solar panels for holiday lets in St Ives

Serving St Ives and the wider Cornwall area, including Carbis Bay, Lelant, Hayle.

St Ives holds one of the most concentrated self-catering markets in the country, and its holiday lets have an energy profile that suits solar better than almost any home. A cottage above Porthmeor or in the Downalong warren earns most of its income and burns most of its electricity between April and October — exactly the months a Cornish array generates the most. That seasonal match is the whole reason to install here, and it is the opposite of a family home that sits dark all day and busy on dark winter evenings. If you own a holiday cottage, a coastal apartment or a lodge in or around the town, the case for solar panels for holiday lets rests on that overlap of peak occupancy and peak generation.

Why St Ives is unusually well matched to solar

Cornwall records some of the highest solar irradiance in the United Kingdom. The far south-west sees roughly 1,550 to 1,600 hours of sunshine a year, materially more than the Midlands or the North, and a well-oriented St Ives roof will out-generate the same array in Manchester by a comfortable margin. For a property whose diary is fullest in the bright months, that extra yield lands precisely when guests are in residence and the meter is spinning hardest. It also means the payback maths that competitors quote for an average UK home understate what a St Ives array actually delivers, because they neither price in the local sunshine nor the fact that your occupancy tracks the generation curve almost month for month.

The town’s visitor economy is enormous relative to its size. St Ives has a resident population of around 11,000, yet it draws several million day and staying visitors a year across the wider St Ives Bay and the Penwith peninsula, and self-catering is the dominant accommodation type. A large share of the housing stock in the TR26 district is second homes and holiday lets — St Ives Town Council’s neighbourhood plan, adopted in 2016, was the first in England to restrict new-build open-market housing to principal residences precisely because holiday and second-home ownership had come to dominate. For a solar installer that means one thing: the buildings here are overwhelmingly let, and their owners think in terms of occupancy, changeover and running cost, not domestic bill-splitting.

Reading the occupancy curve against the generation curve

The single most useful thing an owner can do before sizing a system is overlay the booking calendar on the generation profile. A St Ives cottage typically runs high-eighties to near-full occupancy from late spring through the school summer holidays, holds strong through the September and October shoulder, quietens over winter and lifts again for the February half-term and Easter. A Cornish PV array follows almost the same shape: negligible in December and January, climbing hard from March, peaking June to August, tailing through the autumn. The two curves sit on top of each other. In practice that means the electricity you generate in the months that matter is electricity you are also using on site — the hot tub, the hot-water re-heat, the guest EV charging — so self-consumption in season runs high rather than exporting cheaply. Winter, when the cottage is quietest, is also when the array produces least, so there is little wasted generation; what surplus there is exports under the Smart Export Guarantee.

The hot tub is the load that pays for the battery

Guests booking a St Ives cottage now expect a hot tub, and it is almost always the single biggest electrical load on the property. A domestic hot-tub heater draws roughly 2 to 3 kW and, kept hot and filtered for back-to-back stays through the season, runs far more of the day than owners expect. Much of that demand is daytime heating and filtration a solar array can cover directly. The rest — the evening re-heat, the overnight hold, the changeover-morning surge when fresh linen, laundry and a full hot-water cylinder all land at once — is what a battery is for. Store the midday Cornish sun and release it after dark, rather than exporting it cheaply and buying it back at peak.

That is why, for a St Ives let, a battery usually earns its keep in a way it might not for an ordinary home. We size to the in-season daytime baseload — hot tub, hot-water re-heat, any guest EV charging — not to an annualised average. A cottage without a hot tub looks like a modest domestic system on a long payback; add the season-long tub load and a battery to time-shift it, and self-consumption and return both rise sharply. The sub-type detail sits on our solar panels for holiday cottages page.

Off the gas grid — every self-consumed kWh is worth more

Much of Penwith sits beyond the mains gas network. Many St Ives and Zennor properties heat on electric, oil or LPG, and the old granite cottages of the Downalong and Ayr quarters were never plumbed for gas. When your heating and hot water run on electricity, every kilowatt-hour the panels displace is worth the full electric unit rate, not a cheaper gas equivalent — which lifts the value of self-consumption and shortens the payback compared with an on-gas property. For an off-gas let, solar-plus-battery is doing more work per panel than the headline generation figure suggests, and it insulates a thin seasonal margin against the next electricity-price shock.

Planning: the conservation area and listed granite

St Ives is not in a National Park, but the historic core is a conservation area and the wider peninsula from Zennor westward falls within the Cornwall Area of Outstanding Natural Beauty. That matters for panel siting. Roof-mounted PV on a dwelling is usually permitted development, but not on a wall or roof slope fronting a highway within a conservation area, and the many listed granite cottages in the old town always need Listed Building Consent. The route through is discreet siting: panels on the seaward or rear roof pitch, out of sight of the narrow lanes, or a screened ground-mount where a garden allows. We provide the visual-impact detail Cornwall Council’s planners expect, and favour the sympathetic siting that gets a St Ives application through. Cornwall Council has declared a climate emergency and targets net zero for the county by 2030, so the policy wind is behind sensitive renewable installs — the constraint is heritage, not principle.

