Renewable energy for businesses, FAQs

In five complementary ways. First, cut waste with energy management, voltage optimisation, LED and controls. Second, generate clean power on site, usually solar PV on the roof, land or car park. Third, store and shift that power with battery storage and smart EV charging. Fourth, electrify heat and transport with heat pumps and EV chargers, ideally run on your own generation. Fifth, fund and procure through capital allowances, grants, or a Power Purchase Agreement for zero-capex clean power. Most businesses start by measuring their demand and adding solar, then build out from there.

For most UK businesses, solar PV is the best first move: it is low-risk, needs little space beyond an existing roof, aligns generation with the working day, and pays back in 5-8 years. But the best answer depends on your site. A rural site with land might add wind; a business with a gas-heavy heat demand needs heat pumps to cut Scope 1 carbon; a fleet operator prioritises EV charging. The genuinely best result comes from an independent assessment that sequences the right mix for your building, not from whichever single product a salesperson happens to sell.

It scales with the measure. Energy-efficiency projects run from a few thousand pounds; a commercial solar system is roughly £600-£1,300 per kWp (so £25,000 for a small office array up to £1.5m for a factory); commercial battery storage £20,000-£500,000; heat pumps £30,000-£750,000; and EV charging from £3,000 for a couple of workplace posts to £150,000+ for a rapid hub. A Power Purchase Agreement can deliver on-site generation for zero capex. After 100% Annual Investment Allowance and available grants, the effective net cost of owned kit is significantly lower than the headline.

Yes, though most support is now via tax relief rather than direct grants. 100% Annual Investment Allowance and Full Expensing let a company deduct the full cost of solar, batteries, heat pumps and EV chargers from taxable profit. The Workplace Charging Scheme gives £350 per EV socket, the Smart Export Guarantee pays for exported power, and public bodies use the Public Sector Decarbonisation Scheme. Energy-intensive manufacturers can access the Industrial Energy Transformation Fund, and combined authorities run periodic regional SME grants. Note the domestic Boiler Upgrade Scheme does not apply to commercial buildings.

Efficiency measures pay back fastest, typically 1-4 years. Solar PV is usually 5-8 years and then delivers 15-20 years of near-free power under a 25-year warranty. Battery storage adds 5-9 years depending on how it is used, EV charging often pays back in 3-6 years on fuel and grant savings, and heat pumps run 7-12 years but remove Scope 1 carbon that nothing else can. Sequencing measures by payback, cheapest first, keeps the whole programme cash-positive as it grows.

On-site solar and efficiency cut your Scope 2 electricity emissions directly. Heat pumps and EV charging remove Scope 1 gas and fleet-fuel emissions that a green tariff cannot. On-site generation and a genuinely additional Power Purchase Agreement are credible, auditable claims for SECR, CDP and customer ESG questionnaires, unlike REGO-only tariffs which are widely seen as weak. We report tonnes of CO2 saved per measure so the numbers drop straight into your disclosures and tender responses.

Almost always, yes. The cheapest kWh is the one you never use. An energy audit plus voltage optimisation, LED lighting and better HVAC controls typically removes 8-25% of consumption at a short payback, and it means any solar, battery or heat pump you then install is sized to a lower, well-managed demand rather than paying to generate power you are wasting. Following this energy hierarchy is the single biggest reason some renewable projects pay back years faster than others.

Yes. Asset finance spreads the cost over 5-7 years and is usually cash-flow positive from month one. A Power Purchase Agreement needs zero capex: a funder installs and owns on-site generation and you buy the power at a fixed rate below grid. Corporate and sleeved PPAs contract clean power from an off-site wind or solar farm at a fixed long-term price. We model cash purchase, asset finance and PPA side by side, with the IRR and carbon outcome of each, so the board can choose on merit.

A commercial heat pump moves heat rather than burning fuel, delivering 3-4 kWh of heat for every kWh of electricity it uses (a COP of 3-4). Air-source units suit most buildings; ground-source suits sites with land or boreholes and a steady load. They replace gas or oil boilers for space heating, hot water and some process heat, and are strongest when run on self-generated solar and paired with a fabric and controls upgrade so the system is sized correctly. For non-domestic buildings the funding routes are capital allowances, PSDS and IETF, not the domestic Boiler Upgrade Scheme.

They work best together. Solar generates cheap power through the day, a battery stores the surplus, and smart EV charging draws on that stored solar and balances demand so you avoid an expensive grid upgrade. Charging a fleet or staff cars on self-generated power at a few pence per kWh, instead of grid power at 25-45p or forecourt fuel, transforms the economics and cuts both Scope 1 and Scope 2 carbon. We design these as one integrated system with load management, not three separate installs.

Yes. You stay connected to the grid, so supply is never at risk; on-site renewables reduce what you buy rather than cut you off. Modern solar reliably produces 900-1,050 kWh per kWp a year in the UK even in diffuse light, batteries and CHP add resilience, and monitoring lets you see performance in real time. Systems carry 20-25 year warranties and, designed properly, need little maintenance. If anything, adding on-site generation and storage makes a business more resilient to grid prices and outages, not less.

Look for independence and evidence. A single-product installer is incentivised to sell their one box; a genuine renewable energy specialist assesses your whole site and recommends the right mix and order, even when that means telling you to wait or to spend elsewhere first. Check for MCS and OZEV certification, insurance-backed warranties, half-hourly data modelling you can see, fixed-price proposals, and real commercial case studies. Ask them what they would not install on your site, an honest specialist always has an answer.