Specialist solar panels for schools in Swindon

School rooftop solar across Wiltshire

A one kilowatt-peak array on a shallow pitched roof in Swindon models at 899 kWh a year, from modelled irradiation of 1,151 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). Against a mean of 886 kWh per kWp across the towns we cover, Swindon is unremarkable, which is the useful finding: the scheme will be decided by the load curve, not the map.

Scaled up, a 320 kWp array, sized to what the nearest school scheme on record applied for, 16 miles away at Chippenham, models at about 287,700 kWh a year before shading, and needs roughly 950 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 73,700 kWh landing in July and August and roughly 14,700 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.

What the planning record shows around Swindon

No school or college solar scheme appears in the SN2 postcode district in the Renewable Energy Planning Database. That is a reporting threshold rather than a verdict. The database records generating stations from one megawatt upward reliably and smaller ones patchily, and almost every school array is a fraction of that, so a roof full of panels on a Swindon secondary could be generating today without ever reaching it.

The nearest education scheme on the record is 16 miles from Swindon, at Chippenham: 320 kWp at Wiltshire College, Lackham, applicant Wessex Energy Solutions, which holds consent and is awaiting construction. That is someone else's application, not ours, and it is here because it shows what Wiltshire planning has already accepted at an education site. Source: Renewable Energy Planning Database, Q1 2026.

The summer holiday problem for a Swindon school

25.6 percent of the annual output modelled for Swindon arrives in the two months a school uses least (EU PVGIS v5.2). Term ends in the third week of July and the buildings stay largely empty until September. July is the single strongest month here at 13.9 percent of the annual total, and it falls almost entirely inside the holiday.

The inverse holds at the other end. December and January together return only 5.1 percent of the year, and those are the months with the heating, the lighting and the full timetable all running at once. The roof makes 6 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.

Nationally this comes out at about 49 percent of annual generation falling on a session day. A business open every weekday sees roughly 71 percent. The 22 point gap is what a school appraisal has to absorb, and it is much the same in Swindon as anywhere else.

Daily shape compounds it. A school's load climbs from breakfast club, holds through the teaching day and falls away from about three in the afternoon, while generation is still strong until six in high summer. That is why we size against half hourly meter data rather than against annual consumption: the annual figure hides both problems.

The conclusion is not that a Swindon school should do nothing. It is that the array should be sized to the load that survives the holidays, which is usually the server room, the catering refrigeration, the ventilation and the hot water, plus whatever the site lets out over the summer. Anything above that line needs storage or an export agreement with Scottish and Southern Electricity Networks to earn its keep.

We set out the complete version of the term time arithmetic on the home page, and what it does to a payback figure under costs.

How many schools Swindon has

Swindon has 88 open state-funded schools and colleges on the DfE register teaching 36,574 pupils between them. Source: DfE Get Information About Schools.

The split is 66 primary, 14 secondary, 7 special and 1 further education, at an average of 416 pupils a site. Read 4.7 primaries per secondary as a sequencing hint rather than a statistic. A primary is a single survey visit and a modest array; a secondary is several roofs of different ages on one site, and that is where both the area and the complications are.

A trust holding more than one of these sites should look at them together. Grouping the surveys turns the grid question, the funding question and the procurement route into one exercise rather than four, and it usually changes which roof goes first.

Grid connection through Scottish and Southern Electricity Networks

Connections around Swindon 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 Wiltshire the planning database records 159 solar schemes totalling 1585 MW, of which 56 are operational (REPD Q1 2026).

Questions governors ask us about Swindon schools

Is there enough sun around Swindon for this to be worth doing?

The model gives 899 kWh a year for every kWp installed at this latitude, so a 320 kWp array comes out at roughly 287,700 kWh a year before shading. It needs about 950 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 Swindon school waste its generation in August?

25.6 percent of the modelled annual output for Swindon 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 Swindon accept the export?

Scottish and Southern Electricity Networks is the distribution network operator for Wiltshire. 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 Swindon?

Usually permitted development covers a roof array on a school, with prior approval from Swindon 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 Swindon?

Swindon has 88 open state-funded schools and colleges on the DfE register, with 36,574 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.

Nearby

• School roofs in Salisbury
• School roofs in Trowbridge
• School roofs in Chippenham
• School roofs in Devizes
• School roofs in Melksham
• School roofs in Warminster

All Wiltshire locations