Commercial solar in Manchester and Lancashire

Royal Mail postal geography and local government geography were drawn for different purposes and they disagree constantly here. Trafford Park is M17, which reads as Manchester, and it has been part of the Metropolitan Borough of Trafford since 1 April 1974, so Trafford Council determines every application on it. Salford Quays and MediaCityUK are M50 and belong to Salford City Council, with the MediaCityUK site itself straddling the Salford and Trafford boroughs. Eccles, Barton and Irlam are M30 and M44 and are Salford. Denton and Audenshaw are M34 and are Tameside. Failsworth is M35, a Manchester post town inside Oldham Council. Airport City and the World Freight Terminal are M90, in the Woodhouse Park and Ringway wards, which are Manchester City Council wards, so the Altrincham postal town shown on some of those addresses is a postal convention and nothing more.

Two outward codes deserve real caution rather than a footnote. M24 at Middleton reaches into Bury, Manchester, Oldham and Rochdale, so an M24 postcode on its own places a site in none of them and every M24 address has to be checked individually. OL16 spans Rochdale and Oldham, so it is not a synonym for Rochdale. Further north, OL12 runs from Rochdale into Rossendale, which is a different planning authority in a different county, and OL15 at Littleborough reaches into Calderdale and sits across the network operator boundary as well, which is why this page does not claim OL15 wholesale. In the west, WN8 is a Wigan post town and lies entirely in West Lancashire district. M60 is not a place at all: its sectors are non-geographic, designated for large-user and post-box mail, and it should never appear in a list of districts anybody claims to serve.

The plan layer sits on top of the borough layer. Nine of the ten Greater Manchester districts, being Bolton, Bury, Manchester, Oldham, Rochdale, Salford, Tameside, Trafford and Wigan, adopted the Places for Everyone joint development plan document, which took effect and became part of each of their statutory development plans on 21 March 2024. Stockport is not one of the nine. So the strategic policy backdrop for a site in Trafford and a site three miles away in Stockport is not the same document, and a proposal that assumes it is has started badly.

SP Electricity North West (formerly Electricity North West) is the distribution network operator for every borough and every Lancashire town on this page, and anything above 50 kWp connects to it under a G99 application. It is a different company from Northern Powergrid, which is the operator readers on the Yorkshire side of this site deal with, and the check takes seconds: the distributor identifier here is 16, and that is the first pair of digits of the MPAN printed on your supply invoice. Do the check per site rather than per portfolio, because on the West Lancashire plain a single postcode district can be split between this operator and SP Manweb. Every generation acceptance at 50 kW or above also sits inside its Queue Management process with project milestones attached, so the connection is a programme item from week one rather than a formality at the end.

The Fast Track route exists here and nothing at this scale can use it. It is confined to small generation installations with low-voltage modules whose intrinsic design capacity is 32 A or less, and whose aggregate registered capacity across all power generating modules is 60 A or less, using type-tested G98 or G99 inverters. Sixty amps three-phase at 230 V is roughly 41 kW, which sits below the point this business starts at, so every project we work on in this territory needs a full G99 application with network studies behind it. That last piece of arithmetic is ours rather than published, and it is worth stating because it is the cleanest line between work above 50 kWp and the domestic and small-commercial installations that only ever meet G98.

Above the threshold the requirements step up in bands, and knowing which band a site falls in changes the programme. Where an installation is greater than 150 kW and part four of the G99 standard application form cannot be completed at the point of applying, part four is required after acceptance and before energisation. Generation applications over 200 kW are requested to include a letter of authority from the land owner, which is requested rather than mandatory but is still a genuine gating item on a leased industrial unit. Over 1 MVA, part four has to be fully completed at application stage and both a letter of authority and heads of terms are required. At 1 MW and above the acceptance is submitted to National Grid, and the operator has been converting its grid supply point interfaces from the Statement of Works process to the Appendix G process.

Before any of that there is a pre-application step worth taking. The operator publishes an indicative heatmap of capacity at its primaries and bulk supply points, carrying its own caveat that it cannot replicate the detailed assessment made during a formal application, and it asks customers to open a dialogue before applying. We treat that as a shaping exercise rather than an answer. Where the network cannot support a connection as applied for, the choices are paying for reinforcement or accepting a managed connection, and both are better discovered in week one than in month six. Our guides on the G99 application, the connection queue and G100 export limitation set out what each stage asks for.

