Renewable energy and battery storage for Northamptonshire businesses

What Northamptonshire businesses actually spend electricity on

Northamptonshire is not run as a single county council any more. The Northamptonshire (Structural Changes) Order 2020 abolished the county council and all seven districts on 1 April 2021 and replaced them with two unitary authorities: North Northamptonshire Council, covering the former Corby, East Northamptonshire, Kettering and Wellingborough areas, and West Northamptonshire Council, covering Daventry, Northampton and South Northamptonshire.

Both are growing quickly. Census 2021 recorded 359,500 people in North Northamptonshire, up 13.5 per cent on 2011, and 425,700 in West Northamptonshire, also up 13.5 per cent, against 6.6 per cent for England as a whole. That growth arrives as new warehousing, new production capacity and new grid load, which is why connection capacity, rather than roof space or budget, is now the binding constraint on a lot of local projects.

The commercial load profile here is distinctive. A large share of the county's floorspace is single-storey warehousing: big flat roofs, modest daytime base load per square metre, and sharp peaks from materials handling equipment charging and shift changeovers. Alongside it sits real manufacturing, including steel tube making at Corby, food production at Burton Latimer where Weetabix has manufactured since 1932, and precision engineering and electronics around Silverstone, all running continuous process load, refrigeration and compressed air. Both types of site buy electricity at somewhere between 25p and 45p per kWh depending on contract date and agreed capacity, and both are usually better served by moving energy in time than by adding more panels.

Estates across the county and the technology each one suits

Around Daventry the anchor is DIRFT at Crick, where an intermodal rail terminal sits alongside a large estate of big-box warehousing, with Drayton Fields and Royal Oak serving smaller occupiers in the town itself. At M1 Junction 15 near Roade, SEGRO Logistics Park Northampton is a 600-acre development whose 17-acre open-access rail freight terminal opened on 27 February 2026 after more than £80 million of investment, connecting to the West Coast Main Line through the Northampton loop and specified for up to 16 services a day. Buildings of that generation usually have roof structures and incoming supplies that take solar and storage without remedial work.

North of the A14, Corby's industrial base is spread across Earlstrees, Weldon North and Willowbrook and leans more to manufacturing than to pure distribution. Kettering's stock sits on Telford Way, Pytchley Lodge, Kettering Venture Park and Kettering Business Park. Wellingborough's main concentration is Park Farm, roughly a mile and three quarters due west of the town centre off the A45, with Denington and Finedon Road behind it. Further east, Warth Park at Raunds serves national distribution operators, while Thrapston, Irthlingborough, Higham Ferrers and Oundle carry smaller mixed estates. On the county's south-western edge, Silverstone Park sits on the Buckinghamshire border with around 90 companies working in advanced engineering, electronics and software.

Site type matters more than town when choosing technology.

• Large clear-span warehousing: solar sized to base load, then storage sized to the surplus, with export limitation where the local network is tight.
• Food and process manufacturing: storage and heat recovery first, because steady load absorbs generation readily but roof area rarely covers the demand.
• Fleet and last-mile depots: EV charging with active load management, drawing on stored energy rather than raising your agreed capacity.
• Multi-let trade and light industrial estates: landlord-side generation with a metered recovery arrangement, or a funder-owned PPA.
• Laboratories, offices and test facilities: heat pumps at a COP of 3 to 4, controls and submetering rather than large arrays.

Storage is the technology this county asks about most

Search demand across Northamptonshire skews towards battery and energy storage rather than generation alone, and the reason is structural. Solar on a warehouse roof peaks at exactly the point a logistics building is running lights, chargers and dock levellers rather than a full process load. Without storage, self-consumption on that kind of site sits at the lower end of the 55 to 85 per cent range, and the surplus leaves the building at export rates far below what you pay to import.

Storage closes that gap, typically lifting on-site use of your own generation into the 80 to 95 per cent band. Commercial systems in this county run from 30 kWh to 1 MWh, cost £20,000 to £500,000 installed, and pay back in around seven years on their own, faster when they are sized against an array you already have.

Sizing is where projects go wrong. A battery should be scaled from a year of half-hourly meter data against three things: the daily surplus the array actually produces, the size and duration of your evening peak, and the spread between your lowest and highest import periods. Scaling it to the roof instead produces an oversized asset that spends most of the year part-cycled. It is also worth settling the export position early, because a battery declared as non-export avoids competing for scarce distribution capacity and frequently connects a good deal sooner.

