solar panels for manufacturers in Portsmouth

Serving Portsmouth and the wider Hampshire area, including Gosport, Fareham, Havant.

Why Portsmouth’s manufacturers are looking at solar

Portsmouth sits in South East, and for every manufacturer across Hampshire the pressure is identical: industrial electricity prices have climbed steeply since 2021, and on a Portsmouth production budget power is now one of the largest costs a plant manager can actually influence. On-site solar suits Portsmouth manufacturers precisely because the demand profile is daytime-heavy; across Hampshire, process loads and lines run hardest under the midday sun a Portsmouth array captures. Most of what a Portsmouth array generates is consumed on site at your full import rate of roughly 22 to 32p, rather than exported for a few pence, and that is what makes the Portsmouth numbers work.

A typical Portsmouth manufacturer with 50 to 250 staff spends in the region of £38,000 a year on grid electricity, and larger Hampshire process sites spend several times that. Against that bill, on-site solar offsets 30 to 60 percent of annual demand on a single-shift Portsmouth operation and 70 to 90 percent on a continuous one, at a levelised cost of 4 to 7p per kWh versus the 22 to 32p Portsmouth industrial users pay the grid. We never size from roof area; every Portsmouth array is modelled from at least twelve months of your half-hourly meter data.

Portsmouth’s industrial geography

The manufacturing base around Portsmouth clusters into a handful of well-defined estates, and that is where the strongest rooftop solar opportunities sit. Locally that includes Lakeside North Harbour, Walton Road, Airport Industrial Estate, Voyager Park and Quartremaine Road, where portal-frame and profiled-metal-roof units offer the large, unobstructed roof areas a Portsmouth array needs. Manufacturers across Lakeside North Harbour and Walton Road typically carry the daytime process loads — machining, moulding, packing, refrigeration or process heat — that give solar its high self-consumption.

Beyond the named Portsmouth estates, the wider Hampshire footprint takes in Gosport, Fareham, Havant, Waterlooville and Southsea, and many Portsmouth manufacturers run production across more than one of those areas. We deliver consistent design, installation and reporting across the whole Portsmouth and Hampshire area, which matters when a customer audit wants group-wide renewable data rather than a single Portsmouth site.

The grid picture: connecting in Portsmouth

The Distribution Network Operator for Portsmouth is Scottish and Southern Electricity Networks, and in a Portsmouth solar project the grid connection is almost always the longest single item. A G99 application is required for any connection above 17 kW per phase — effectively every manufacturer-scale array in Portsmouth — and the Scottish and Southern Electricity Networks technical study alone commonly runs around 65 working days, with actual connection dates of 6 to 18 months on constrained parts of the South East network. We submit the Scottish and Southern Electricity Networks application on day one, alongside the Portsmouth structural survey, so the connection clock starts immediately. Where export capacity into the Portsmouth network will not arrive in time, we phase the design with battery storage so your Portsmouth site gets immediate self-consumption while the export agreement catches up.

Local cost, funding and a worked example

A 400 kW rooftop array on a Portsmouth-area manufacturer, sized to about 78 percent of peak daytime demand, would generate roughly 366,000 kWh a year, self-consume around 78 percent of it, and save in the region of £88,000 a year at current industrial grid prices, for a modelled simple payback near 6.4 years. In more detail, that 400 kW Portsmouth system is roughly 740 panels across about 2,200 square metres of clear roof, generating in the order of 366,000 kWh a year and displacing around 76 tonnes of CO₂. It is a representative figure; the real Portsmouth number comes from your meter data and your tariff.

The way a Portsmouth site pays for its array is the national picture with a Hampshire twist or two. Solar PV is special-rate plant and machinery, so it does not qualify for full expensing; the route is the Annual Investment Allowance, which expenses 100 percent of the first £1m of qualifying spend in year one and gives a limited company up to roughly 25 percent effective relief. Portsmouth also sits within reach of Solent Freeport, which can unlock Enhanced Capital Allowances for qualifying sites inside the designated zone — worth checking against your Portsmouth site boundary before you model the return. Energy-intensive Portsmouth sites holding a Climate Change Agreement improve their performance against target with every self-consumed unit while cutting Climate Change Levy and network charges. We model outright purchase, asset finance and a PPA side by side for your Portsmouth project. See our cost guide and grants and funding page.