Trafford Park was bought for development in 1896 and became the first planned industrial estate in the world. It is still described as the largest in Europe, and Trafford Council’s own inward investment service puts more than 1,300 businesses and 35,000 employees on it. A study commissioned by that council identified potential to generate 147 GWh a year from rooftop and carport mounted panels across the park alone, set against 714,000 tonnes of carbon emitted there each year. Whatever else is arguable about the region, the roof area on this one estate is not.

What makes it interesting to design on is the era range. A single estate holds sheds put up before the Second World War, post-war manufacturing stock, 1980s and 1990s distribution units, and buildings finished in the last three years, often within a few hundred metres of each other. Two consequences follow. On anything predating 1999 the sheeting and the structure decide the project before the electrical design does, and asbestos cement is a survey question rather than an assumption; our guide on solar on older and asbestos roofs covers how that is handled. On the newest stock the opposite question applies.

The assumption that new build here arrives fully fitted does not survive contact with the evidence. The flagship speculative scheme at Ashburton Point, a 150,000 sq ft development of which the warehouse element is 135,000 sq ft, was delivered to BREEAM Excellent and EPC A+ with 17,000 sq ft of panels on the roof. That is roughly an eighth of the available plane. Developer arrays on schemes like this are sized to hit an EPC and a BREEAM credit rather than to fill the roof or to match whatever the eventual occupier turns out to draw. So a modern, well specified, already partly fitted building is frequently still an extension prospect above 50 kWp, and an occupier whose load has grown past the developer’s array is one of the better conversations available on the estate.

Two honest deductions. Much of the park is multi-let estate of small units where no single tenant’s weekday demand absorbs 50 kW, so the workable schemes there are landlord-side across a whole terrace. And a major fire broke out on the estate on 24 April 2026, with the affected buildings not established here, so any site record older than that date is worth confirming before it is relied on.

Strip out everything that is really Trafford or Salford and what remains inside Manchester City Council’s own boundary is a smaller market than the headline suggests, but a real one. In the south, Wythenshawe carries two established industrial areas. Sharston sits in M22, fronting Sharston Road and reached from junction 2 of the A560 where it links with the M56, about three miles from the airport, with the estate’s sectors named after letters of the Greek alphabet. The occupier mix is third-party logistics, waste handling and liquid polymer processing, plus a bus depot, and depot electrification is quietly the strongest load story on it: a fleet charging operation adds large, growing, partly daytime demand under a single roof and a single supply.

Roundthorn in M23 spans Southmoor Road, Floats Road, Ennis Close, Greeba Road and Ledson Road, with marketed accommodation from 5,496 to 45,283 sq ft and its own Metrolink stop. The units at the top of that range are straightforward candidates and the ones near the bottom are not, before rooflights and setbacks are deducted. One correction is worth making because the opposite is widely assumed: this is not a single-owner estate. At least two separate institutional owners hold interests across it, so ownership has to be established terrace by terrace before an estate-wide proposal is put to anybody.

East Manchester is the part a page titled Manchester can most credibly claim. The industrial estate on Crabtree Lane at Openshaw in M11 sits on Ashton New Road, under two miles from junction 23 of the M60 and a short walk from the Edge Lane Metrolink stop, and last-mile urban logistics on steel portal frames with profiled metal decks is the easiest structural case in the city for lightweight rail-mounted arrays. Central Park on Northampton Road in M40 is a different proposition: capacity for more than 1.4 million sq ft of mixed-use floorspace delivered from 2001, hosting Greater Manchester Police’s force headquarters and a divisional headquarters. Those are offices rather than sheds, so roof area per unit of demand is poor, but an emergency services headquarters runs a continuous high base load, so essentially every generated unit is used on site at the retail rate rather than exported at wholesale. Expect low hundreds of kWp per building and a public procurement route rather than a direct sale.

Salford’s useful roof stock sits west of the city, along the Manchester Ship Canal, and it gets better the further out you go. Northbank at Irlam in M44 occupies the former Irlam steelworks site on the north bank of the canal, across Irlam Wharf Road, Huntsman Drive, Brinell Drive and Omega Drive, and carries recent detached warehouse units of 40,638 and 65,604 sq ft alongside a good deal of 1980s and 1990s stock. Wine bottling operates on a large site in the town. Process operations of that kind run load through the working day, which is the demand shape a large array needs; a pure storage or parcel operation on the same estate may not be, and half-hourly data settles it rather than the building type.

