Specialist solar panels for schools in Chesham
Buckinghamshire has 233 state-funded schools and colleges, and most of them are buying electricity in exactly the hours their own roofs could be making it. We start with the roof build up and the age of the covering, because across a school estate that is usually what decides which block goes first.
481,100 kWh a year, modelled for a 540 kWp array on roughly 1,604 sqm of clear roof. That is the size applied for at the nearest school scheme on record. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in Chesham- 1 teaching block
- 2 hall and kitchen
- 3 sports hall
- 4 1960s block, no array
- first phase
- later phase
Illustrative layout for an estate of this size. The array is drawn at about 345 kWp, roughly 53 percent of the 650 kWp these three roofs would hold, because a school sizes to the load it can use in term time rather than to the roof it has: generation it cannot use is exported at a much lower rate than it pays to import. The hatched block carries no array because its structure has not been assessed, which on a school of that era is the usual starting point rather than an exception. Your own figures, and which of your blocks can take an array, come from the roof survey.
Solar for education buildings across Buckinghamshire
A one kilowatt-peak array on a shallow pitched roof in Chesham models at 891 kWh a year, from modelled irradiation of 1,142 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is within a few percent of our mean. Latitude is not the variable here. When the building is occupied is.
Scaled up, a 540 kWp array, sized to what the nearest school scheme on record applied for, 11 miles away at Aylesbury, models at about 481,100 kWh a year before shading, and needs roughly 1,604 square metres of clear roof. We take the size from the nearest real application rather than a round number, so the example is anchored to something a planning officer has already seen.
Spread across the year that is about 123,600 kWh landing in July and August and roughly 24,500 kWh across December and January. Scottish and Southern Electricity Networks sets what may go back onto the network here, so the July figure is the one worth putting in front of a governing body first.
Chesham ranks 5 of 8 towns we cover in Buckinghamshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 881 to 904, a spread of 23 kWh per kWp. Within Buckinghamshire that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.
School solar on record near HP5
The HP5 postcode district has no education solar entry in the Renewable Energy Planning Database. Almost no school array is large enough to be captured there reliably, so the absence tells you about the reporting threshold and very little about what is already on the roofs around Chesham.
Look 11 miles out and there is one: Aylesbury College Decarbonisation in Aylesbury, 540 kWp, applied for by Aylesbury College, which holds consent and is awaiting construction. None of our doing. It is a public planning record, and the nearest evidence available of how an application like yours is treated around here. Source: Renewable Energy Planning Database, Q1 2026.
Term dates against the Chesham generation curve
A Chesham school roof generates most in the weeks its buildings are closed. 25.7 percent of the modelled year lands in July and August alone (EU PVGIS v5.2), and the summer holiday takes roughly six of those nine weeks out of the timetable. July is the single strongest month here at 13.9 percent of the annual total, and it falls almost entirely inside the holiday.
Winter reverses it. December and January between them return 5.1 percent of the modelled year, and that is when the heating, the lighting and a full register are all drawing at the same time. The roof makes 5.9 times as much in July as it does in December, and August alone outproduces December by about 5 to one. 74 percent of the year arrives between April and September, and the point of that figure is not that the summer half goes unused, because April, May and June are full teaching months that draw hard. It is that the concentration peaks in the few weeks at the end of it when the building is shut.
Put the two calendars together and roughly 49 percent of a school's generation nationally lands on a session day, against about 71 percent for a business open every weekday. That gap is the whole difference between appraising a school roof and appraising any other commercial one, and it barely moves from town to town.
Then there is the afternoon. From roughly three o'clock the building empties while the roof is still working, so a system sized on annual consumption will over-generate in exactly the hours nobody is there. We size on half hourly data for that reason.
None of that makes a Chesham scheme a bad one. It changes what the scheme should be: sized against the base load that runs whether or not the school is open, which on most sites is servers, comms, catering refrigeration, ventilation and hot water, with lettings, holiday clubs and summer works added on top. Where that base load is thin, the choices are storage, an export arrangement through Scottish and Southern Electricity Networks, or a smaller array that consumes nearly everything it makes.
