Commercial solar for schools & academies.

Schools and academies sit in an unusual position for commercial solar. Most of the demand falls in weekday daytime through term time, the large hall, block and sports-hall roofs tend to be flat or shallow-pitched and unshaded, and the operator usually carries a clear sustainability and net-zero mandate alongside a tight energy budget. That combination makes a school estate worth modelling properly rather than estimating from roof area.

For a multi-academy trust, the case gets stronger still. Once one site is surveyed and modelled, the same engineering and procurement approach can roll across the estate, so the trust is not starting from scratch building by building. Trusts and local authorities usually buy work of this size through a formal tender or a framework call-off rather than a single quote, and our page on solar tenders and ITT specifications sets out what to ask bidders for so the responses come back comparable. We treat a MAT as a portfolio rather than a string of one-off jobs. A sixth-form or FE college estate sits under the same approach with a longer load profile, because labs, IT rooms and let facilities keep drawing outside the teaching day, so each building is read on its own half-hourly profile rather than against an assumed school calendar.

Solar earns most when the generation is used on site. A unit consumed offsets an expensive import unit, while a unit exported is paid far less, so the return tracks how well the array output lines up with the building's demand through the day, which we read from your half-hourly metering data. For a school, that match is good when it matters most. Lighting, IT suites, kitchens, ventilation and heating pumps draw steadily through the school day, which is the same window the roof is generating, so a high share tends to be self-consumed during term time.

The honest qualifier is the calendar. Weekends, half-terms and the long summer holiday pull occupancy right down, and that is when a school is most likely to export. We do not paper over that. Where the daytime term-time match is strong, the array is sized to it. Where holiday export looks significant, we look at whether battery storage shifts generation into out-of-hours base load, or whether sizing across several sites in a trust evens out the overall pattern. The point is to size to the load the estate actually carries, not to fill a roof that would export at a low price for weeks at a time.

A school site typically offers several large, low-pitch or flat roofs across the main teaching blocks, hall and sports facilities, often unshaded and well-oriented, which makes for a clean, simple array layout. As an indicative band for orientation only, school and academy sites tend to fall around 50–250 kWp per site, with a multi-academy trust often running a portfolio of arrays across its estate. Treat that band as scale-setting rather than a quote. The real figure comes from the on-site survey and the half-hourly load model for your specific roofs and your actual consumption.

The roof and the load are only half the question for a school. The other half is how the work is paid for, and the routes here are particular to the education estate. Capital from trust or governing-body reserves buys the array outright and keeps every unit of the saving, which suits a multi-academy trust with a planned capital programme and a board willing to commit reserves against a modelled return. Where reserves are tight, the public-sector decarbonisation routes matter: Salix-administered funding and the Public Sector Decarbonisation Scheme are aimed squarely at the public estate that maintained schools, academies and trusts sit within, and we set out how that fits on our PSDS and Salix grants page. These rounds open and close on their own timetable and carry eligibility tests, so we treat them as a route to check against your site, not a certainty.

Private finance is the third route, and it spends no school cash up front. A power purchase agreement or lease either puts a funder's capital on your roof and sells you the generation at an agreed rate, or spreads the cost of an owned asset across a fixed term. For a school carrying a tight revenue budget and a long capital backlog, that distinction between capital and revenue spend is often the deciding factor rather than the headline cost. We model the cost and the saving against your half-hourly data and lay the routes side by side in the proposal so the finance committee can compare them honestly. We do not publish a per-school figure, because it turns on roof area, the array size your load justifies and the route you choose, and the only sound number comes from your own data. The wider commercial finance options are set out in full alongside the grant routes.

The funding case also sits inside a duty most schools now carry. The Department for Education expects every setting to have a climate action plan and a named sustainability lead, and on-site generation is one of the few measures that answers that duty while cutting a hard revenue cost at the same time. A rooftop array gives a reportable carbon reduction a trust can put in front of its board, its diocese or its members, which is why the strongest cases here pair the energy saving with the sustainability mandate rather than treating them as separate conversations.