At Barton-upon-Irwell in M30, roughly six miles west of the city centre, the intermodal freight terminal opened in 2016 with a built distribution unit of 280,000 sq ft, ambient contract logistics with 45,000 pallet spaces and 30 loading doors. A single occupier box of that size is one of the largest continuous roof planes in the conurbation. The constraint there is commercial rather than technical: a canal-side asset held by a major landowner and let to a national operator puts the decision with a corporate estates team, and further phases described in marketing are not built.

Salford Quays and MediaCityUK in M50 are the borough’s best known commercial address and among its least suitable rooftop stock, which is worth saying plainly. Broadcast and technical buildings carry very high, flat, round-the-clock demand on comparatively small roof footprints, and much of the flat roof that exists is taken by chillers and condensers. More decisively, the estate generates on site through its own energy centre and distributes over its own network under a separate operator, so a photovoltaic proposal there is not a straightforward G99 at all; it becomes a negotiation with the estate scheme about how new generation interacts with existing dispatch and with that network’s own connection terms. That is a slower and materially different project than a single-occupier shed.

One network fact belongs here because it is easy to misread. A live reinforcement programme centred on the Frederick Road substation is installing three 75-tonne 132,000-volt transformers and replacing older oil-filled underground cables at Agecroft and Duchy Road, with the cable work due to complete by November 2026 and the substation upgrades by December 2027. The stated driver is rising demand from electric vehicles and heat pumps. It is demand-led reinforcement, and demand-led reinforcement does not automatically create export headroom for generation, so treat it as good news about import capacity and neutral news about your export position.

M90 is the clearest single illustration of this page’s argument. The district covers Manchester Airport, Airport City and the World Freight Terminal, some of those addresses show Altrincham as the postal town, and the land sits in the Woodhouse Park and Ringway wards, both of which are Manchester City Council. So the determining authority is Manchester City Council, not Trafford, and a pre-application enquiry sent to the wrong council is a fortnight lost before anything technical has been discussed.

The building stock is genuinely good on paper. The large robotics fulfilment building at Sunbank Lane beside the M56 is a flat, high, largely daytime weighted load with a growing charging fleet attached. The freight terminal is single-storey handling sheds with flat and shallow-pitch roofs and round-the-clock operation, which means very high self-consumption and almost no reliance on export. Both are the sort of profile that makes an array above 50 kWp pay on imported units avoided rather than on units sold.

Then the aerodrome constraint, which is a real technical gate rather than a line in a risk register. A reflective array near an active airfield requires a glint and glare assessment, and inside the safeguarding zone it requires consultation with the airport operator. Apron-adjacent siting at the freight terminal makes both mandatory rather than advisory. That is workable, and it is modelled and consulted on rather than argued about, but it has to be in the programme from the start, along with the landlord position, because the airport operator controls the ground. One further honest point: occupiers of national scale at this location procure generation centrally, so the realistic route in is rarely a direct approach to the site.

Something consistent is happening on new stock across the outer boroughs, and it sets where the winnable work is. Recent Grade A estates are arriving with photovoltaics in the base specification. At Hollinwood Junction off junction 22 of the M60 the landlord lists solar panels among the estate amenities. At Broadway Central in Chadderton the estate page describes solar panels and charging points across the estate. In Stockport a new Grade A scheme at Bredbury publishes panels, heat pumps and charging on every unit. Read together, that is a market signal rather than a disappointment: the retrofit opportunity above 50 kWp is on the older and mid-age estates, and the competitive question is technical competence on an existing building rather than specifying panels on a new one.

The older and mid-age stock is where the volume sits, and each borough holds it in a different place. Chadderton in OL9 is Oldham’s main industrial concentration, a mature motorway-fronted estate about a mile from junction 21 of the M60 with the shallow-pitch portal-frame geometry this work suits, where at least one recent speculative pair publishes charging points and no solar. Rochdale’s is on the M62 itself. Bolton’s best roof is 2015 onwards off junctions 4 and 6 of the M61. Wigan’s strongest cases are food manufacturing and large-format distribution rather than estates. The covered-borough sections below take each in turn.

