Specialist solar panels for schools in Ilkeston
Erewash has 46 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.
419,000 kWh a year, modelled for a 490 kWp array on roughly 1,455 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 Ilkeston- 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 Derbyshire
A one kilowatt-peak array on a shallow pitched roof in Ilkeston models at 855 kWh a year, from modelled irradiation of 1,092 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). Ilkeston sits 3 percent under our mean. Worth knowing, but not decisive: how well the array matches the timetable moves the answer further than the latitude does.
Scaled up, a 490 kWp array, sized to what the nearest school scheme on record applied for, 7 miles away at Derby, models at about 419,000 kWh a year before shading, and needs roughly 1,455 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 108,500 kWh landing in July and August and roughly 20,100 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.
Ilkeston ranks 4 of 8 towns we cover in Derbyshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 805 to 866, a spread of 61 kWh per kWp. On a 500 kWp array that is about 30,500 kWh a year between the strongest and weakest town in the county.
School solar on record near DE7
There is no school entry for the DE7 postcode district in the Renewable Energy Planning Database. The register is dependable for anything from a megawatt upward and incomplete below it, and a school array is usually nearer a fifth of a megawatt, so this says more about the threshold than about Ilkeston.
Look 7 miles out and there is one: Landau Forte College, Fox Street in Derby, 490 kWp, applied for by eEnergy Group PLC, which is with the planning authority. 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 Ilkeston generation curve
A Ilkeston school roof generates most in the weeks its buildings are closed. 25.9 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 14 percent of the annual total, and it falls almost entirely inside the holiday.
Winter reverses it. December and January between them return 4.8 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 6.3 times as much in July as it does in December, and August alone outproduces December by about 5.4 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.
Across the country the arithmetic settles at roughly 49 percent of output on a session day, against about 71 percent for a weekday business. That figure hardly varies by location, which is why the local numbers that matter here are the yield, the roofs and what has already cleared planning nearby.
And the week has the same hole in it. Two days in seven the site is closed altogether, at no cost to the generation, which is part of why the session day share sits where it does. Weekend lettings are the one lever a Ilkeston school has over that, and they are worth counting properly.
That argues for a particular shape of scheme rather than against one. Size to the load that does not stop at the end of term, count in lettings, holiday clubs and summer works honestly rather than optimistically, and then decide whether storage or an export arrangement with National Grid Electricity Distribution pays for the surplus that is left.
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 | 22 | 14 | 8 |
| Feb | 15 | 36 | 19 | 17 |
| Mar | 21 | 70 | 47 | 23 |
| Apr | 12 | 99 | 40 | 59 |
| May | 17 | 118 | 65 | 53 |
| Jun | 21 | 115 | 81 | 35 |
| Jul | 11 | 119 | 42 | 77 |
| Aug | 0 | 102 | 0 | 102 |
| Sep | 20 | 78 | 52 | 26 |
| Oct | 17 | 47 | 26 | 21 |
| Nov | 21 | 28 | 20 | 8 |
| Dec | 15 | 19 | 9 | 10 |
| Year | 190 | 853 | 415 | 438 |
Grid connection through National Grid Electricity Distribution
National Grid Electricity Distribution operates the distribution network across Derbyshire, so the export application goes to them. Anything larger than 3.68 kW per phase falls under G99, which means an application before commissioning rather than a notification afterwards. A constrained network is not the end of a scheme. Capping export costs little when the building already absorbs most of what the roof produces.
Across Derbyshire the planning database records 144 solar schemes totalling 904 MW, of which 27 are operational (REPD Q1 2026).
Erewash schools, phase by phase
Erewash has 46 open state-funded schools and colleges on the DfE register teaching 14,672 pupils between them. Source: DfE Get Information About Schools.
The split is 37 primary, 6 secondary and 3 special, at an average of 319 pupils a site. A ratio of 6.2 to one tells you where the roof area is. It is not with the 37 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.
Book a roof survey at your Ilkeston 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.
Ilkeston school solar, answered
- How much would a school roof near Ilkeston generate?
- Modelled at 855 kWh per kWp a year, a 490 kWp array on a Ilkeston school models at about 419,000 kWh. What decides whether that is worth doing is how much of it the school uses itself, not the total. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- How does the school year affect a solar scheme in Ilkeston?
- It goes somewhere, just not into the timetable. 25.9 percent of the Ilkeston generating year lands in July and August (EU PVGIS v5.2), and a closed school still runs servers, comms, refrigeration and ventilation. What that base load does not absorb is either stored, exported under an agreement with National Grid Electricity Distribution, or a sign the array is too big. We test which before sizing anything.
- Which network operator handles the connection at a Ilkeston school?
- Applications go to National Grid Electricity Distribution, who run the network across Derbyshire. An export-limited offer usually still works for a school, because the summer surplus is the part you were least likely to be paid much for anyway.
- What does Amber Valley require for solar on a school building?
- Roof-mounted solar on a non-domestic building often falls within permitted development under Part 14 of the General Permitted Development Order, subject to limits on how far the panels stand proud of the roof plane and, above a threshold, to prior approval from Amber Valley on siting and design. Listed buildings and conservation areas are the usual exceptions. We put the position to Amber Valley before a design is finalised.
- How many schools are there around Ilkeston?
- Erewash has 46 open state-funded schools and colleges on the DfE register, with 14,672 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.