sme·solarThe Brief
Guides

The honest reading list on UK commercial solar.

No marketing fluff, no greenwash, no installer push. The questions every UK SME asks before signing — answered with current numbers and a buyer's perspective.

Costs and payback8 min read

Commercial battery storage ROI — a worked example for UK SMEs

A line-by-line worked example of commercial battery storage ROI for a UK SME: capex, the three revenue stacks (self-consumption shift, peak shaving, time-of-use arbitrage), cycle-life and degradation, AIA tax treatment, and simple vs discounted payback. Illustrative numbers you can re-run against your own bill.

15 June 2026
Costs and payback4 min read

Solar PPAs explained — free panels, but who really wins?

A Power Purchase Agreement puts solar on your roof with no upfront cost — someone else owns it and sells you the power cheaply. It's genuinely useful in the right case, but you give up the returns that make owning so lucrative. Here's the honest trade-off.

2 June 2026
Standards and accreditation8 min read

MCS vs RECC for commercial solar — which accreditation actually protects you

Installers wave both acronyms around as proof of quality. For a business buyer only one matters the way you think, the other protects homeowners rather than your company — and above 50 kW, MCS may not even apply to your system. The real distinction, and what to put in the contract instead.

2 June 2026 · updated 31 July 2026
System design7 min read

Ground-mount vs roof-mount commercial solar — which suits your site?

Most businesses default to the roof, usually rightly. But if you have spare land — or an unsuitable roof — ground-mount changes the maths. Land area per kWp, the cost gap, planning timescales, and the point at which building on the ground starts to win.

2 June 2026 · updated 31 July 2026
System design8 min read

EV charging and solar for business — making them work together

If you're electrifying a fleet or offering staff charging, pairing it with solar is a natural fit — daytime sun for daytime charging. The cost per mile, how much array each vehicle needs, why slower chargers beat faster ones, and the grant worth claiming.

2 June 2026 · updated 31 July 2026
Solar basics6 min read

Do solar panels actually work in UK weather? The honest answer

The most common objection to commercial solar is 'does it even work in Britain?' The short answer is yes — demonstrably. What the weather really does to output, why heat hurts more than cloud, how the seasons actually split, and the one question worth asking instead.

2 June 2026 · updated 31 July 2026
Solar basics7 min read

Commercial vs domestic solar — why business rules are different

Most solar advice online is written for homeowners, and applying it to a business will mislead you. VAT, capital allowances, consumption patterns, consumer protection, grid connection and planning all work differently. The nine differences that change your numbers.

2 June 2026 · updated 31 July 2026