Tywyn sits on the mid-Wales coast in southern Gwynedd, with the Talyllyn Railway running inland into the Dyfi Valley. The LL36 postcode covers the town, Bryn-crug and the rural belt out towards Abergynolwyn. For solar PV the opportunity is driven by coastal irradiance, a substantial holiday-let freehold base, and a steady light-commercial estate along Station Road and High Street.
LL36 solar yield
PVGIS modelling for LL36 returns 945 to 970 kWh per kWp per annum for a well-oriented rooftop at 30 to 35 degrees pitch. The coastal position delivers strong summer beam irradiance, and long summer daylight hours extend useful generation well into the early evening. Expect 47,000 to 48,500 kWh per year from a 50 kWp array.
Holiday-let economics in Tywyn
Tywyn’s holiday-let market is material. For a typical three or four-bedroom coastal holiday let:
- Summer peak demand correlates closely with peak solar generation, which pushes self-consumption above 70 percent without batteries
- EPC uplift from a 4 to 5 kWp domestic array plus a 5 kWh battery can move a property from C to B, which is increasingly important for advertising visibility and future MEES compliance in the private-rented sector
- Payback typically lands at 7 to 9 years at current pricing and SEG export tariffs, faster where the property has an EV charger or heat pump to absorb generation
- Property value uplift is material in a holiday-let market where buyers scrutinise running costs
Planning
Tywyn sits outside Eryri National Park (unlike nearby Abergynolwyn which is inside), so the default planning regime is Gwynedd Council rather than Eryri National Park Authority. For rooftop PV:
- Permitted development applies to most domestic and commercial rooftops outside the Tywyn Conservation Area
- Inside the conservation area (centred on the church, the Corbett Square and the Talyllyn Railway station), full planning permission is required and officers will assess visual impact from the public realm
- Listed buildings require listed building consent in addition to planning
The Talyllyn Railway’s listed station buildings and the church are the main constraints. Most of the residential stock, holiday lets and commercial property in the town sits outside these constraints.
Grid connection
LL36 sits in SP Energy Networks licence area. G99 Type A application timelines for 50 kW to 1 MW commercial installs are broadly similar to NGED at 6 to 8 weeks. For small domestic installs under 3.68 kW per phase, G98 notification is same-week.
Distance and logistics
Tywyn is a three-hour drive from our Swansea base. For a holiday-let domestic install of 4 to 6 kWp plus battery, we typically deploy a two-person crew for two or three days. For larger commercial installs we batch trips across LL36, LL37 and LL40 where possible.
What a Tywyn holiday-let install typically looks like
A recent four-bedroom holiday let on the coastal strip: 5.2 kWp array on a south-east pitch, 10 kWh battery, inverter with integrated EV-charger readiness. Year-one generation 4,900 kWh against 5,050 kWh PVGIS estimate. EPC moved from C 72 to B 83. The owner reported a measurable uplift in listing visibility on the major holiday-let platforms in the following summer.
Starting the conversation
If you own a holiday let or small commercial property in LL36 and want a realistic assessment, call Paul direct on 01792 321123.
