← Back to Energy guides

10 min read

How to Get 100% Renewable Business Energy

There is no single UK switch labelled “100% renewable” that fits every SME. Options span REGO-backed green tariffs from Ofgem-licensed suppliers, sleeved corporate PPAs, on-site solar or wind with residual grid supply, and blended portfolios. Each route differs in price, additionality, balance-sheet impact, and the evidence you can show auditors. This guide helps owners compare pathways without confusing marketing labels with physics.

Next step: If you use under about 50,000 kWh a year, you can get a quote in under 90 seconds online — fast, no obligation. Larger supply, half-hourly metering, or prefer chat? Use the contact page.

Green tariffs: what suppliers can actually evidence

Most green retail products combine grid supply with REGO retirement to match your consumption MWh. That is legitimate within the UK attribute-tracking framework but may not satisfy stakeholders demanding additionality. Read contract annexes for technology mix, vintage, and whether biomass or biogas is included. Microbusiness customers benefit from clearer renewal information under Ofgem rules; use that channel if marketing packs contradict the PDF schedule.

Deep-dive certificate mechanics in REGO certificates explained before signing multi-year premia.

On-site generation as part of the mix

Rooftop solar or occasional small wind reduces imported kWh and can pair with SEG export deals. You will still need a licensed supplier for the import MPAN in standard layouts. Align generation forecasts with procurement so flexible or pass-through contracts do not mis-hedge shape.

Technical primers sit in solar panels for business and wind energy for small business.

Corporate PPAs when load is large enough

Sleeved or virtual PPAs become economical when credit teams, legal capacity, and consumption volumes justify fees. SMEs approaching group structures or multi-site baskets should explore whether a parent entity can sign while sites retain retail supply.

Levies, VAT, and reporting alignment

Climate Change Levy generally still applies to taxable grid electricity regardless of green branding unless a specific relief applies. Map purchases into scope 1, 2 and 3 reporting choices with your accountant so public statements match statutory filings.

Renewable sourcing pathway comparison

Stakeholder messaging without over-claiming

Customers, employees, and regulators read different footnotes. Marketing may emphasise renewable consumption while Companies Act filings use location-based factors unless you elect market-based methods with proper contractual instruments. Align communications so LinkedIn posts do not contradict the Directors’ Report. For public sector tenders, map your evidence pack to the specific questions asked rather than attaching a generic sustainability brochure.

When budgets tighten, finance may challenge green premia. Maintain a one-page business case showing £/year cost, reputational benefits, and any reduction in offset purchases. That discipline keeps renewable sourcing in strategy conversations instead of treating it as a feel-good line item first to cut.

Technology choices: efficiency before certificates

Buying REGOs without touching waste is increasingly challenged in supply-chain audits. Pair any renewable procurement with measurable efficiency KPIs—heat recovery, VSDs, building fabric—so your story is balanced. Ofgem does not regulate your carbon narrative, but your customers might.

If you operate vehicles, remember scope 1 fuels may dwarf electricity; do not overspend on green power while ignoring fleet decarbonisation where maths says otherwise.

Document who owns on-site renewable attributes if landlords host equipment; tenants can be surprised who holds REGOs from roof PV.

A practical closing step: each year, reconcile total MWh consumed, certificates retired, and on-site generation exported. If the three do not foot within tolerance, fix data before publishing sustainability pages. UK stakeholders increasingly ask for that reconciliation explicitly.

Smaller teams should pick one primary route—usually a credible green tariff plus efficiency—before layering PPAs or on-site projects. Complexity without headcount becomes unmanaged risk, especially when only one person understands the contract stack.

When banks ask for ESG data, present the same numbers you show Ofgem-facing suppliers and Companies House filings. Inconsistent multiples of the same year raise questions faster than modest absolute emissions do.

Letter-of-authority hygiene matters as much as tariff names: expired or over-broad LOAs have delayed switches and left green products stranded on deemed-like interim rates while paperwork is re-cut. Store signed PDFs with version dates beside each MPAN, and instruct staff to forward broker correspondence to finance when pricing emails contain personal inboxes only—continuity breaks when one buyer leaves.

After each renewal, save the supplier’s green product schedule next to the REGO retirement letter for that contract year—auditors and large customers now expect that pairing on the first request, not after a chase.

Related guides

See green energy tariffs for business, power purchase agreements explained, and the energy hub.