Care homes run around the clock, every day of the year. Kitchens, laundries, lifts, hoists, lighting, nurse call systems and — increasingly — mechanical ventilation and air conditioning for resident comfort don’t switch off at 6pm because everyone’s gone home. That single fact changes the solar payback maths more than almost any other commercial building type, because it means a huge share of what the panels generate gets used on-site as it’s produced, rather than exported for a lower rate. This piece sets out realistic UK costs for care home solar in 2026, why the 24/7 load profile matters so much, and how to plan installation without disrupting residents or falling foul of CQC expectations.
Why “baseload” is the whole story for care homes
Most commercial solar economics hinge on one number: self-consumption — the percentage of generated electricity used on-site rather than exported to the grid at a lower rate. A typical office building has a self-consumption problem: solar generates all day, but the building is empty by 6pm and dark by 8am in winter, so a big chunk of midday generation gets exported at whatever the supplier’s Smart Export Guarantee (SEG) rate happens to be.
A care home doesn’t have that problem. Occupied 24 hours a day, with continuous loads from refrigeration, laundry, water heating (often significant, given infection-control laundry temperatures), lighting, nurse call, and increasingly climate control for frail residents, a well-sized system can push self-consumption rates well above what an office or retail unit would ever achieve. Every kWh used on-site instead of imported is worth the full retail rate — typically around 25p/kWh under the current Ofgem price cap framework — versus an export rate that, even at the better end of the market, tends to sit in the 12-20p/kWh range depending on supplier. That gap is the entire commercial argument for care home solar.
What a care home system actually costs in 2026
Costs scale with roof area and connected load, but most standalone care homes (typically 40-80 beds) fall into a fairly predictable band:
| System size | Typical installed cost (2026) | Best suited to |
|---|---|---|
| 20-30 kWp | roughly £18,000-£33,000 | Smaller homes, limited roof area, or a phased first stage |
| 40-50 kWp | roughly £36,000-£55,000 | Standard mid-size care home, most common bracket |
| 75-100 kWp+ | roughly £68,000-£110,000+ | Larger campuses, flat industrial-style roofs, multiple buildings |
These figures work off a commercial installed rate of roughly £900-£1,200 per kWp, which is the realistic 2026 range once you account for scaffolding/access on a two- or three-storey building, structural surveys (care homes are often older converted properties or 1990s-2000s purpose-built blocks with varying roof conditions), and a G99 grid connection application through the local Distribution Network Operator for anything above the small-scale threshold.
Battery storage is worth serious consideration given the load profile. A 30-50 kWh commercial battery bank typically adds somewhere in the £15,000-£35,000 range depending on chemistry and inverter pairing, and lets the home shift any midday surplus into the evening peak rather than exporting it — useful where daytime generation occasionally outstrips even a high baseload. For homes wanting to model this properly against their actual half-hourly consumption data, batterystorageforbusiness.co.uk is a useful independent reference point on sizing and cost before committing.
VAT is a live consideration too: residential solar and battery installations currently qualify for 0% VAT in Great Britain (in place until 31 March 2027, scheduled to revert to 5% after). Care homes are commercial premises, so this domestic relief generally doesn’t apply directly to the building itself — VAT treatment depends on the specific commercial contract and should be checked with the installer and your accountant rather than assumed, particularly where a care home operates within a mixed-use or charitable structure.
The self-consumption maths, worked through
Take a 50 kWp array on a Midlands or Southern England care home. At a typical UK yield of roughly 850-950 kWh per kWp per year (higher in the sunnier south, lower further north), that’s approximately 42,500-47,500 kWh generated annually. A 24/7-occupied building of that size will often self-consume 60-75% of that generation directly, particularly if laundry cycles and water heating can be nudged towards daylight hours. That’s roughly 27,000-35,000 kWh a year displacing grid import at ~25p/kWh — around £6,750-£8,750 in avoided purchase costs, before a penny of export income is counted. The remainder, exported under SEG, adds a further few hundred to low-thousands of pounds depending on the supplier’s rate.
Set against an all-in cost of roughly £45,000-£55,000 for that size of system, payback commonly lands in the 6-9 year range for care homes — meaningfully faster than the 8-12 years typical of lower-occupancy commercial buildings, precisely because so little generation goes to waste on export. With panels now commonly rated for 25-30+ years of service (modern N-type panels degrade at roughly 0.4% a year), a system paid back within a decade then delivers a further 15-20 years of largely free daytime electricity, with only an inverter replacement (typically £500-£1,000 for a residential-scale string inverter, proportionally more for commercial inverters) likely needed once in that period.
