Solar Panels in Exeter: Costs, Output, and Local Guide

Does solar work in Exeter?

Exeter is an excellent solar location. Situated in Devon in the South West of England, the city sits within the NGED (National Grid Electricity Distribution) network and typically yields around 960–1,000 kWh per kWp per year — well above the UK average.

A 4kWp system in Exeter generates approximately 3,840–4,000 kWh per year, comfortably covering a typical household's annual electricity consumption and producing a meaningful export surplus.

Devon's south-westerly position brings strong sunshine hours, particularly from April through September. The region's relatively mild climate also means panels rarely experience the extreme temperatures that reduce efficiency.

How much does solar cost in Exeter?

Installed costs in Devon are competitive — broadly in line with the England average or slightly below. Expect to pay roughly £1,450–£1,600 per kWp, making a 4kWp system around £5,800–£6,400 installed.

Exeter's strong yield and competitive costs produce excellent payback periods — typically 7–9 years for well-sited homes. Adding a battery (typically £3,000–£4,500 for a 5kWh unit) can capture the significant summer surplus for evening use and further improve the return on investment.

Your electricity network: NGED (National Grid Electricity Distribution)

NGED — formerly Western Power Distribution — manages the distribution network across the South West, Midlands, and Wales.

For solar installations:

• Systems up to 3.68kW (single-phase): G98 notification — installer informs NGED within 28 days of commissioning, no prior approval needed
• Systems above 3.68kW (single-phase): G99 pre-approval required before installation — allow 45–65 working days
• NGED's online portal handles G98 and G99 applications

Typical Exeter system

Exeter's housing stock is varied: the city has a historic core with some listed and conservation-area properties; Victorian and Edwardian terraces in St Thomas, Heavitree, and St Leonard's; interwar and postwar semis across Pinhoe, Whipton, and Middlemoor; and newer detached estate housing on the city's expanding fringes.

System sizing guidance:

• Historic core / conservation areas: Some central Exeter properties may require planning permission for visible solar installations — check your property's status with Exeter City Council
• Victorian terraces: A 3–4kWp system is typical; rear-facing south or south-west roof slopes are common and well-suited to solar
• Semis: 4kWp suits most three-bedroom properties
• Detached: 4–6kWp depending on roof area — properties on the newer estates around Cranbrook and Topsham Road are particularly well-suited
• Devon's strong irradiance makes even east or west-facing roofs more productive than the same orientation further north

Local grants and schemes

Exeter homeowners may be eligible for:

• ECO4: Available to households on qualifying benefits or with a low EPC rating — active until December 2026
• Warm Homes Local Grant: Delivered through Exeter City Council and Devon County Council — check current availability
• Warm Homes Plan: Government successor to ECO4, expected to launch late 2026
• Smart Export Guarantee (SEG): Exeter's strong yield makes SEG export income meaningful — compare rates from licensed suppliers to find the best deal

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