Specialist solar panels for schools in Truro

Schools near Truro already on the planning record

The Renewable Energy Planning Database records 1 school and college solar scheme in the TR1 postcode district. A 240 kWp roof mounted array at Sir Ben Ainslie Sports Centre, Trennick Lane holds consent and is awaiting construction. The applicant on record is Truro School.

We had nothing to do with any of them. They are public planning records, and they are on this page because the useful question for a governing body is not whether school solar works in the abstract but whether it has been consented nearby. Source: Renewable Energy Planning Database, Q1 2026.

The site plan at the top of this page is a generic estate drawn to show scale and sequencing. It is not Sir Ben Ainslie Sports Centre, Trennick Lane, and it is not any other building in Truro. We hold no drawings, roof data or consumption data for the schools named above.

The median array applied for here is 240 kWp. At 240 kWp you are covering roughly 713 square metres of roof once walkways, edge zones and rooflight setbacks come out, which on most sites means a sports hall plus one teaching block rather than the whole estate.

School rooftop solar across Cornwall

A one kilowatt-peak array on a shallow pitched roof in Truro models at 940 kWh a year, from modelled irradiation of 1,194 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 6 percent above the mean across the towns we cover, which is about as strong as a UK school roof gets.

Scaled up, a 240 kWp array, sized to the median array applied for at schools around Truro itself, models at about 225,600 kWh a year before shading, and needs roughly 713 square metres of clear roof. That size is not one we chose. It is what schools in this district have actually applied for.

Spread across the year that is about 56,900 kWh landing in July and August and roughly 11,500 kWh across December and January. National Grid Electricity Distribution 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.

The summer holiday problem for a Truro school

25.2 percent of the annual output modelled for Truro 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. June is the strongest single month here at 13.7 percent of the annual total, which is still term time, and that works slightly in your favour against towns whose curve peaks in July.

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 5.9 times as much in June as it does in December, and August alone outproduces December by about 5 to one. 73 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.

Summed over the year, about 49 percent of what a school roof makes arrives while the school is open. For a business trading every weekday the equivalent is roughly 71 percent. Nothing about Truro changes that ratio much, but plenty about your own site changes what to do with it.

Inside the day it happens again. The roof is still at three quarters of its peak at four in the afternoon, by which time a Truro school is largely empty, so the hours that look best on a generation chart are the worst on a consumption one.

A Truro governing body should read that as a sizing constraint, not a reason to stop. The base load that runs through the holidays, servers, comms, refrigeration, ventilation and hot water, is the floor the array should be built up from, and everything above it has to be justified by storage, export or summer occupancy.

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 Cornwall has

Cornwall has 277 open state-funded schools and colleges on the DfE register teaching 71,014 pupils between them. Source: DfE Get Information About Schools.

The split is 238 primary, 31 secondary, 5 special and 3 further education, at an average of 256 pupils a site. A ratio of 7.7 to one tells you where the roof area is. It is not with the 238 primaries, which mostly offer a hall and a teaching block each, but with the larger sites that were built with a sports hall and a dining block attached.

Where a multi-academy trust holds several of those sites, surveying the estate in one pass beats taking a roof at a time. The design work, the connection applications and the procurement paperwork are the same job repeated, and a trust that runs them together gets a better answer on all three.

Grid connection through National Grid Electricity Distribution

Connections around Truro are handled by National Grid Electricity Distribution, 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 Cornwall the planning database records 174 solar schemes totalling 1116 MW, of which 88 are operational (REPD Q1 2026).

Questions governors ask us about Truro schools

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

The model gives 940 kWh a year for every kWp installed at this latitude, so a 240 kWp array comes out at roughly 225,600 kWh a year before shading. It needs about 713 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 Truro school waste its generation in August?

25.2 percent of the modelled annual output for Truro 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 National Grid Electricity Distribution. We model all three against your half hourly data before an array is sized.

Will the network around Truro accept the export?

National Grid Electricity Distribution is the distribution network operator for Cornwall. 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 Truro?

Usually permitted development covers a roof array on a school, with prior approval from Cornwall 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.

Has a school near TR1 already done this?

One school scheme is on record in this postcode district, including a 240 kWp array at Sir Ben Ainslie Sports Centre, Trennick Lane that holds consent and is awaiting construction. We were not involved in it. It is a public planning record, and it matters less as proof that solar works than as evidence of what this authority and this network operator have already accepted. Source: Renewable Energy Planning Database, Q1 2026.

How many schools are there around Truro?

Cornwall has 277 open state-funded schools and colleges on the DfE register, with 71,014 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 Newquay
• School roofs in St Austell
• School roofs in Falmouth
• School roofs in Camborne
• School roofs in Bodmin
• School roofs in Penzance

All Cornwall locations