Where the two councils stand on carbon after 2025

North Northamptonshire Council declared a climate emergency in 2021. In 2025 it decided to align instead with the national statutory date, and its published position is now to become a carbon-neutral council by 2050. Its Carbon Management Plan continues, with reported measures including the conversion of more than 26,700 streetlights to LED and a gritting fleet fuel switch modelled at 1,606.97 tonnes of CO2 equivalent at 1,606.97 tonnes.

West Northamptonshire Council went further. Its cabinet considered proposals on 16 July 2025 to remove the council's local targets of net zero operational emissions by 2030 and net zero for residents and businesses by 2045, and that refocus was confirmed to progress following scrutiny in August 2025. The council notes that the government's wider target of net zero by 2050 still applies to the area.

The practical read for a business here is straightforward. Do not build a case on the assumption that either authority will fund or mandate your decarbonisation. Build it on your import tariff, your capacity charges and your own consumption, and treat policy as upside. In this county the pressure that actually moves projects now comes from customers: tender questionnaires, Scope 3 reporting requests from national retailers and manufacturers, and energy clauses in leases on newer units.

One local development does help. North Northamptonshire Council published its first Local Area Energy Plan in April 2026, becoming the first authority in the South Midlands to complete one, having appointed Urban Foresight in May 2025 and worked with electricity and gas network operators through an advisory group. Network operators increasingly use these plans when deciding where to reinforce, so a North Northamptonshire site now has a documented local evidence base behind it.

Connecting in the East Midlands: what G99 involves here

The distribution network operator for Northamptonshire is National Grid Electricity Distribution, working under its East Midlands licence. NGED holds four licence areas in total, East Midlands, West Midlands, South Wales and South West, across a service area of roughly 55,300 square kilometres, and it is the party that has to agree any generation or storage you connect. It is not your electricity supplier, and switching supplier changes nothing about the application.

G99 applies to generation and storage installations rated above 16 A, which is 3.68 kW, per phase. Up to about 50 kW three-phase or 17 kW single-phase, a fully type-tested system can use NGED's fast-track route. Above that you make a full application, classified as Type A from over 50 kW to under 1 MW and Type B from 1 MW to under 10 MW. Most commercial rooftop arrays in this county land in Type A.

NGED publishes guaranteed standards for its own response times. A budget estimate is due within 10 working days below 1 MVA and 20 working days at 1 MVA or above. A formal quotation for a generation connection is due within 45 working days at low voltage and 65 working days at high voltage, extra high voltage or 132 kV. Those are timescales for receiving an offer, not for the work being built, and any reinforcement identified in the offer carries its own programme on top.

Two things follow in practice. On constrained rural feeders in the north and east of the county, an export-limited design is usually accepted faster and more cheaply than a full export connection, and for a site that self-consumes most of its output the commercial difference is small. National connections queue reform is also still working through during 2026, so headroom that looks available today may be allocated by the time a late application is assessed. Apply early, with an accurate load profile, for the capacity you will genuinely use.

A modelled scenario for a North Northamptonshire production site

The following is a modelled scenario, not a real named client. It is a representative example showing how the figures behave on a site of this type, built from the cost and performance assumptions used across this site.

Take a 60,000 sq ft chilled food production and storage unit on an industrial estate between Kettering and Corby, drawing 1.45 GWh a year at a blended import cost of 26p per kWh. That is roughly £377,000 of electricity annually.

Efficiency comes first. Compressor sequencing, refrigeration controls, LED replacement, dock seals and better shutdown discipline plausibly remove 12 per cent of consumption, or 174,000 kWh, worth about £45,000 a year at a payback inside two years.

The roof then takes a 500 kWp array, occupying roughly 2,750 square metres at 5.5 square metres per kWp and generating about 475,000 kWh a year at 950 kWh per installed kWp. Standalone, on this load shape, that array would be self-consumed at roughly 70 per cent.

A 600 kWh battery rated at 300 kW lifts self-consumption to about 88 per cent, putting around 418,000 kWh into the building and exporting about 57,000 kWh. Valued at 26p for the units displaced, 5p per kWh under the Smart Export Guarantee for the exported units, and a 9p spread on a further 45,000 kWh charged off-peak and discharged at peak, the array and battery together are worth roughly £115,000 a year.

Capital cost lands near £375,000 for the array at £750 per kWp and about £300,000 for the battery, so £675,000 in total, giving a payback a little under six years. With the efficiency work included, the annual bill falls by around £160,000 from £377,000, a reduction of about 42 per cent.

