Solar across a mixed local authority estate

A local authority estate has no single load profile because it has no single building type. A leisure centre runs continuously. A depot runs early mornings and weekdays. Offices run nine to five, libraries run opening hours, and a community hall may be occupied a few evenings a week.

That variety is the defining feature of council solar. The technology is the same everywhere. The economics are not, and they range from very strong to clearly not worth doing on buildings that sit within a few miles of each other.

So the first piece of work is not design, it is triage. Rank the estate on metered daytime consumption, roof condition and remaining life, structural headroom, tenure, and local network constraint. Everything after that is delivery.

Leisure centres are almost always top of the list, because pool plant, ventilation and lighting create a heavy continuous load under a large simple roof. Depots come next, particularly where refuse fleet or van electrification is planned, because charging turns a modest site into a significant consumer.

Civic offices and larger libraries are moderate performers with a good weekday match but weak weekend and holiday consumption. Car parks are frequently overlooked and can be strong, since a canopy generates and supports public charge points on the same structure.

Small community halls, pavilions and low occupancy buildings usually do not justify an array on financial grounds alone. There can be perfectly good reasons to do them anyway, including community engagement and visible commitment, but those reasons should be stated as what they are rather than dressed up in a payback figure.

Public procurement rules govern how the work is bought, and for most authorities the practical route is a call off from an established public sector framework rather than a full tender for each site. That satisfies the rules, shortens the timetable and gives you pre agreed terms.

What that requires from you is a properly specified scope: roof areas, structural information, consumption data, expected system sizes and monitoring requirements. Getting that wrong is the most common cause of delay, and it is where an independent assessment before procurement earns its place.

NRG Solar sits before the procurement, not inside it. We assess sites, produce indicative figures and provide the technical information a compliant call off needs, then match you with a vetted installer where a direct route is appropriate.

Councils fund this in a small number of recognisable ways: central government decarbonisation funding where a round is open, prudential borrowing against the saving, capital receipts, and third party funded models where capital is unavailable. Funding rounds and their criteria change regularly, so an authority should confirm what is currently open rather than plan against a scheme name.

Social value obligations sit alongside the money. Most authorities weight local employment, apprenticeships and supply chain commitments in evaluation, and that is a legitimate criterion to apply when selecting an installer. It is one of the things we can screen the network against.

Declared climate commitments give the programme its deadline. On site generation reduces scope two emissions directly and produces measured data that stands up in annual reporting, which matters when the target has a date attached to it.

Authorities lease out a great deal of what they own: industrial units, shops, community buildings and offices. The roof belongs to the council, the electricity supply belongs to the tenant, and the saving therefore lands in the wrong place unless it is designed for.

The workable structures are the same as in any landlord and tenant situation. The council owns and operates the array and sells the generation to the tenant, or supplies landlord services only, or the array is installed at lease renewal with the terms adjusted. Each needs the metering settled before design, not after.

Where lease terms are short, it is usually better to defer the site than to build an asset with a twenty five year life against a three year certainty.