We set out the whole argument about term dates and the generation curve on the home page, and what it does to a payback figure under costs.
- generated while the school is open
- generated at a weekend or in the holidays
The same figures as a table
| Month | Session days | Output, kWh per kWp | School open | School closed |
|---|---|---|---|---|
| Jan | 20 | 24 | 15 | 9 |
| Feb | 15 | 38 | 20 | 18 |
| Mar | 21 | 72 | 49 | 23 |
| Apr | 12 | 103 | 41 | 62 |
| May | 17 | 118 | 65 | 53 |
| Jun | 21 | 123 | 86 | 37 |
| Jul | 11 | 124 | 44 | 80 |
| Aug | 0 | 105 | 0 | 105 |
| Sep | 20 | 82 | 55 | 27 |
| Oct | 17 | 50 | 27 | 23 |
| Nov | 21 | 30 | 21 | 9 |
| Dec | 15 | 21 | 10 | 11 |
| Year | 190 | 890 | 433 | 457 |
Grid connection through Scottish and Southern Electricity Networks
Connections around Chesham are handled by Scottish and Southern Electricity Networks, which sets the export limit for the site. Above 3.68 kW per phase the connection runs under G99, so the export limit is agreed in advance rather than assumed. Where the local network is constrained, an export-limited connection usually still makes the scheme work, because a school uses most of what the roof makes during the working day.
Across Buckinghamshire the planning database records 127 solar schemes totalling 955 MW, of which 21 are operational (REPD Q1 2026).
Buckinghamshire schools, phase by phase
Buckinghamshire has 233 open state-funded schools and colleges on the DfE register teaching 89,335 pupils between them. Source: DfE Get Information About Schools.
The split is 184 primary, 37 secondary, 11 special and 1 further education, at an average of 383 pupils a site. At 5 primaries to every secondary, most of the buildings here are small. That is not a reason to skip them, but it does mean the usable area on a primary is a hall roof and a teaching block rather than an estate.
For a trust with more than one site in Buckinghamshire, the first survey is worth running across the whole estate. It tells you which roofs are near the end of their covering life, which have the switchboard headroom, and therefore which one should carry the first array.
Book a roof survey at your Chesham school
Roof condition decides the order of works on most school estates, so that is where we start. Send us the postcode and a rough roof area, with twelve months of half hourly readings if you have them, and we come back with usable area, modelled output against your own load, and the funding routes.
Lenzie Consulting Ltd arranges the survey and passes your details to an MCS-certified installation partner so they can quote. We do not carry out the installation ourselves.
Chesham school solar, answered
- Is there enough sun around Chesham for this to be worth doing?
- The model gives 891 kWh a year for every kWp installed at this latitude, so a 540 kWp array comes out at roughly 481,100 kWh a year before shading. It needs about 1,604 square metres of clear roof once walkways and rooflight setbacks are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- Does a Chesham school waste its generation in August?
- 25.7 percent of the modelled annual output for Chesham falls in July and August, when the buildings are closed for most of six weeks (EU PVGIS v5.2). It does not go to waste, but it only has three places to go: the base load that runs regardless, such as servers, catering refrigeration and ventilation; storage; or export under an agreement with Scottish and Southern Electricity Networks. We model all three against your half hourly data before an array is sized.
- Will the network around Chesham accept the export?
- Scottish and Southern Electricity Networks is the distribution network operator for Buckinghamshire. Anything above 3.68 kW per phase connects under G99, and the application fixes the export limit. On a school site the incoming supply is often the binding constraint rather than the roof, so we ask that question before anyone sizes an array.
- Is planning permission needed for panels on a school in Chesham?
- Usually permitted development covers a roof array on a school, with prior approval from Buckinghamshire needed above a capacity threshold. A ground mounted array in the grounds is a different question and much more likely to need a full application. We check both before design sign-off.
- How many schools are there around Chesham?
- Buckinghamshire has 233 open state-funded schools and colleges on the DfE register, with 89,335 pupils on roll. Source: DfE Get Information About Schools. We survey across the whole of that area, and where a trust holds several sites we look at them in one pass.