The old-town rooftops carry a second practical wrinkle: they are steep, close-packed and often overshadowed by higher ground behind, which changes the yield calculation from roof to roof. That is exactly why an off-the-shelf estimate does not travel well here, and why we model each property’s own orientation and shading rather than quoting a town-wide figure.

Salt air and a coastal specification

A St Ives array lives in a marine environment. Salt-laden air and Atlantic exposure argue for a coastal specification — marine-grade mounting and fixings and inverters rated for the setting — so the system does not corrode its way to an early failure two streets from the sea. It is a small detail that competitors quoting a generic domestic install routinely miss, and it is the difference between a 25-year asset and a warranty claim.

Grid on the peninsula

The far south-west sits at the end of the distribution network, and parts of west Cornwall carry known capacity constraints. A single small cottage array of 3.68 kW per phase or under is notified to the DNO under G98 (connect and notify); anything larger, and most battery-plus-EV systems, need a G99 application before connection. We check the local network position early rather than late, because on a constrained coastal feeder that is where a project’s timeline is really set.

Guest EV charging and green bookings

Guests increasingly drive to St Ives by EV and expect to charge, and a 7 kW home-style charger absorbing daytime solar is close to a perfect self-consumption match — the car soaks up generation that would otherwise export cheaply. A charge point is also a listing selling point that EV-driving guests actively filter for. On-site solar is auditable evidence toward a Green Tourism award too, which measurably helps direct and platform bookings in a town where sustainability increasingly features in guests’ choices. There is precedent for this working in the sector: a five-star self-catering operator near Dingwall in the Scottish Highlands cut its annual energy cost by over £19,000 with a mix of renewables including solar PV, and reports that guests actively prefer a green-energy provider — the Resource Efficient Scotland case study sets out the figures.

A worked example for a St Ives let

Take a converted fisherman’s cottage in the Downalong quarter, let year-round through Sykes and its own website, running a hot tub on the terrace and off the gas grid on electric heating. Fit a 5 kW roof array on the discreet seaward slope, out of sight of the street below, paired with a 10 kWh battery. Indicatively that covers the bulk of the April-to-October daytime hot-tub and hot-water load, time-shifts the rest into the evening for back-to-back changeovers, and exports the winter surplus under the Smart Export Guarantee. Indicative payback lands in the eight-to-ten-year range and improves further once guest EV charging is added. These are scoping figures, not a quote — a real design needs the property’s own consumption, roof orientation and shading.

A note on tax — take your own advice

The Furnished Holiday Lettings regime that once let holiday lets claim capital allowances on plant such as solar was abolished from 6 April 2025. If you hold your St Ives cottage personally, you can no longer write the panels down as plant and machinery; if it is held in a limited company, solar may still be qualifying plant and the company may be able to use the Annual Investment Allowance. It depends entirely on your structure, so take your own tax advice — we will not pretend the old allowances still apply, because they do not. The Smart Export Guarantee still applies cleanly: an MCS-certified system earns an export tariff on the winter surplus, and 0% VAT on qualifying domestic-scale solar and battery runs to 31 March 2027 in Great Britain, though its application to a purely commercial let is not clear-cut and should be confirmed.

Common questions

Is solar worth it for a cottage that’s only busy half the year?

Arguably more than for a year-round home. St Ives lets earn their income April to October, which is also the sunniest window, so in-season self-consumption is high. In winter the system exports under the Smart Export Guarantee, earning on power you would not have used anyway.

Can I get panels approved in the St Ives conservation area?

Usually, with care. The route is a non-highway-facing roof slope or a screened ground-mount, and listed granite cottages need Listed Building Consent. We provide the visual-impact detail Cornwall Council expects and favour discreet siting rather than a street-facing array.

Will the salt air shorten the system’s life?

Not with the right specification. We fit marine-grade mounting and fixings and site the inverter sensibly, so a coastal St Ives array reaches its full design life rather than corroding early. It is worth insisting on this when comparing quotes.

The wider Penwith peninsula

We install across the peninsula and the wider bay. If your let sits inland or along the coast, our nearest pages cover Penzance, Truro, Camborne, Carbis Bay and Hayle. Wherever the property is, we size to your occupancy and your hot tub, not a generic domestic profile.

Ready to see the figures for your property? Request a free quote and we will model your in-season load against the Cornish generation curve before you commit to anything.

One more question St Ives owners ask

Will installation clash with my summer bookings? It need not. Roof work on a domestic-scale array is a few days, and we schedule it into a changeover gap or the quiet winter so guests are unaffected, booking the brief final grid connection for an empty period. On a converted property split into flats we phase the work to keep part of it lettable throughout the peak season.