The figure that decides a school scheme is the self-consumed share, and we read it from your half-hourly metering rather than a category average. As a modelling starting point we confirm in PV*SOL, not a guaranteed output, a well-orientated, unshaded roof in this region is modelled from a yield in the order of 850 to 950 kWh per kWp per year, with a performance ratio we set from the real survey of pitch, orientation and any plant shading. We then line that modelled generation against your term-time weekday demand to give an honest split of what the building uses and what spills to export over the holidays, before a single panel is specified. Two schools with near-identical roofs can return very different self-consumption once the actual timetable, kitchen load and IT estate are read from the meter, which is exactly why the band on this page is scale-setting and the real answer is modelled per site.

That modelling has to account for the school's own pattern of use. A site with a wraparound nursery, a let sports hall, holiday clubs or a community wing carries a steadier daytime and out-of-term load that lifts self-consumption above the bare term-time picture, while a site that genuinely empties over the summer leans harder on the export and storage question. We read those uses from the data and the survey rather than assuming a standard school calendar, and where the holiday export looks significant we set out whether battery storage or a portfolio view across a trust is the honest answer before anything is sized.

A school array of any real size needs a grid connection agreed before it can run. Across Yorkshire and northern Lincolnshire the network operator is Northern Powergrid, and an export-capable commercial system needs a G99 connection agreed with them, which is commonly a process measured in weeks and has to be built into the programme rather than discovered late. We start that application early so it runs in parallel with design rather than holding up the install. The survey stage is also the point to check roof age and condition against the array's life, so a trust is not fixing panels to a covering due for replacement inside the system's term.

The works themselves land on an occupied site with children present, and that shapes the programme from the survey onwards. Every commercial install over 50 kWp runs under CDM 2015 with an appointed Principal Designer and Principal Contractor, and on a school that sits alongside safeguarding, DBS-cleared site access, segregation of the work area and the school's own access and visitor procedures. The in-house drone survey captures the roofs without scaffolding or a single panel being touched during lessons, and wherever the calendar allows we plan the disruptive roof and electrical works into half-terms and the summer holiday and run heavier activity out of hours, so the live school day is disrupted as little as the programme permits.

Once a trust holds more than a handful of sites, the work stops being a roof and becomes a programme. Each school is surveyed and modelled on its own merits, then the buildings are ranked by how much of their generation they self-consume and how quickly the modelled case stacks up, so the early phases lead with the roofs that earn first and the weaker sites follow once the results from phase one are metered. That ranking comes out of the per-site PV*SOL model and the half-hourly load rather than from roof area, and it lets the capital land across more than one budget year instead of arriving as a single switch-on.

The grid position is what usually sets the pace across an estate. A trust draws through several supply points rather than one, so a G99 connection has to be agreed with the network operator at each point that will export, and those applications run in parallel rather than as one submission. We build the connection evidence from the same PV*SOL model that sizes each array, so the network sees a real per-site case rather than a round number, and we phase the rollout so the strongest roofs can be energised while later supply points are still in connection. Where part of the estate is older or listed fabric, the in-house drone survey reads pitch, plant and condition without anyone walking an uncertain roof first, and we say early where a roof is better left alone.

A publicly funded school estate rarely awards a programme this size by a single direct order. The work is bought through a compliant route, commonly a framework call-off, a dynamic purchasing system or a tendered process, and social value increasingly carries weight in the award alongside price. That changes what the specification has to ask for, because every bid has to be pricing the same engineered system if the responses are to be scored on the engineering rather than on the headline figure. Our page on solar tenders and ITT responses sets out that sequence from selection questionnaire to award.

It also changes what the technical work has to produce. The surveys, the per-site PV*SOL models and the connection position feed the bid as well as the design, and a grant-supported programme expects them in a form its reporting can audit. We scope the local employment, skills and supply-chain commitments the social-value criteria are scored against early rather than bolting them on once the design is fixed, and we document the work so it stands up to an audit. Treating an estate as one programme rather than a string of separate orders is also what keeps the procurement proportionate, since a single planned programme can be procured and governed once instead of being re-tendered school by school.