One engineering point cuts across all four, and it is the one most often discovered late. On a large modern shed the roof is rarely the binding constraint; the incoming supply is. A speculative warehouse of 369,251 sq ft at Broadway Green in Oldham publishes an incoming supply of 1 MVA against a roof plane that could physically carry several times that in panels. The design question on a building like that is not how many panels fit. It is what the connection will accept, whether export limitation under G100 is the answer, and whether a supply upgrade is worth its own programme. That is a question to ask in the first meeting, and it is answered from the meter and the application rather than from the roof.

Stockport is the one Greater Manchester borough that is not part of Places for Everyone, having withdrawn from its predecessor framework in December 2020, and that is not a technicality. It means the strategic development plan policies that apply to a site in Trafford or Salford do not apply here, and it means the borough is working through its own plan under external pressure. In September 2025 the Minister of State for Housing and Planning issued a local plan intervention directing the council to complete its Regulation 18 consultation by 24 December 2025 and to submit the plan for examination no later than 30 November 2026. The resulting draft plan runs to 2042 and proposes releasing 26 Green Belt sites capable of delivering 8,965 homes out of a stated overall supply of 16,400, after which more than 40 per cent of the borough would still be designated Green Belt. On a constrained borough that is the context any employment-land or ground-mount conversation sits in.

On the roofs, Bredbury at junction 25 of the M60 is the only part of the borough with real shed depth. Live listings there run to a single unit of 79,259 sq ft with 11.5 metre eaves under refurbishment, alongside units at 6 to 8.5 metre eaves, which indicates the shallow-pitch insulated metal deck geometry that suits a large array. Hazel Grove carries the borough’s heaviest single electrical load in an operating semiconductor wafer fab on Bramhall Moor Lane, where the demand case is unarguable and the roof is the problem: fab roofs are dense with chillers, scrubbers, gas lines and cleanroom air handling, and any work is governed by vibration and contamination control. The biscuit works on Wellington Road North has produced on the same site since 1917 and has a live capital programme running, so its roof is a multi-phase survey rather than one clean plane. At Cheadle Royal the honest answer is that the offices are weak on roof and the large surface car parks are strong on canopy, which matches a weekday office load precisely and pairs with charging.

Stockport also supplies the one thing this page cannot claim for itself: local evidence that arrays above 50 kWp get bought here. The council’s own trading company runs a waste and fleet depot at Bredbury carrying an array of a few hundred kilowatts across the main garage roof, a wash bay roof and car park canopies, with battery storage and a new substation, commissioned in 2023. A council leisure centre in the town centre carries a roof-mounted array of around 300 kWp installed the same year. Neither is ours, and neither is a prospect. They are proof that the borough’s public buyers have already specified this work at this scale, which is a more useful fact than a testimonial.

Lancashire does not organise itself into boroughs the way Greater Manchester does, at least not for this purpose. It organises itself into corridors, and the qualifying roof stock sits on them. The M65 runs east from junction 6 at Whitebirk through Blackburn, Darwen and Padiham to junction 9 at Burnley, and it is the manufacturing corridor: extrusion, polymerisation, paint mixing and filling, tissue converting, laser cutting and CNC machining, aerospace composites, automotive pressing and specialist anodising, all of which draw hard and steadily through the working day. Anodising in particular is among the most electrically intensive light-industrial processes there is, driven by DC rectifiers and heated baths.

The M6 and M61 spine is the second. The industrial cluster at junction 31A north-east of Preston, Buckshaw Village between junction 28 of the M6 and junction 8 of the M61, the vehicle assembly site at Farington and the food manufacturing estate at Moss Side hold the big-box and assembly stock. It is roof-rich and often load-light, so ambient distribution there pushes the case towards export while the manufacturing occupiers on the same estates are the better prospect. The third is Skelmersdale, which is a new town and reads like one: East and West Pimbo, East and West Gillibrands, Stanley Industrial Estate and the Statham Road corridor were laid out as a system rather than accreted over a century, and the borough’s qualifying roof is almost entirely in WN8.