Roof condition on Portsmouth’s industrial stock

The biggest technical variable on a Portsmouth site is usually the roof, not the panels. A good deal of the industrial stock across Lakeside North Harbour and Walton Road predates 2000, and pre-2000 Portsmouth roofs almost always need an engineer’s sign-off before any ballast or rail loading goes on. Some older Hampshire units still have asbestos-cement roofs, which will not take PV and have to be re-covered with a modern roof before any array goes on. That is often an opportunity rather than a blocker: because a 25-year panel warranty outlasts most new industrial roofs, the Portsmouth solar case can unlock a board-approved re-roof deferred for years, funded inside one capital envelope. Every Portsmouth project starts with a structural and roofing survey so none of this surprises you after contract.

Batteries, night shifts and red-band charges in Portsmouth

For most Portsmouth manufacturers on a daytime or single-shift pattern, self-consumption is already strong enough that a battery is a secondary optimisation. It becomes worth modelling where a Portsmouth site runs a genuine night shift, where Scottish and Southern Electricity Networks network charges load heavily into the DUoS red band, or where you want to trade flexibility. A battery lets a Portsmouth operator store daytime generation and discharge it into the dark hours or out of the expensive red-band window, and on some Hampshire sites it opens a flexibility revenue stream. We model the battery business case alongside the PV for every Portsmouth site rather than bolting one on by default.

Scope 2 reporting and Portsmouth’s supply chains

For a growing share of Portsmouth manufacturers, the trigger is not only the bill but the customer. Being part of high-value electronics, pharmaceuticals, aerospace and precision engineering means many Portsmouth and Hampshire firms sit in supply chains where an OEM, a national grocer or a large industrial buyer flows Scope 2 and Scope 3 requirements down to suppliers. EcoVadis, CDP Supply Chain and SBTi-validated targets increasingly appear as contract conditions. Every kWh of self-consumed solar cuts a Portsmouth site’s Scope 2 emissions and produces data that feeds those submissions, so for a Portsmouth manufacturer an on-site array is one of the cleanest, most verifiable ways to answer a customer audit and protect a contract.

Portsmouth City Council, Portsmouth Climate Emergency Plan and what it means

Portsmouth City Council has a 2030 net zero target, set out in Portsmouth Climate Emergency Plan. Solent Freeport status applicable. Naval and defence supply chain represents major commercial energy concentration. For a Portsmouth manufacturer that matters in two practical ways. First, planning: rooftop solar on a Portsmouth industrial building is generally Permitted Development under Class A Part 14 of the GPDO 2015, subject to the 200 mm projection limit and excluding listed or conservation-area properties, so most Portsmouth installs need no planning application. Second, procurement: as public bodies and large customers around Portsmouth tighten their own Scope 2 and supply-chain requirements, an on-site array is one of the most visible ways for a Portsmouth site to stay competitive on tenders.

Areas we cover around Portsmouth

We deliver solar panels for manufacturers across Portsmouth and the wider Hampshire area, including Gosport, Fareham, Havant, Waterlooville and Southsea, and out toward Southampton, Chichester, Bognor Regis. Each has its own council and net-zero commitments, and many of our Portsmouth clients run production across more than one of them. Whether you operate a single unit on one of Portsmouth’s industrial estates or a multi-site Hampshire portfolio, we model, install and report to the same standard.

Frequently asked questions about Portsmouth manufacturer solar

How long does a grid connection take in Portsmouth? Scottish and Southern Electricity Networks typically quotes around 65 working days for the technical study, with actual connection on constrained parts of the South East network running 6 to 18 months for installs above 100 kW. We submit the Portsmouth G99 application on day one and phase with battery storage where export capacity is delayed.

How much could a Portsmouth manufacturer save? It depends on your load, tariff and self-consumption, but as a representative figure for Portsmouth, a 400 kW rooftop array on a Portsmouth-area manufacturer, sized to about 78 percent of peak daytime demand, would generate roughly 366,000 kWh a year, self-consume around 78 percent of it, and save in the region of £88,000 a year at current industrial grid prices, for a modelled simple payback near 6.4 years. We model your exact Portsmouth number from your half-hourly meter data first.

Do we need planning permission in Portsmouth? In most cases, no. Rooftop solar on a Portsmouth industrial building is generally Permitted Development, subject to the 200 mm projection limit and excluding listed buildings and conservation areas. We confirm your Portsmouth site’s planning status in the feasibility study.

Get a free Portsmouth feasibility study

The starting point for any Portsmouth site is your half-hourly data and roof drawings; from those we return a costed Portsmouth feasibility study, with self-consumption and IRR modelled, inside seven working days. If the numbers work, our structural and electrical engineers visit your Portsmouth site for a single day before we issue a fixed-price proposal and a financial model your finance team can own. If your Portsmouth site does not suit solar, we will tell you so before you spend anything.