Specialist solar panels for schools in Southend-on-Sea
A school roof in Southend-on-Sea makes 6 times as much in July as it does in December, and the school year runs against that curve rather than with it. What we come back with is the usable roof area, the modelled output against your meter data, and the routes schools use to pay for it.
263,800 kWh a year, modelled for a 280 kWp array on roughly 832 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 Southend-on-Sea- 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.
School rooftop solar across Essex
A one kilowatt-peak array on a shallow pitched roof in Southend-on-Sea models at 942 kWh a year, from modelled irradiation of 1,206 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 280 kWp array, sized to what the nearest school scheme on record applied for, 6 miles away at Canvey Island, models at about 263,800 kWh a year before shading, and needs roughly 832 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 67,800 kWh landing in July and August and roughly 13,200 kWh across December and January. UK Power 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.
Southend-on-Sea ranks 4 of 10 towns we cover in Essex on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 908 to 973, a spread of 65 kWh per kWp. On a 500 kWp array that is about 32,500 kWh a year between the strongest and weakest town in the county.
What the planning record shows around Southend-on-Sea
The Renewable Energy Planning Database holds no school scheme for the SS2 postcode district. Read that as a gap in the record, not a gap in the roofs: the database is reliable above one megawatt and thin below it, and a school array is typically a fifth of a megawatt.
The nearest education scheme on the record is 6 miles from Southend-on-Sea, at Canvey Island: 280 kWp at Castle View School, Foksville Road, applicant Castle View School, which holds consent and is awaiting construction. That is someone else's application, not ours, and it is here because it shows what Essex planning has already accepted at an education site. Source: Renewable Energy Planning Database, Q1 2026.
The summer holiday problem for a Southend-on-Sea school
25.7 percent of the annual output modelled for Southend-on-Sea 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 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 Southend-on-Sea as anywhere else.
The weekly pattern repeats the annual one. Saturdays and Sundays generate as well as any other day and consume almost nothing, so before storage or export is even discussed it is worth knowing what the site does at a weekend, which only half hourly data will tell you.
The conclusion is not that a Southend-on-Sea 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 UK Power Networks to earn its keep.
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 | 25 | 16 | 9 |
| Feb | 15 | 40 | 21 | 19 |
| Mar | 21 | 75 | 51 | 24 |
| Apr | 12 | 109 | 44 | 65 |
| May | 17 | 127 | 70 | 57 |
| Jun | 21 | 130 | 91 | 39 |
| Jul | 11 | 131 | 46 | 85 |
| Aug | 0 | 111 | 0 | 111 |
| Sep | 20 | 87 | 58 | 29 |
| Oct | 17 | 53 | 29 | 24 |
| Nov | 21 | 32 | 22 | 10 |
| Dec | 15 | 22 | 11 | 11 |
| Year | 190 | 942 | 459 | 483 |
How many schools Southend-on-Sea has
Southend-on-Sea has 51 open state-funded schools and colleges on the DfE register teaching 31,125 pupils between them. Source: DfE Get Information About Schools.
The split is 33 primary, 12 secondary, 5 special and 1 further education, at an average of 610 pupils a site. That is 2.8 primaries for every secondary, which is the ratio that matters for a roof: a primary of a few hundred pupils usually offers a hall roof and one teaching block, while a secondary site carries a sports hall, a dining block and several flat roofs.
If your trust holds several of them, the sequencing question comes before the sizing question. Roof age, covering type and the state of the incoming supply vary block by block across an estate, and that is normally what sets the order of works.
Grid connection through UK Power Networks
UK Power Networks operates the distribution network across Essex, 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 Essex the planning database records 221 solar schemes totalling 2787 MW, of which 46 are operational (REPD Q1 2026).
Start with the Southend-on-Sea roof
We survey school and college roofs throughout Essex. We need the postcode, a rough roof area and your half hourly meter data if the trust has it. From that we model what the roof carries, what it generates against the timetable, and which of the funding routes actually suits a school of your size.
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.
Questions governors ask us about Southend-on-Sea schools
- Is there enough sun around Southend-on-Sea for this to be worth doing?
- The model gives 942 kWh a year for every kWp installed at this latitude, so a 280 kWp array comes out at roughly 263,800 kWh a year before shading. It needs about 832 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 Southend-on-Sea school waste its generation in August?
- 25.7 percent of the modelled annual output for Southend-on-Sea 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 UK Power Networks. We model all three against your half hourly data before an array is sized.
- Will the network around Southend-on-Sea accept the export?
- UK Power Networks is the distribution network operator for Essex. 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 Southend-on-Sea?
- Usually permitted development covers a roof array on a school, with prior approval from Southend-on-Sea 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 Southend-on-Sea?
- Southend-on-Sea has 51 open state-funded schools and colleges on the DfE register, with 31,125 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.