Specialist solar panels for schools in Cwmbrân
What decides a solar scheme at a Cwmbrân school is how much of the output the site uses itself, not how much the roof makes. We arrange the roof survey, model the output against the school's own half hourly consumption, and set out the funding routes.
25.5% of the modelled year lands in July and August, on a roof that returns 903 kWh per kWp a year. The worked example below runs at 320 kWp, 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 Cwmbrân- 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 Newport
A one kilowatt-peak array on a shallow pitched roof in Cwmbrân models at 903 kWh a year, from modelled irradiation of 1,159 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is roughly 2 percent above the mean across the towns we cover, so latitude is working slightly in your favour here.
Scaled up, a 320 kWp array, sized to what the nearest school scheme on record applied for, 21 miles away at Weston-super-Mare, models at about 289,000 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 14,500 kWh across December and January. The July figure is the one worth putting in front of a governing body first.
Cwmbrân ranks 3 of 4 towns we cover in Newport on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 887 to 910, a spread of 23 kWh per kWp. Within Newport 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 NP44
The NP44 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 Cwmbrân.
Look 21 miles out and there is one: Weston College in Weston-super-Mare, 300 kWp, applied for by Weston 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 Cwmbrân generation curve
A Cwmbrân school roof generates most in the weeks its buildings are closed. 25.5 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. June is the strongest single month here at 13.9 percent of the annual total, which is still term time, and that works slightly in your favour against towns whose curve peaks in July.
Winter reverses it. December and January between them return 5 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 6 times as much in June 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.
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 Cwmbrân changes that ratio much, but plenty about your own site changes what to do with it.
The same mismatch repeats every day. Peak generation lands between eleven and three, the timetable ends shortly after, and by four the site is down to caretaking and cleaning. An annual consumption figure cannot show that, which is why we ask for the half hourly data instead.
A Cwmbrân 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 full treatment of the school year against 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 | 39 | 21 | 18 |
| Mar | 21 | 73 | 49 | 24 |
| Apr | 12 | 105 | 42 | 63 |
| May | 17 | 124 | 68 | 56 |
| Jun | 21 | 126 | 88 | 38 |
| Jul | 11 | 126 | 45 | 81 |
| Aug | 0 | 105 | 0 | 105 |
| Sep | 20 | 83 | 55 | 28 |
| Oct | 17 | 50 | 27 | 23 |
| Nov | 21 | 29 | 20 | 9 |
| Dec | 15 | 21 | 10 | 11 |
| Year | 190 | 905 | 440 | 465 |
Book a roof survey at your Cwmbrân school
Lenzie Consulting Ltd arranges roof surveys for schools across Newport. Send the school postcode and a rough idea of the roof area, and the last twelve months of half hourly meter data if the school holds it. We come back with what the roofs can carry, what they would generate against your own consumption, and the funding routes open to a school.
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.
Cwmbrân school solar, answered
- Is there enough sun around Cwmbrân for this to be worth doing?
- The model gives 903 kWh a year for every kWp installed at this latitude, so a 320 kWp array comes out at roughly 289,000 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 Cwmbrân school waste its generation in August?
- 25.5 percent of the modelled annual output for Cwmbrân 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 your network operator. We model all three against your half hourly data before an array is sized.
- Is planning permission needed for panels on a school in Cwmbrân?
- Usually permitted development covers a roof array on a school, with prior approval from Torfaen 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.