It’s worth comparing this against the broader hospital and healthcare estate picture too — solarpanelsforhospitals.co.uk covers the NHS and larger clinical-estate side of the same logic, where continuous critical loads make the payback case even stronger at scale.
Sizing to the roof, not just the bill
A common mistake is sizing a system purely to offset the annual electricity bill on paper, without checking what the roof can actually take. Care homes are frequently a mix of pitched residential-style roofing over the original building and flat felt or single-ply membrane roofing over later extensions — the latter usually needs a ballasted or mechanically-fixed mounting system and a structural check, since flat roofs weren’t always designed with additional dead load in mind. Roof age matters enormously: if the felt or membrane has under 10-15 years of life left, it’s usually cheaper overall to re-roof (or at least re-cover the array footprint) before installing rather than removing and refitting panels a few years later.
Shading is the other common issue — tree cover, adjacent extensions, or plant equipment (extraction units, AC condensers, water tanks) on the roof can meaningfully cut output if not accounted for at design stage. A proper site survey with a shading analysis, not just a satellite-imagery estimate, is worth insisting on before signing anything.
Installation without disrupting residents — the CQC-friendly plan
This is where care home projects differ from almost any other commercial solar installation, and it’s the part that’s most often under-planned. A few principles that consistently work in practice:
- Sequence around care routines, not convenience. Scaffolding erection, crane lifts and roof access should avoid morning personal care rounds and mealtimes. Most experienced commercial installers will build a day-by-day access plan around the home’s actual routine rather than a generic working day.
- Noise and vibration windows. Agree specific hours for drilling, cutting and any percussive work, particularly near dementia care units or rooms housing residents sensitive to disruption. A written noise management plan, shared with the home’s manager in advance, heads off most complaints before they start.
- Fire safety and means of escape. Scaffolding must never block a fire exit route, and the installer should provide a written fire strategy sign-off before work starts — this is something CQC inspectors and fire risk assessors will both want evidence of if asked.
- Infection control continuity. Where work brings contractors through shared corridors, agree PPE, signing-in and zoning protocols consistent with the home’s existing infection control policy, especially relevant post-pandemic.
- No downtime on critical systems. The switchover to the new supply/generation setup should be scheduled with the DNO and electrician for the lowest-risk time of day, with nurse call, medical fridges and any oxygen concentrators confirmed on a UPS or generator backup during the brief isolation window.
- Communicate with families, not just staff. A short notice to residents’ families explaining the works, expected duration and any temporary changes (parking, noise, scaffolding sightlines) avoids the complaints that otherwise land on the registered manager’s desk.
Getting this sequencing right is as much a project management exercise as an electrical one, and it’s worth asking any installer quoting for care home work specifically how many similar CQC-regulated or supported-living sites they’ve completed — not just commercial roofs in general.
Finding the right installer
Because of the structural surveys, DNO applications and phased-access planning involved, this isn’t a job for a general residential solar fitter working outside their normal scope. solarpanelsforcarehomes.co.uk is a dedicated resource for the sector covering sizing, funding routes and specification in more depth than we can here. On the installer side, MCS-certified commercial teams who’ve handled occupied, sensitive-access buildings are the ones to shortlist — Ecoaim in Central Scotland and D&R Energy around Bristol have both worked on commercial and multi-occupancy projects requiring exactly this kind of phased, low-disruption approach, and are worth a conversation even as a benchmark for quotes from a more local firm. For homes in Doncaster and South Yorkshire, ElectriFusion Solutions covers both the electrical certification side and the solar install under one roof, which simplifies the DNO and fire-strategy sign-off chain considerably.
Whoever you use, ask for MCS certification as standard (it’s required for SEG eligibility regardless of building type) and a structural engineer’s sign-off on roof loading in writing, not just verbally at survey stage.
The bottom line
Care homes sit in a rare position for commercial solar: continuous occupancy turns what would elsewhere be a mediocre self-consumption story into a genuinely strong one, and the 6-9 year payback typical of a well-specified system compares favourably with almost any other building type this size. The real cost isn’t just the kWp price — it’s getting the roof survey, DNO application and, critically, the phased low-disruption installation plan right from day one so residents, families and CQC inspectors never notice anything beyond a bit of scaffolding for a few weeks. For a wider sense of how commercial solar economics compare across building types before you commit to a spec, our own commercial solar panel cost breakdown is a useful next read, alongside commercialsolarpanelsinstallation.co.uk for the broader installation process from survey to commissioning.
Get three quotes, insist on a genuine structural survey rather than a desktop estimate, and size the system to the load you actually run at 2am — not just the load on the day-shift meter reading.