O&M pricing benchmarks for the UK C&I market in 2026
What people are actually charging for commercial solar O&M in 2026, broken down by site size and scope. Ranges, not testimonials — and what's driving the spread.
The hardest question to answer in commercial solar O&M is also the most basic one: what should this cost? Owners want a number. New entrants from the installer side want to know what to put on their first O&M proposal. Established operators want to know whether they’re priced sensibly against the market.
There’s almost no public data on this. Solar Energy UK publishes capacity statistics; nobody publishes a pricing benchmark. The numbers below are drawn from our own quotes, our own contracts, and a sample of what we see across UK operators in the conversations we have routinely. They’re ranges, not exact figures, and they’re a snapshot of where the market actually sat in early 2026.
If your pricing falls inside the ranges, you’re roughly in the market. If it falls outside, that may be a deliberate position or it may be a price you should revisit.
The two-part structure
Almost every commercial O&M contract in the UK is some flavour of two-part:
- A fixed annual fee covering monitoring, reporting, planned maintenance and the inspection cadence
- A reactive component covering unplanned site visits and repairs, either time-and-materials or capped within the annual fee
The split between the two varies. Some contracts are entirely fixed-fee with reactive work absorbed up to a cap; others split out reactive work entirely. Both shapes are normal.
Pricing is most commonly quoted per kWp installed per year for the fixed component, and per visit + parts at cost for the reactive component. Some larger operators prefer a flat per-site annual fee. The conversion between the two isn’t difficult.
Fixed-fee ranges by site size
These are the ranges we see for the fixed annual fee on rooftop commercial sites in 2026, per kWp:
| Site size | Per kWp / year | Per site / year |
|---|---|---|
| 50-100 kWp | £8 - £14 | £400 - £1,400 |
| 100-250 kWp | £6 - £10 | £600 - £2,500 |
| 250-500 kWp | £4 - £8 | £1,000 - £4,000 |
| 500 kWp - 1 MWp | £3 - £6 | £1,500 - £6,000 |
| 1 MWp+ | £2 - £5 | £2,000+ |
A few things to note:
- The per-kWp figure drops with site size — there’s a meaningful fixed overhead per site (one annual visit, one inspection report, monitoring setup) that doesn’t scale linearly with capacity.
- The top of each range reflects a fuller scope (more frequent inspections, faster SLAs, included reactive work). The bottom reflects monitoring + an annual inspection + report.
- The ranges widen at the small-site end because the fixed-cost overhead dominates.
These figures are our own — they’re what we quote, what we see in tenders we don’t win, and what peers across UK operators share with us informally. There’s no industry-published benchmark to anchor against, which is part of why we’re putting these in the public record.
What drives the spread within a range
Two contracts on identical 500 kWp roofs can be priced 50% apart. The honest reasons:
SLA tightness. A 4-hour response, 24-hour-to-attend SLA costs significantly more than a “next working day” SLA, because it commits the operator to staffing patterns that don’t otherwise pay back. Sites with stringent SLAs are at the top of the range.
Inspection cadence. Annual periodic inspection is the baseline. Biennial thermal imaging is common. Quarterly walks add to the price. Monthly cleaning rotations (where the site warrants it) add more.
Reactive scope. “Reactive included up to N visits per year” vs “reactive at T&M”. The included-visit model is more expensive but more popular with owners who want predictable costs.
Geography. A site three hours from the nearest engineer base costs more to service than one twenty minutes away. The mileage and the travel time both compound.
Risk. A rooftop with a known mechanical issue (the cliché is a leaking flat roof that’s been deferred for two years) costs more to take on. We’ve walked away from contracts where the site condition meant we’d be doing roof repairs for the lifetime of the contract.
Reactive work pricing
The going rates we see for reactive work in 2026:
- Skilled engineer day-rate: £450 - £750 per day, including vehicle and standard tools. The spread depends on region and overtime structure.
- MEWP (cherry picker) hire: £200 - £400 per day depending on reach and access. Often passed through to the client at cost.
- Specialist test equipment (megger, IV-curve tracer, thermal camera): bundled into the day rate by most operators.
- Parts: at cost + a markup. 10-25% markup is the common range. Some contracts specify cost-plus-zero with the operator’s margin entirely in the annual fee.
