Craft Microbreweries: Solar panels for breweries

Why a craft microbrewery is the strongest solar case in the sector

If you run a SIBA-member craft brewery out of an industrial unit, brewing by day and defending a wafer-thin margin against rising energy bills, this is the page written for you. The archetypal craft microbrewery is the single best-fit candidate for commercial solar in the whole brewing sector, and it comes down to one thing: your electricity is used at the same time the sun is generating it. Where a hotel or a warehouse has to work hard to consume its own solar, a brewery does it naturally.

We will be honest with you, because this is your money. Around 70% of a brewery's energy is thermal, the wort boil, the hot liquor tank, steam and hot water. Solar panels produce electricity, so they cannot touch that 70% directly. What solar attacks is the other 30%: your electrical load. Anyone promising to "wipe out your energy bill" with panels alone is not being straight with you. What we can do is take a serious bite out of the electricity you buy at roughly 25p per kWh, and for a craft microbrewery, that bite is a big one.

Your load profile: glycol refrigeration is the story

A craft brewery of your size typically uses somewhere between 8 and 16 kWh of electricity per hectolitre produced. The reason solar works so well is the shape of that demand. Refrigeration and glycol chilling account for around 35% of your electrical load and it runs 24/7 through fermentation, a steady daytime and round-the-clock baseload that a solar array can feed straight into. Add packaging (~25%), compressed air (15–25%), pumps and CIP (15–20%) and lighting, and the bulk of it lands during daylight, exactly when your panels are producing.

That alignment is why craft breweries routinely achieve self-consumption of 75–90%, you use nearly every unit you generate rather than exporting it cheaply. Self-consumed solar is worth far more than exported solar: it displaces a ~25p import unit, whereas export earns you an SEG rate of only around 12–16p, supplier-set. High self-consumption is what turns a solar array from a green gesture into genuine margin defence.

Sizing and cost for a craft microbrewery

Most craft microbreweries land in the 30–150 kWp range depending on roof area (you need roughly 6 m² per kWp) and how much of your load you want to cover. Indicative figures:

• System size: 30–150 kWp (a craft micro often starts nearer 30–50 kWp; a growing brewery pushes toward 150 kWp)
• Installed cost: approximately £24,000–£135,000, at roughly £550–£1,100 per kWp, smaller arrays sit at the higher end, larger ones benefit from scale
• Annual yield: around 850 kWh per kWp per year under UK conditions
• Payback: typically about 5 years, driven by that high self-consumption, after which the array generates for another 20-plus years

Our cost breakdown and savings calculator let you model your own numbers against your actual annual kWh and unit rate.

The owner-founder's numbers: tax and funding

You are the buyer here, usually the founder, signing personally for the capital. So the financials have to be real. Commercial solar is special-rate plant for tax, which means it qualifies for the Annual Investment Allowance at 100% in year one on spend up to £1m, so a typical craft install can be written off in full against profits the year you install it. Important caveat, because misinformation is everywhere: solar is excluded from full expensing and from the new 40% main-rate first-year allowance, do not let anyone tell you otherwise. VAT on a commercial install is 20% and is reclaimable if you are VAT-registered (the 0% rate is domestic-only and does not apply to a brewery). In England, on-site solar and battery storage are exempt from business rates to 31 March 2035. See grants and funding for finance routes, note the IETF scheme has now closed with no successor, so genuine funding today means allowances, finance and SEG, not a grant cheque.

Compliance for a craft unit

A brewery is not a bare warehouse roof, and the compliance angle is part of why you want a specialist. Any array over 16A per phase connects under G99 via your DNO, with a typical 45-working-day process, and most craft sites are three-phase. Roof-mounted PV on a food-production building triggers retained food-safety regulation (Reg 852/2004, BRCGS/SALSA) for the roof works, and if you run CO2 recovery or handle malt dust there are DSEAR/ATEX zones the installer must design around. Panels on a non-domestic building fall under Class J permitted development in England (prior-approval application), but if your unit is listed, which catches a surprising number of historic brewery buildings, you will need Listed Building Consent.

"Brewed by the sun", the angle only craft can own

The financial case stands on its own, but you have something the majors cannot buy authentically: a story your drinkers care about. A craft brewery putting solar on the roof can honestly put "brewed by the sun" on the can and mean it, provenance and sustainability sell in taprooms and on bar taps in a way corporate ESG reports never will. In a sector losing roughly three breweries a week, cutting a fixed cost and sharpening your brand is a rare double.

Want to see your real numbers? Related routes: brewpubs and taprooms, nanobreweries and startups, and regional independent breweries. For the sector body, SIBA represents independent craft brewers across the UK.

Ready for honest figures against your own bills? Fill in the form for a free, no-obligation solar quote tailored to your brewery. No phone chase, no jargon, just a straight assessment of what solar would save your brewery and when it pays back.