Then the plain and the coast, which behave differently from all three. Growing, washing, grading, chilling and packing around Tarleton, Hesketh Bank and Burscough give one of the better self-consumption profiles in the county, with the caveat that glasshouses are not roof stock, so any assessment of the plain that counts glazed horticultural area as available roof is counting the wrong thing. On the Fylde coast the qualifying stock is narrow rather than absent, and it is worth naming precisely rather than padding: the airport business park cluster and Vicarage Lane in FY4, a food manufacturing site at Devonshire Road, two large factories at Fleetwood and a chemicals and polymer complex at Thornton-Cleveleys, with leasehold tenure dominant and most stock built between 1945 and 1990.

The operator boundary is not tidy in the west, and it is the one trap on this page that costs a fortnight rather than an afternoon. Ormskirk’s L39 district is split between two licensed operators: L39 1 tests as the operator this page names, while L39 5, L39 6 and L39 7 test as SP Manweb, and several other sectors are mixed. PR8 and PR9 are Sefton on a different operator again. At the far eastern edge, some outlying BD23 addresses beyond Skipton fall to this operator rather than to Northern Powergrid, which is the same trap running the other way. The rule is identical in every direction: confirm the distributor from the site’s own supply number rather than from the town, because an application sent to the wrong body starts the clock again. All four Skelmersdale sectors test as this operator without exception, which is not true of West Lancashire borough as a whole.

This operator also publishes more capacity data than most, and it is worth an hour before anything is committed. A heatmap tool, a workbook and a scrollable map give estimated spare capacity at every primary substation and bulk supply point across the 33 kV, 11 kV and 6.6 kV networks, broken down by technology, with generation, demand and storage headroom shown separately. Find the primary that feeds your site, then read the inverter-based generation row rather than the demand row.

Two warnings travel with it. The published values are the total capacity available to connections rather than the maximum size of any individual connection, which can be significantly less, and the estimate covers thermal loading, fault level and voltage step change while excluding 132 kV constraints and meshed networks. Some values are also clearly banded rather than measured, because the same headroom figure repeats identically across unrelated substations. Treat the tool as a screening step that tells you whether to worry, not as an answer, and enter into dialogue before applying. The finding that changes projects is usually on the other side of the meter, because generation headroom and demand headroom are different numbers and a primary with ample room for an array can have none at all for new load. That bears directly on any site planning fleet charging, electrified heat or new process plant alongside the array, and on battery storage, which is a separate application with its own answer.

One more published figure changes designs at sizing stage rather than after an offer arrives. The operator connects generation under 0.2 MW at low voltage as a rule, and between 0.2 MW and 7 MW at 11 kV or 6.6 kV, so a design pushing much beyond 200 kW should expect a high-voltage connection with the cost and programme that carries. Where the network cannot support what was applied for, its flexible product trades curtailment at constrained times for capacity sooner, which is the same trade our G100 export limitation guide sets out from the design side.

We are Leeds-based, we have no North West office, and we are not going to imply one. What we do have is a set of measured road distances, and they are shorter than most people expect. Rochdale’s big park at junction 21 of the M62 is roughly 31 miles, closer than parts of the Yorkshire coverage on this site, and Oldham’s estates run from about 31 to 38 miles. Salford is about 45, Trafford Park about 49 on the M621, M62 and M60, Stockport about 48 to 49, and Bolton 46 to 52 depending on the junction of the M61. Wigan is the far end at roughly 56 miles to the town and 61 to Ashton-in-Makerfield, though the eastern half of that borough is 9 to 14 miles nearer.

Those free-flow figures should not be planned against. The trans-Pennine section of the M62 and the M60 approaches are among the most congestion-prone stretches in the north of England, so a realistic door-to-door allowance is 1 hour 10 to 1 hour 45 for most of the conurbation, more in the morning and evening peaks and more again over the Pennine summit in winter. That is a judgement drawn from known conditions rather than a measured figure, and it is a real cost that falls on survey visits, snagging and any warranty callout rather than on the price of the equipment.

What it changes is how the work is organised rather than whether it is done. Every Greater Manchester site is a comfortable same-day return with several hours on the roof, so a survey is a planned visit rather than a drop-in. The drone flight matters more here than it does twenty minutes from the office, because a measured three-dimensional model means the second question gets answered from data rather than from a second crossing of the Pennines. Commissioning attendance and the first-summer check are diarised at the point of contract rather than assumed. And because there is no completed installation anywhere in the region to point at, the right thing to ask us for is the engineering: the survey, the model against your own consumption, the connection application and the design, not a local job count we do not have.