Solar Together Dorset vs a Local Installer Quote: How Do You Compare?

If you live in Dorset and you've started looking into solar, you've almost certainly come across Solar Together — a council-backed group-buying scheme for solar that Dorset Council promotes. And you've probably also wondered how a scheme like that stacks up against a quote from a local firm. It's a fair question, and the honest answer is: you can't tell from the headline price alone. You can only tell by putting both offers on the same spec sheet and comparing them line by line.

Let's be clear about our position first, because we're often asked. Group-buying schemes are legitimate, and if one is running in your area it's worth getting a price from it — more quotes generally mean a better-informed decision. What we'd add is this: get a like-for-like quote from solar panel installers in Dorset at the same time, and compare the two on identical terms. We'll happily quote against any Solar Together offer, and we'd rather you compared properly than took either number on faith.

Start with the kit, because this is where most comparisons quietly fall apart. A cheaper headline can simply be a smaller system. Before you compare prices, write down for each offer: the panel brand and wattage, the total array size in kW, the inverter type, and the battery make and usable capacity (if a battery is included at all). Two quotes that are £1,500 apart can be describing systems that are thousands of pounds apart in what they'll actually generate and store. If any of those details aren't stated in a group-buy offer, ask for them in writing before you commit.

Next, ask who surveys your roof — and when. Does a surveyor look at your property before you commit to the price, or after? A quote produced without anyone assessing your roof orientation, shading, loft access and consumer unit is an estimate, not a firm price. Ask any provider, group-buy or local, what happens to the price if the survey turns up something the desktop quote didn't account for.

Then there's the grid paperwork, which matters more in Dorset than most buyers realise. Dorset is covered by SSEN, the local network operator. A small system (up to 3.68kW per phase) falls under G98, which is notified after installation. But most modern systems with a battery or meaningful export need G99 approval — and that has to be granted by SSEN before the install happens, not after. So ask both providers directly: who files the G98 or G99 application for my property, and at what point in the process? For our own customers, SCSS handles the SSEN application as part of the job. Whoever you use, don't let this be nobody's job.

Warranty and aftercare is the question that only bites years later. Ask each offer: who holds the workmanship warranty, who do I ring if the inverter throws a fault in year six, and is that company based near me? A phone number that's answered by the firm that actually put the panels on your roof is worth something. We're a family-run, MCS-certified installer based in Portsmouth on 02392 983 020, we cover Dorset as part of our south coast service area, and our 5.0 rating from 61 Google reviews is built largely on that aftercare. Whoever you choose, make sure the year-six phone call has a clear destination.

Ask about the install timeline too. Our typical installation takes one day. Ask any provider how long the wait is between committing and installation, and how long the install itself takes.

Then ask what happens if your roof needs extras. Scaffolding, a consumer unit upgrade, bird protection mesh — these are the classic sources of price creep. Ask whether they're included in the quoted price or billed on top. For reference, bird mesh is included in our prices as standard.

On price itself, we'd rather be transparent than mysterious. Our systems start from £4,995 for basic solar, from £6,995 for a budget solar-plus-battery package, from £8,418 for our standard system, and from £12,920 for our premium Tesla Powerwall 3 package (which currently carries a £375 rebate) — all "from" prices, subject to survey. A battery-only Powerwall 3 retrofit starts from £7,450. If you want to understand what drives the differences between those tiers, our solar panel cost guide breaks it down properly.

One thing that doesn't change between providers is the sunshine. Dorset gets roughly 1,050–1,150 kWh per kWp per year, so a 4kW south-facing system typically generates around 3,900–4,600 kWh annually — whoever installs it. The same goes for export earnings: Octopus's Outgoing tariff pays 12p per kWh (cut from 15p on 1 March 2026), and open-market SEG rates run roughly 10.5p–16.5p. Since generation and export rates are the same either way, the comparison really does come down to kit, price, paperwork and aftercare. To see what the numbers look like for your own roof, run it through our free solar calculator before you sign anything.

So here's the short version. Get the Solar Together price — it's a legitimate scheme and a useful data point. Then get a local quote on the exact same specification: same array size, same inverter class, same battery capacity. Compare who surveys and when, who files the SSEN paperwork and when, what's included versus extra, and who answers the phone after year one. If the group-buy offer wins on that full comparison, take it with our blessing. If you'd like the other column of that spec sheet filled in, we'll quote against any Solar Together offer — no pressure, just a like-for-like number to compare.