How much would a school roof near Barnsley generate?

Modelled at 839 kWh per kWp a year, a 400 kWp array on a Barnsley school models at about 335,600 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 Barnsley?

It goes somewhere, just not into the timetable. 26.3 percent of the Barnsley 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 Northern Powergrid, or a sign the array is too big. We test which before sizing anything.

Which network operator handles the connection at a Barnsley school?

Applications go to Northern Powergrid, who run the network across South Yorkshire. 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 Barnsley 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 Barnsley on siting and design. Listed buildings and conservation areas are the usual exceptions. We put the position to Barnsley before a design is finalised.

How many schools are there around Barnsley?

Barnsley has 92 open state-funded schools and colleges on the DfE register, with 34,586 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.

Specialist solar panels for schools in Barnsley

A kilowatt-peak on a Barnsley school roof models at 839 kWh a year, below the mean across the towns we cover, and the roofs it applies to are mostly carrying nothing. The survey records sheet type, remaining life, purlin spacing and the state of the incoming supply, and the model runs off your own meter data rather than an average.

335,600 kWh a year, modelled for a 400 kWp array on roughly 1,188 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 Barnsley

1 teaching block
2 hall and kitchen
3 sports hall
4 1960s block, no array
first phase
later phase

Drawing Illustrative estate, not a Barnsley school

Blocks 4, 3 with array

Array about 345 kWp

Yield about 289,000 kWh/yr

Frontage about 90 m / Rev A / S71

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.

Barnsley / South Yorkshire

A school on the edge of a West Yorkshire town, solar arrays on its roofs and walled fields rising to moorland beyond — School buildings of the kind we survey across Yorkshire and The Humber. Not a named school and not our work.

Solar PV for academy trusts across South Yorkshire

A one kilowatt-peak array on a shallow pitched roof in Barnsley models at 839 kWh a year, from modelled irradiation of 1,072 kWh per square metre in the plane of the array (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is about 5 percent below the mean across the towns we cover, so the case at this latitude rests almost entirely on using the output on site rather than exporting it.

Scaled up, a 400 kWp array, sized to what the nearest school scheme on record applied for, 26 miles away at Ashton-under-Lyne, models at about 335,600 kWh a year before shading, and needs roughly 1,188 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 88,300 kWh landing in July and August and roughly 15,100 kWh across December and January. Northern Powergrid 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.

FIG. 1 Barnsley against the rest of South Yorkshire

Doncaster856
Mexborough847
Barnsley839
Wombwell838
Rotherham835
Sheffield830

Barnsley ranks 3 of 6 towns we cover in South Yorkshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 830 to 856, a spread of 26 kWh per kWp. Within South Yorkshire that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.

Bars are zero based, so length is proportional to the figure. Where a county is flat, that is the finding: latitude is not the lever, the timetable is. Source: EU PVGIS v5.2, modelled per town

The planning position for Barnsley schools

The S71 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 Barnsley.

The closest recorded one is about 26 miles away at Ashton-under-Lyne: Tameside College, Beaufort Road, a 400 kWp roof mounted array applied for by Tameside College, which holds consent and is awaiting construction. We were not involved in it. We cite it because it is a public record of what has cleared planning in this part of Greater Manchester. Source: Renewable Energy Planning Database, Q1 2026.

Why demand in Barnsley falls as the roof peaks

The generating year and the school year are out of step in Barnsley. July and August carry 26.3 percent of the modelled output (EU PVGIS v5.2), and the site is closed for most of those nine weeks. July is the single strongest month here at 14 percent of the annual total, and it falls almost entirely inside the holiday.

At the other end of the year the mismatch flips. Only 4.5 percent of output falls in December and January, the two months when a Barnsley school is fully occupied and its heating and lighting are at their heaviest. The roof makes 6.5 times as much in July as it does in December, and August alone outproduces December by about 5.7 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 Barnsley 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 Barnsley 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 whole argument about term dates and the generation curve on the home page, and what it does to a payback figure under costs.

FIG. 2 A Barnsley roof against the English school year

generated while the school is open
generated at a weekend or in the holidays

The same figures as a table

Monthly output for a 1 kWp array in Barnsley, split by whether the day is a school session day. Across the year 48 percent of generation lands while the school is open.
Month	Session days	Output, kWh per kWp	School open	School closed
Jan	20	20	13	7
Feb	15	36	19	17
Mar	21	70	47	23
Apr	12	97	39	58
May	17	116	64	52
Jun	21	113	79	34
Jul	11	117	42	75
Aug	0	103	0	103
Sep	20	76	51	25
Oct	17	46	25	21
Nov	21	26	18	8
Dec	15	18	9	9
Year	190	838	406	432

Per kWp installed, month by month, separating generation while the school is open from generation at a weekend or in the holidays. 74 percent of the Barnsley year sits between April and September, most of which is term time; it is the tail of that period, the last week of July and all of August, that the school is not there for. The daily split is a flat apportionment of each month, not a metered one. Session days follow a typical English school year of 190 days. Your own trust or authority may differ by a few days either way. Source: EU PVGIS v5.2, session days from a typical school calendar

The school estate in Barnsley

Barnsley has 92 open state-funded schools and colleges on the DfE register teaching 34,586 pupils between them. Source: DfE Get Information About Schools.

The split is 77 primary, 11 secondary, 3 special and 1 further education, at an average of 376 pupils a site. At 7 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 Barnsley, 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.

Aerial view of a school site with teaching blocks of several different ages, a sports hall and a playing field, solar arrays on two of the flat roofs — A school site with blocks of several ages, which is the usual starting point for a trust estate survey.

Grid connection through Northern Powergrid

Northern Powergrid is the network operator here, and their answer on export capacity shapes the design. Any commercial array above 3.68 kW per phase connects under G99 rather than G98, and the application fixes what you are allowed to push back onto the network. If the local network is tight, limiting export rarely breaks the case here: most of the generation is consumed on site while the building is working.

Across South Yorkshire the planning database records 93 solar schemes totalling 1624 MW, of which 8 are operational (REPD Q1 2026).

Book the survey

Send us the school postcode

A survey in Barnsley starts with three things from you. Give us the postcode, the approximate roof area and, if you can get it from your supplier, twelve months of half hourly readings. What comes back is a usable area figure per block, output modelled against your own load rather than an average, and the ways a Barnsley school can pay for it.

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.

What Barnsley trusts ask before a survey

How much would a school roof near Barnsley generate?: Modelled at 839 kWh per kWp a year, a 400 kWp array on a Barnsley school models at about 335,600 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 Barnsley?: It goes somewhere, just not into the timetable. 26.3 percent of the Barnsley 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 Northern Powergrid, or a sign the array is too big. We test which before sizing anything.
Which network operator handles the connection at a Barnsley school?: Applications go to Northern Powergrid, who run the network across South Yorkshire. 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 Barnsley 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 Barnsley on siting and design. Listed buildings and conservation areas are the usual exceptions. We put the position to Barnsley before a design is finalised.
How many schools are there around Barnsley?: Barnsley has 92 open state-funded schools and colleges on the DfE register, with 34,586 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

All South Yorkshire locations