Solar Panels in Witney, Oxfordshire

A 3-4kWp system in Witney typically costs £5,000-£8,000 with 0% VAT included — the zero-rate VAT alone saves around £1,000 compared to the standard 20% rate. Based on Witney's solar yield of 952 kWh/kWp, a 4kWp system generates approximately 3,808 kWh/year, paying for itself in 6-8 years through electricity savings of £1066+/yr and Smart Export Guarantee income of 4-6p/kWh. Adding a home battery (5-10 kWh) costs an additional £3,000-£6,000 and also benefits from 0% VAT. We recommend getting at least three quotes from MCS-certified installers to compare pricing and equipment.

The Smart Export Guarantee (SEG) is a UK government scheme that requires licensed energy suppliers with 150,000+ customers to offer a tariff to small-scale generators for surplus electricity exported to the grid. Typical rates are 4-6p/kWh, with some suppliers offering up to 15p/kWh on time-of-use or agile tariffs that pay more during peak demand. You need a smart meter and an MCS-certified installation to be eligible. Your energy supplier will install a smart meter for free if you do not already have one. The SEG replaced the Feed-in Tariff scheme, which closed to new applicants in 2019.

With a cost of £5,000-£8,000 (0% VAT included) and savings of £1066+ per year based on Witney's solar yield of 952 kWh/kWp at current electricity rates of 28p/kWh, plus Smart Export Guarantee income of 4-6p/kWh for surplus electricity, a typical solar system in Witney pays for itself in 6-8 years. Oxfordshire ranks #19 of 102 UK counties for solar yield — above the national average. After payback, you benefit from 17-22 years of near-free electricity as panels last 25-30 years. Adding a battery extends self-consumption and can reduce payback further if you use most electricity in the evenings. Total lifetime savings typically reach £15,000-£25,000 depending on your usage pattern.

Based on PVGIS satellite data for Witney's coordinates, a 4kWp system generates approximately 3,808 kWh per year at a yield of 952 kWh/kWp, covering 100% of average household use (3,800 kWh/year). The area receives around 1,550 sunshine hours annually. Oxfordshire ranks #19 of 102 UK counties for solar yield — above the national average. Output peaks between May and August and is lower in winter, though annual generation figures already account for this seasonal variation. South-facing roofs at a 30-40° pitch achieve optimal yields, while east or west-facing roofs still produce 80-85% of maximum output.

Most homes in Witney benefit from a 3-6 kWp system. A 4kWp system (10 panels at ~400W each) generates 3,808 kWh/yr at Witney's yield of 952 kWh/kWp, covering 100% of average household electricity use. The system requires approximately 18-20 m² of unshaded roof space. If you have an electric vehicle or heat pump, a larger 5-6 kWp system (12-15 panels) may be more appropriate to offset the additional demand. Your MCS-certified installer will assess your roof space, orientation, shading, and electricity consumption to recommend the optimal size during a site survey.

Yes. East or west-facing roofs still produce 80-85% of the output of a south-facing roof, making them well worth installing. Many installers recommend splitting panels across east and west faces to spread generation throughout the day, which can improve self-consumption and reduce the amount of electricity exported at the lower SEG rate. East-facing panels generate more in the morning, while west-facing panels peak in the afternoon — both align well with typical household usage patterns. Only north-facing roofs are generally unsuitable for solar in the UK.

Solar PV panels generate electricity from sunlight using photovoltaic cells, while solar thermal panels heat water directly using the sun's warmth. For most UK homes, solar PV is the better investment: it is more versatile (powering all electrical appliances), benefits from 0% VAT, and you can sell excess electricity via the Smart Export Guarantee at 4-6p/kWh. Solar thermal only heats water and does not generate electricity or qualify for SEG income. Solar PV panels also last longer (25-30 years versus 15-20 for solar thermal) and have lower maintenance requirements.