Solar panels in Holyhead

The Isle of Anglesey council area, which includes Holyhead, had 68,878 residents at the 2021 Census. Solar Cymru is an independent guide that refers solar enquiries to installers. We leave the fitting to others. We refer enquiries to MCS-certified installers.

Holyhead holds the top spot for yield among the Welsh towns we checked, so this page starts with the numbers. It then covers the island’s heritage rules, slate roofs and garden arrays.

The best yield we found in Wales

PVGIS gives about 1,050 kWh a year for each kWp on a south-facing roof at 35 degrees in Holyhead. A 4 kWp system therefore makes about 4,200 kWh a year on that basis. For comparison, the Welsh range runs from about 810 to 1,050. The model assumes 14% system losses, so real output depends on your roof.

Because weather worries are common, our article on whether panels work in Welsh weather uses the figures to answer them. East or west roofs make about 15 to 20% less than south, and our solar yield guide explains how to compare quotes.

Conservation areas and the heritage sites

Cadw’s data records 12 conservation areas across Anglesey. It names three for Holyhead: Holyhead, Holyhead Beach and Holyhead Mountain Village. On a house, roof panels often stay within permitted development. However, in a conservation area a wall that fronts a highway needs planning permission.

The Isle of Anglesey County Council also publishes a World Heritage Site page. It covers the Castles and Town Walls of King Edward in Gwynedd, inscribed in 1986. The page says protection works partly through the planning system. The same wall rule applies in a World Heritage Site. Check the council’s register for Article 4 directions, because they can remove permitted development rights. Our planning permission guide covers every exception.

Slate roofs

If your roof is slate, fixings matter. MCS rules say brackets must not put load on slates unless a certified design spreads the weight. Installers must flash tiles or slates so gaps stay no larger than before. One manufacturer advises professional slate roofers.

Ask for the bracket details in writing. Our article on slate roof fixings covers the questions to ask. If the roof has a warranty, the installer should also check that panels will not void it.

Garden and ground-mounted arrays

The rules for a house garden are tight, because they cap height and area. There can be only one array, and no part may rise above 4 metres. Any part within 5 metres of the boundary may stand no higher than 2 metres. The panel surface may not exceed 9 square metres.

The array must also sit at least 5 metres from the highway. In a conservation area or World Heritage Site, the array may not stand between the highway and the house. However, beyond these limits you need planning permission. Our article on garden and ground arrays goes through the planning limits.

Network connection, bills and grants

In North Wales, the network operator is SP Energy Networks, through SP Manweb. Since boundaries can shift, confirm your address with the Energy Networks Association finder. Inverters up to 3.68 kW on a single phase follow G98, and your installer notifies the operator within 28 days. Bigger systems need the operator’s agreement first. Our grid and export guide covers export payments and metering.

A typical 4.5 kWp home system will cost roughly £6,500 to £8,800 installed. The VAT rate for home installations is 0% to 31 March 2027, with 5% due afterwards. Solar households typically save around £450 to £500 a year or more. Our funding guide covers Nest and Green Homes Wales.

Getting quotes in Holyhead

One enquiry through the quote form is enough, and Solar Cymru refers it to MCS-certified installers. Our solar panel installation page sets out the written design to expect. High yield shortens payback, but only a good design brings it.

Each nearby page lists its own local facts. You can also compare the pages for solar installers around Bangor, panels near Llandudno and quotes in Rhyl.