Two caveats are worth stating plainly. The array and battery still only cover roughly a third of what the site draws once the efficiency work is done, so this reduces exposure to electricity prices rather than removing it. And because efficiency lowers base load, the battery should be specified after those measures are in place, or it will be sized against a demand profile that no longer exists.

What this costs around the county and how firms here fund it

Installed solar runs from £600 to £1,300 per kWp, and where a Northamptonshire project lands in that band is mostly a roof question. Newer units at DIRFT, at the Junction 15 park and on recent Corby and Raunds schemes tend to sit near the bottom, with purlins sized for modern loadings and adequate incoming supplies. Older stock on Earlstrees, Telford Way, Denington and parts of Park Farm dates from the 1970s and 1980s and can need a structural appraisal, occasionally sheet replacement, which pushes a project up the band.

The Annual Investment Allowance is the workhorse for funding. It gives a 100 per cent first-year deduction on qualifying plant and machinery up to £1 million a year, which covers the whole of the modelled project above and most single-site solar and storage schemes in this county. Where capital rather than return is the obstacle, a funder-owned power purchase agreement puts the asset on someone else's balance sheet and you buy the generated units at an agreed rate with no capital outlay.

Exported units earn 4p to 15p per kWh under the Smart Export Guarantee, and rates vary by supplier. For fleets, the Workplace Charging Scheme contributes £500 per socket for up to 40 sockets, at rates confirmed to run until 31 March 2027. The Industrial Energy Transformation Fund closed to new applications in July 2025 and was not extended after the Spending Review, so it is no longer a route for the county's food and metals manufacturers. The Public Sector Decarbonisation Scheme is limited to public bodies. The Boiler Upgrade Scheme is capped at 45 kW, so it rarely reaches a commercial heat pump load of the scale discussed here, and any quote that leans on it for a large industrial or warehouse site should be questioned.

Tenure is a county-specific complication. Park Farm, Telford Way, Earlstrees and Pytchley Lodge are substantially multi-let, so the party paying for an array is often not the party paying the electricity bill. A landlord-funded installation with a metered recovery arrangement, a green lease clause at renewal, or a PPA with the landlord as host all work, but the structure needs settling before design work starts.

• Commercial solar: 30 kW to 2 MW, about £25,000 to £1.5m, roughly six-year payback.
• Battery storage: 30 kWh to 1 MWh, about £20,000 to £500,000, roughly seven-year payback.
• EV charging: 7 kW to 350 kW, about £3,000 to £150,000 and above, roughly five-year payback.
• Heat pumps: 30 kW to 1 MW thermal, about £30,000 to £750,000, roughly eight-year payback.
• Energy management and efficiency: site-wide, about £2,000 to £100,000, roughly three-year payback.
• PPA and procurement: any scale, no capital outlay, funder-owned.
• Wind and CHP: 5 kW to 500 kW, about £40,000 to £1m and above, roughly nine-year payback.

A sensible order of work for a site in this county

We work UK-wide and cover both North and West Northamptonshire. We are MCS certified, OZEV approved, NICEIC Approved, a RECC member and TrustMark registered, and we install across five or more technologies so the recommendation is not tied to one product. Panels carry a 25-year performance warranty and the installation carries an insurance-backed workmanship warranty.

For an indicative sizing and payback on your site, send your postcode, a roof plan or satellite view, your MPAN and twelve months of billing data through the form on this page or our quote page, and we will come back with figures you can put in front of a board.

The sequence matters more than the shopping list. Doing it in this order stops you buying kit sized against a demand profile you are about to change.

• Measure. Pull twelve months of interval consumption from your supplier along with your MPAN and capacity agreement, and identify base load, peak periods and any capacity you are paying for but not using. Efficiency measures typically remove 8 to 25 per cent of consumption at a one to four year payback.
• Generate. Survey roof structure and orientation, size the array to base load rather than to available area, and settle the export position with NGED early. Roughly 5 to 6 square metres carries 1 kWp, yielding about 900 to 1,000 kWh a year in this part of England.
• Store. Size the battery against the daily surplus and the shape of your peak, not against the size of the array, and confirm whether the site gains more from self-consumption, peak avoidance or both.
• Electrify. Heat pumps suit space or process heat needed below about 80 degrees C, at a coefficient of performance of 3 to 4. Depot and staff EV charging should be load-managed so it draws from stored energy where possible.
• Fund. Confirm the Annual Investment Allowance position with your accountant, register for the Smart Export Guarantee with a supplier once commissioned, and consider a PPA only where capital is genuinely the blocker.