Solar Panel Installation
MCS-certified domestic install, 3-6kW typical. 0% VAT through March 2027. Tier 1 panels, hybrid inverter, Smart Export Guarantee setup.
From £4,500Thinking about solar PV, a battery, or having an existing system cleaned or repaired in St Austell? We'll match you with a vetted local MCS-certified, RECC-registered installer covering PL25 and PL26 and the surrounding villages. 0% VAT on domestic solar and batteries until March 2027, honest payback figures, no high-pressure sales. Free, no-obligation quotes.
St Austell (PL25, PL26) spans the china clay country plus the coastal villages of Mevagissey, Pentewan and Charlestown — and the Eden Project's biomes are a permanent reminder of how seriously this part of Cornwall takes renewables. Solar work here is a real mix: post-war housing estates with straightforward south-facing pitches around St Austell itself, traditional cob-and-slate cottages in Mevagissey and Pentewan (structural surveys matter), modern barn conversions in Roche, Bugle, Foxhole and Sticker, and the constant flow of holiday lets along the coast where owners are offsetting summer-peak electricity bills. We connect homeowners and holiday-let owners with MCS-certified installers covering the full PL25–PL26 area.
Typical install times: 1-3 days domestic, 3-5 days for larger holiday-let or commercial systems. DNO applications (G98 post-notification or G99 pre-approval) go to National Grid Electricity Distribution — lead times around 4-8 weeks for G99. Coastal salt exposure is a real factor here: anodised aluminium mounting rails, stainless fixings and IP-rated isolators aren't optional within a couple of miles of the coast. Payback in this part of Cornwall: 8-12 years honestly, faster if you size a battery to peak summer consumption.
Getting a Cornwall MCS-certified solar installer to your St Austell address shouldn't be a fortnight of cold calls. Here's how it works.
Fill in the quick quote form. Tell us your St Austell postcode, roof type, the job (new install, battery retrofit, clean, repair, commercial, farm or holiday let) and rough timing.
We pair you with a vetted Cornwall MCS-certified, RECC-registered solar installer covering St Austell. Site survey arranged direct — usually within 1-2 weeks, faster for repairs.
Survey, written quote, G98 or G99 DNO application, scaffolding, install, commissioning, MCS certification and Smart Export Guarantee paperwork — all handled by your matched installer.
New solar install? Adding a battery? Need an existing system cleaned, repaired or expanded? We'll match you with a vetted Cornwall MCS-certified installer covering St Austell and the surrounding area.
MCS-certified domestic install, 3-6kW typical. 0% VAT through March 2027. Tier 1 panels, hybrid inverter, Smart Export Guarantee setup.
From £4,500Tesla Powerwall 3 (13.5kWh), GivEnergy 5.2-13kWh, Enphase IQ Battery. Hybrid or AC-coupled. Retrofit to existing PV or new-build.
From £5,500Coastal grime, bird droppings, lichen reduce yield by 5-15%. Pure-water reach systems, annual cleaning recommended for coastal Cornwall.
From £75/visitInverter replacement (typical 10-12 yr lifespan), microinverter swaps, DC isolator failures, fault diagnosis with written report.
From £150 diagnosticHotels, holiday let portfolios, offices, retail, warehouses. 5-8 year ROI typical. G99 grid connection and AIA tax relief handled.
Bespoke quoteAgricultural barn roof and ground-mount installs. AIA-eligible plant and machinery. Diversification income for Cornwall farms.
Bespoke quoteOffset guest electricity, EV-charger integration, SEG export income on summer-peak generation. Strong fit for Cornwall self-catering.
From £4,500Indicative installed prices for typical 2026 Cornwall jobs. Your matched MCS-certified installer gives a firm written quote after survey.
Entry-level MCS-certified PV install — 7-9 Tier 1 panels, string inverter, SEG setup. 0% VAT to March 2027.
Most common 2026 spec — 10-12 panels, hybrid inverter, GivEnergy or equivalent battery. 0% VAT on full package.
