Solar for Care Homes UK: The Business Case and Practical Guide

Care homes are among the most energy-intensive buildings in the UK. Heating, laundry, catering, lighting and medical equipment run around the clock, pushing annual electricity and gas consumption to between 200,000 and 500,000 kWh for a mid-to-large facility. That 24/7 baseload is precisely what makes rooftop solar so attractive: unlike a factory that sits idle at night, a care home absorbs most of what a solar array generates the moment it is produced. The result is a self-consumption rate — the share of solar output used on-site — that regularly exceeds 80 per cent, compared with around 50 per cent for a typical office building.

Why the demand profile suits solar so well

Continuous demand flattens the self-export problem. Domestic solar users routinely export half their output because nobody is home during peak generation hours. Care homes have no such problem: kitchens, laundry rooms, HVAC systems and communal lighting draw power from 6 am to 11 pm every day of the year. Morning and lunchtime peaks overlap almost exactly with the solar generation window (roughly 8 am–4 pm in winter, 6 am–7 pm in summer).

Energy costs typically account for 6–12 per cent of a care home's operating expenditure, and monthly bills can range from around £1,200 for a small family-run home up to £13,000 for a larger nursing or dementia facility. Reducing that spend through on-site generation has a direct and material impact on operator margins — important at a time when the sector is under sustained cost pressure.

Typical system sizes and savings

Most care homes suit a 50–200 kWp rooftop array. A 50-bed home with 600–900 m² of south-facing or east/west-split roof space typically accommodates 80–120 kWp of panels generating 70,000–100,000 kWh per year. A larger 80-bed nursing home may support 150–200 kWp, generating 130,000–175,000 kWh annually.

At a commercial grid rate of around 25–30p/kWh, displacing 100,000 kWh saves roughly £25,000–£30,000 per year on electricity purchases alone. Add battery storage to capture surplus lunchtime generation and shift it into the evening demand peak, and savings can rise by a further 10–20 per cent. For more on how battery pairing works, see our guide to home battery backup power, which covers the same charge-discharge principles that apply to commercial sites.

Funding and finance routes

Power Purchase Agreement (PPA). For operators who want to avoid capital outlay, a solar PPA is the most common route. A third-party investor funds and owns the system; the care home buys the electricity it generates at a pre-agreed pence-per-kWh rate, typically 15–20 per cent below the grid rate. At the end of the term (usually 10–25 years) ownership transfers to the operator, who then benefits from near-free generation for the remainder of the system's life. Maintenance and insurance are covered by the investor throughout.

Annual Investment Allowance (AIA). Operators who prefer to own their system outright can use the AIA to deduct the full capital cost — typically £60,000–£250,000 for a 50–200 kWp system — from taxable profits in the year of purchase. The AIA is permanently set at £1,000,000 per year. HMRC classifies solar panels as special-rate plant and machinery, meaning they do not qualify for full expensing, but they do qualify for AIA and for the 6 per cent Special Rate Writing Down Allowance thereafter. The 50% First Year Allowance that applied to special-rate expenditure expired on 31 March 2026. For a broader look at commercial solar economics, including payback calculations, see our commercial solar panels guide.

Salix Finance (public-sector operators). NHS-owned care homes and local-authority-run facilities may access interest-free capital loans through Salix Finance, which administers government funding for public-sector energy projects. Typical awards range from £20,000 to £2,000,000 with repayments structured to match the energy savings delivered.

Great British Energy community grants. In 2026 the government's Great British Energy programme awarded mayoral combined authorities a share of £10 million for rooftop solar on community facilities including care homes. Liverpool City Region, for example, received funding specifically for a care home and leisure centre solar programme projected to deliver £4.6 million in lifetime bill savings.

Planning and permitted development for C2 buildings

Care homes fall under Use Class C2 (residential institutions) in England, alongside hospitals, nursing homes, boarding schools and residential colleges. The general permitted development rights for rooftop solar panels under Part 14 of the Town and Country Planning (General Permitted Development) (England) Order 2015 do extend to C2 buildings in principle, provided panels do not protrude more than 200 mm from the roof surface and do not project above the highest point of the roof.

However, several common complications apply to care homes specifically:

• Listed buildings always require listed building consent before any solar installation.
• Conservation areas — roof panels on a front or side elevation facing a highway require full planning permission.
• Ground-mounted arrays over 9 m² require planning permission regardless of use class.
• Large commercial arrays (typically above 50 kWp) are generally subject to a prior-approval check under Part 14, Class J of the GPDO. Operators should engage their local planning authority early.

Engaging an MCS-certified installer experienced in commercial C2 projects is strongly advisable, as they will be familiar with the DNO notification process and the prior-approval pathway.

Regulatory context: ESOS, CQC and net-zero commitments

ESOS Phase 4 applies to any organisation that employs more than 250 people or has annual turnover above £44 million and a balance sheet above £38 million. The qualification date for Phase 4 is 31 December 2026, with a compliance deadline of 5 December 2027. Qualifying care home groups must commission an energy audit identifying cost-effective saving measures. A solar installation identified by an ESOS audit and subsequently implemented demonstrates tangible compliance progress and can support the business case internally.

CQC Well-led framework. The Care Quality Commission now includes environmental sustainability — specifically leadership and delivery of green plans — in the Well-led domain of its single assessment framework. Inspectors assess whether providers have a credible approach to reducing their environmental impact. A documented solar project, with metered output and emissions reduction figures, provides concrete evidence for that assessment.

NHS and health-sector net-zero targets. For NHS-commissioned services and NHS-owned facilities, the statutory obligation under the Health and Care Act 2022 requires NHS bodies to have regard to net-zero emissions targets. The NHS's published ambition is to reach net zero by 2045, with an 80 per cent reduction in emissions by 2036–2039 from a 1990 baseline. On-site solar is one of the most cost-effective near-term steps toward those targets.

Practical steps for operators

Start with a desktop feasibility assessment. An MCS-accredited commercial installer will use roof surveys (or satellite imagery) to estimate available area, shading factors, orientation and structural load capacity. Most reputable firms offer this at no charge as part of a commercial proposal.

From there, the key decisions are: own (AIA) vs rent (PPA), single-site vs portfolio rollout, and whether to include battery storage for evening peak-shifting. Operators with multiple sites often negotiate framework agreements with installers that reduce per-site costs significantly.