on the bulb type, can waste approximately 0.5 watts per bulb, and coffee machines left on overnight can draw 2–3 watts. Other appliances, such as televisions, set-top boxes, printers, and fridges, contribute further to unnecessary energy consumption, using anywhere from 3 to 150 watts each.

By estimating the number of hours these devices remain on outside of usual operating hours including evenings, weekends, and holidays, we calculated the annual energy waste per appliance type. These figures were then converted into cost estimates using the average UK business electricity rate. 

The results highlight the significant financial impact of energy waste, with businesses potentially losing thousands of pounds per year simply by failing to switch off unused devices.

The Cost of Appliances On Standby

The study examined various workplace appliances on standby and their energy consumption when left running outside working hours. Here are some of the key findings for different business sizes:

Small Business (10-15 Employees)

• Computers and laptops left on standby: £1,419 per year
• Office lighting left on overnight: £0 (LED/off when idle)
• Printers and photocopiers on standby: £212.87 per year
• Coffee machines left on overnight/weekends: £35.48 per year

Medium-Sized Business (40-50 Employees)

• HVAC systems running unnecessarily: £1,182.60 per year
• Computers and laptops on standby: £315.36 per year
• Office lighting left on overnight: £1,182.60 per year
• Coffee machines and microwaves: £535.13 in unnecessary costs

Large Corporate Business (100+ Employees)

• Computers and laptops on standby: £630.72 per year
• HVAC systems running outside office hours: £1,182.60 annually
• Office lighting and signage left on overnight: £1,182.60 per year
• Coffee machines and kitchen appliances: £283.83 in wasted energy
• Smart TVs and display screens: £2,128.68 per year
• Fridges and freezers: £354.87 per year
• Telephones and phone systems: £473.04 per year

How Businesses Can Cut Energy Waste

In a time when cutting costs and improving sustainability are key priorities, these figures underscore the need for immediate action. After Ofcom announced in February that energy prices are predicted to surge again by 6.4% in April 2025, businesses are increasingly looking for long-term solutions to manage both costs and environmental impact. Many businesses are unaware of just how much they could save by implementing simple energy-saving strategies. Here are some practical steps businesses can take:

Implement an Office-Wide Power Down Policy

Encouraging staff to power down equipment at the end of the day can result in immediate cost savings. Simple reminders and automation, such as timers and smart plugs, can help enforce this policy without disruption to daily operations. Perhaps a vampire appliances list, similar to the one below could be printed and laminated, for workers to use as a reminder to power down.

Upgrade to Energy-Efficient Equipment

Replacing old, inefficient appliances with energy-efficient alternatives can cut down on long-term energy costs. For example, switching to LED lighting instead of traditional fluorescent bulbs can reduce lighting costs by up to 60%.

Invest in Renewable Solar Energy

Businesses looking for long-term savings can benefit significantly from solar power. Sustain Commercial Solar provides tailored solar solutions that help companies cut their reliance on grid electricity. With government incentives and financing options available, the initial investment in solar can often be recouped in just a few years.

Solar energy presents an opportunity to reduce dependence on the grid, stabilise electricity expenses, and lower carbon emissions. By generating renewable energy on-site, companies can mitigate exposure to energy price volatility while contributing to broader sustainability goals.

But How Much Can My Business Save By Using Solar?

The return on investment (ROI) for solar energy varies depending on business size, energy consumption, and the available solar potential. However, in most cases, businesses can expect to see the following benefits:

• Lower electricity bills: Solar panels can offset up to 80% of a business’s energy costs.
• Tax benefits and incentives: Many government-backed schemes allow businesses to claim tax relief on solar installations.
• Energy independence: Reducing reliance on the national grid protects businesses from rising energy prices.
• Sustainability credentials: As businesses face increasing pressure to meet sustainability targets, solar energy provides a clear and measurable way to reduce carbon emissions.

Making the Shift to Energy Efficiency and Solar

Businesses that take action now will benefit not only from reduced costs but also from improved brand reputation. At Sustain Commercial Solar, we offer a range of services to support businesses in their transition, from energy audits to full solar installations.

We also address the challenges businesses often face by offering flexible financing options, alongside end-to-end support to ensure we are passing on our expert knowledge to those considering investing in renewable energy.

Ensuring knowledge is shared and sustainable solutions are financially accessible to consumers and businesses, regardless of their size or resource, is key to building a sustainable future.

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Don't forget to tackle hidden energy drains like vampire appliances. Identifying and eliminating these silent energy wasters can further reduce your business's electricity costs and enhance overall efficiency.

To learn more about how your business can cut costs and improve sustainability, explore our energy-saving solutions or get in touch with our team for a custom solar assessment.

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