13.5kWh Powerwall 3 fitted to existing PV — AC-coupled or hybrid inverter swap. App control, full home backup option.
Commercial roofs, holiday parks, farms. G99 DNO application included. AIA tax relief and 5-8 year ROI typical.
The most common questions about going solar in St Austell and the surrounding area.
Typical installed prices in St Austell (with 0% VAT on domestic until March 2027): 3kW domestic from £4,500-£6,500. 4kW + 5kWh battery from £9,500-£13,500. 6kW + 10kWh battery from £12,500-£17,500. Tesla Powerwall 3 retrofit from £8,500 fitted. Commercial 30kW+ systems are bespoke with G99 DNO application included. Always get 2-3 written quotes — prices vary between installers.
Yes, with honest expectations. Cornwall yields ~1,000-1,080 kWh per kWp per year — slightly above the UK average thanks to southerly latitude and Atlantic openness. Honest payback in St Austell: 8-12 years for domestic without battery, 7-10 years with battery if you maximise self-consumption, 5-8 years for commercial. Anyone quoting 4-5 year domestic paybacks is misleading you.
The main UK incentives in 2026: 0% VAT on domestic solar and battery installs (in force until 31 March 2027 under HMRC VAT Notice 708/6); Smart Export Guarantee, which pays you for electricity exported to the grid; and for businesses, Annual Investment Allowance — 100% first-year capital allowance on plant and machinery (subject to the AIA cap). Farms can use AIA-eligible solar as a diversification income.
The Smart Export Guarantee (SEG) launched January 2020 — energy suppliers must offer export tariffs to MCS-certified solar generators. Standard fixed rates run 4-15p/kWh; Octopus Flux and similar time-of-use tariffs can pay 25-30p/kWh at peak with a battery. To qualify, you must use an MCS-certified installer and be covered by RECC or HIES.
On-site work is typically 1-3 days for a 4-6kW domestic install in St Austell: scaffolding day 1, panels and inverter day 2, commissioning day 3. Pre-install, allow 4-8 weeks for the G99 DNO application if the system is above 3.68kW per phase (G98 covers up to 3.68kW single-phase). National Grid Electricity Distribution is the Cornwall DNO.
Usually yes. Slate roofs are common in Cornwall and a competent MCS installer fits a slate-specific mounting kit. Granite, cob, thatch and historic stone structures often need bespoke survey — sometimes ground-mount or barn-mount is cleaner. Listed buildings need listed-building consent before any roof work; conservation-area properties with front-elevation visibility (parts of Truro, Falmouth, Penzance, St Ives, Mousehole) may need planning.
Usually no — domestic roof-mounted solar in St Austell is normally permitted development in England. Exceptions: listed buildings (always need listed-building consent), AONB properties in some cases, and conservation-area sites with front-elevation visibility. Ground-mount and farm-mount installs above set thresholds need full planning. Your MCS installer will confirm before commissioning.
Only MCS-certified installers can issue the certificates needed to register for the Smart Export Guarantee, and MCS is also required for the 0% VAT zero-rate scheme on domestic solar. All installers we match you with in St Austell are MCS-certified under the Microgeneration Certification Scheme and signed up to RECC (Renewable Energy Consumer Code) — both are required for SEG eligibility and proper consumer protection.
Honest figures for St Austell: 8-12 years for domestic without battery; 7-10 years with battery if you maximise self-consumption (EV, heat pump, immersion); 5-8 years for commercial thanks to higher daytime self-consumption. Cornwall is good but not great — payback is real, just not the 4-5 year figure some national lead-aggregators promise. Octopus Flux or Outgoing tariffs (8-15p/kWh fixed, up to 25-30p/kWh peak with battery) accelerate the maths.
We cover St Austell and the surrounding villages across PL25 and PL26, including Mevagissey, Pentewan, Charlestown, Roche, Bugle, Foxhole, Sticker and Tregony. If you're not sure whether your address is in our patch, submit a postcode through the form and we'll confirm within a working day.