Southampton's housing is denser, smaller and older than most of Hampshire — the city council's own local plan describes a stock with more terraced housing and more pre-1919 property than average. That shapes every part of a renewables install here: roof area, scaffold access, where a heat pump unit can physically go. We're 6 miles up the road in Eastleigh.
A south-facing Southampton roof at around 35° generates roughly 1,080 kWh per year for every kWp installed — so a 4 kWp array lands near 4,320 kWh a year. That puts the city comfortably above the inland towns and a little below the open coast at Portsmouth and Chichester.
On a terrace with a 3.5m-wide rear slope, the limit is square metres, not irradiance. This is where higher-efficiency panels stop being a luxury: on a small roof, the difference between a budget panel and an Aiko ABC module can be a whole extra kilowatt. We size for the roof you have rather than quoting a standard 4 kWp system and hoping it fits.
| Town | kWh per kWp / year |
|---|---|
| Chichester | 1,175 |
| Portsmouth | 1,124 |
| Fareham | 1,117 |
| Bournemouth | 1,100 |
| Poole | 1,097 |
| Southampton | 1,080 |
| Salisbury | 1,046 |
| Winchester | 1,038 |
| Andover | 1,037 |
| Basingstoke | 1,031 |
| Guildford | 1,023 |
Source: European Commission PVGIS (v5.2), south-facing, 35° pitch, 14% system losses. Your own figure will differ with shading, pitch, orientation and roof area — the survey gives you a property-specific number, not this one.
Southampton City Council is the planning authority for the whole city — there's no National Park or National Landscape boundary to worry about here, which makes it simpler than Winchester or Chichester. The thing that catches people out is conservation area status, which reaches further into the suburbs than most residents realise.
Southampton's distribution network operator is SSEN — Scottish and Southern Electricity Networks, SEPD area. Which connection process applies decides whether your installation waits.
Southampton City Council describes the city's stock as "typically higher density and smaller than many authorities", with "a higher proportion than average of private rented accommodation, terraced housing and accommodation built before 1919".
Every part of that matters on site. Pre-1919 solid walls mean a higher heat loss figure, so a heat pump needs a genuine room-by-room calculation and often larger emitters rather than a rule-of-thumb sizing. Terraced rows mean scaffold access is negotiated through a neighbour's side passage or not at all. And a high rented share means the decision-maker is frequently a landlord, not the person living there.
Shirley, Bitterne, Portswood, Highfield, Woolston, Bassett, Totton, West End, Hedge End and the city centre. Every installation is MCS accredited.
Aiko ABC panels as standard — on Southampton's smaller roofs the efficiency gain converts directly into kilowatts you'd otherwise lose. We design around dormers, chimney stacks, valleys and the shading from the mature street trees that make the suburbs pleasant and the solar design harder.
Solar panels →Grant, Midea and Daikin. In pre-1919 stock the heat loss calculation is the whole job — get it wrong and no amount of good kit rescues it. We price emitter changes in rather than discovering them mid-install, and we're honest where a property needs fabric work first.
Heat pumps →Tesla Powerwall 3, Fox ESS and SigenEnergy. Batteries earn their keep hardest on constrained roofs: if the array is smaller than you'd like, storing what it does make and shifting cheap overnight rate into the peak recovers much of the difference.
Battery storage →About 1,080 kWh per year for every kWp installed, on a south-facing roof pitched at around 35 degrees, according to the European Commission's PVGIS dataset. A 4 kWp array works out at roughly 4,320 kWh a year. Southampton does better than the inland towns and slightly less well than Portsmouth or Chichester on the open coast. The bigger constraint in the city is usually roof area rather than sunlight, which is why panel efficiency matters more here than it does on a large detached roof.
Usually not. Roof solar on most Southampton homes is permitted development. The exception is the city's 20 conservation areas, where panels on a wall or roof slope that forms the principal elevation and fronts a highway need a planning application to Southampton City Council. Those areas include the three Old Town areas, Carlton Crescent, The Avenue, Uplands Estate in Highfield, Bassett Green Village, Portswood Residents' Gardens and Old Woolston. Listed buildings, of which the city has over 450, need listed building consent separately.
Yes, and we do it regularly, but two things decide whether it is worth it. The first is usable roof area: a narrow rear slope may only take six to eight panels, which is where higher-efficiency modules earn their cost. The second is scaffold access, which on a terrace often means routing through a neighbour's side passage. We check both at survey and price accordingly rather than quoting a standard system and discovering the problem on installation day.
Often yes, but it depends on a proper heat loss calculation rather than a rule of thumb. Southampton City Council describes the city's stock as having a higher proportion than average of accommodation built before 1919, and solid walls lose heat faster than cavity walls. That usually means larger emitters so the system can run at a low flow temperature. We survey room by room and price any emitter changes into the quote. Where we think a property needs fabric improvements first, we say so.
Not without your landlord's agreement, because the installation is fixed to the building and the grid connection is registered against the property. Southampton has an above-average private rented share, so this comes up often. We are happy to quote landlords directly, and we can supply the figures a landlord needs to weigh it up, including the effect on the property's EPC rating.
Southampton's distribution network operator is SSEN, in the SEPD area. For systems up to 3.68 kW per phase the G98 process applies and there is no wait: we install and then notify SSEN within 28 days of commissioning. Above that, a G99 application must be approved first, with SSEN carrying out a network study and issuing a connection quote. SSEN also requires prior approval where the same installer has connected generation at another property in the same postcode area within the previous 28 days, which on a dense terraced street comes up more often than you would expect.
Required to claim the BUS grant and to register for the Smart Export Guarantee. We are also RECC members.
Southampton is our nearest city. Our engineers are in it every week, not dispatched from a regional hub.
Family-run, with directly employed engineers. The people who survey your property are the people who install.
Survey to sign-off in one price, including scaffolding and the grid application. No hidden extras.
We will measure your roof properly, work out what it will actually generate, check whether you are in one of the city's conservation areas, and tell you honestly if a heat pump needs fabric work first.
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