- Out-of-hours premium: 1.5x to 2x weekday rate is typical.
Where O&M margins actually come from
For operators thinking about whether their pricing is sustainable, the margin math matters.
A small rooftop fleet of, say, twenty 200-500 kWp sites generates somewhere between £40,000 and £80,000 in annual fixed O&M revenue across the portfolio. Direct costs (monitoring tool, vehicles, base wages, inspection time) usually run £25,000-£50,000. Reactive work is approximately break-even on T&M; the margin sits in the fixed fee.
This means a twenty-site fleet is barely a full-time business at the bottom of the pricing range, and a reasonable supplementary revenue stream at the top. Operators who start with O&M as an installer add-on and then scale it as their own line of business cross the threshold somewhere around 30-50 sites depending on the price point.
The monitoring tool you use is, in this math, a meaningful cost driver. A platform that costs £100 per site per month against revenue of £100-£400 per site per month is taking 25-100% of your O&M revenue before you’ve paid an engineer. That’s why the SolarFleet pricing tops out at £3-£5 per site per month — we’ve sat on the operator side of this equation.
Contract structures we see
A few common shapes, with comments:
Per-site flat annual fee with capped reactive. The most common shape. Predictable for both sides. Works well at scale.
Per-kWh of generated energy. Rare in the UK rooftop market. More common on utility-scale and on PPA structures where the O&M fee tracks the revenue. Aligns incentives nicely but can be hard to underwrite for the operator on a new site.
Performance-linked. A base fee plus bonuses or penalties tied to performance ratio against a contractual baseline. Increasingly common on larger ground-mount sites. Rare on rooftops, partly because the rooftop PR baseline is harder to set.
Cost-plus. All costs passed through with an agreed margin. Honest but administratively painful for small fleets. We don’t see it much on rooftop.
What’s changed since 2024
The picture has shifted noticeably in the last two years:
- The price floor has come up. O&M rates that looked acceptable in 2023 are now squeezed by component cost inflation and wage rises. Operators who haven’t repriced their existing contracts since 2022 are typically losing money on them by 2026.
- Software is a more explicit line item. Owners are increasingly asking what platform their operator uses; the days of opaque “monitoring fees” are ending.
- SLAs are tightening. As the installed fleet ages and faults become more common, owners are more focused on response times. The mid-2020s expectation is that string-level faults are detected the same day they occur. That maps directly to the pricing premium for sub-hour detection we wrote about previously.
- Multi-brand portfolios are now the norm. A typical mid-size operator has SolarEdge, Solis and at least one legacy brand in their fleet. Operators charging single-brand pricing on multi-brand fleets are absorbing the operational overhead.
Advice for installers entering the O&M market
If you’re an installer with a portfolio of sites you’ve built and you’re thinking about formalising the O&M side of the business, three things to think about before you set a price:
- Cost out a full year on a representative site. What does monitoring cost? What does one planned visit cost? What does the typical reactive workload look like? Multiply by the number of sites you expect to be running. If the math doesn’t work at the bottom of the market range, you need a different operating model — not a different price.
- Decide what’s included and what isn’t. Reactive work scope is the place most O&M contracts go wrong. Be specific. List what’s covered and what isn’t.
- Plan for the second site visit. New O&M contracts often look profitable on the first year because no major reactive work has happened yet. Make sure the price holds up across a five-year SLA where year three has a string-level fault, year four has an inverter swap, and year five has a roof access dispute.
Our installer-facing notes on bringing O&M into your business cover this in more detail.
The disclosure
This isn’t an academic benchmark study. It’s one installer’s view of where the UK rooftop O&M market sits in early 2026, drawn from our own contracts, our own quotes, and a lot of conversations with people in the same position.
If your numbers look different — we’d genuinely like to hear. Honest pricing data is hard to come by in this industry and the more of us who put approximate figures into the public record, the better the market gets for everyone in it.
SolarFleet is priced at £5/site/month for sites 3-50 and £3/site/month above 50, with the first two sites free forever. We did the math from the operator side. See pricing or start free.
Josh runs InspireGreen, a solar installer based in Cardiff, and builds SolarFleet — the O&M platform we use to monitor our own sites. Most posts here come straight out of the work: a case we dealt with, a feature we shipped, or a thing we wish we'd known earlier.