Why is it cheaper to install solar during a re-roof?

When you install solar while replacing your roof, you save in three ways: 1. You only pay for scaffolding once. 2. You don't pay for the roof tiles that the solar panels replace (saving ~£40/m²). 3. Labor is cheaper because the roof is already stripped, allowing for faster integration of systems like GSE or Marley SolarTile.

How long is the 0% VAT rate available?

The UK government has extended the **0% VAT rate** on energy-saving materials (including solar and batteries) until **March 31, 2027**. This saves the average homeowner over £1,500 on a typical 4kW system.

Do solar tiles generate as much power as panels?

Traditional monocrystalline panels (400W+) are slightly more efficient per square metre than solar tiles. However, because solar tiles can cover a larger percentage of the roof's surface area, the total energy yield is often comparable. Solar tiles are chosen primarily for their superior aesthetics in conservation areas.

The Future of Smart Roofing

Solar Integrated Costs 2026

By 2026, a roof replacement is no longer just a structural job—it's an energy investment. Integrated solar (BIPV) is now the standard for homeowners wanting a seamless look without the "bolted-on" panel appearance.

In-Roof (GSE)

Standard panels recessed into the roof. The most cost-effective way to get a flush, integrated finish.

£2,000 – £2,800

per kWp installed

Solar Tiles

Premium tiles (e.g. Marley SolarTile) that replace individual slates or concrete tiles for a near-invisible look.

£2,500 – £3,500

per kWp installed

Tesla Solar Roof

The ultimate luxury. Every tile on the roof is a glass shingle, providing the cleanest aesthetic possible.

£4,000 – £6,000+

per kWp installed

Storage & Exports

Tesla Powerwall 3 (13.5kWh)£7,500 – £8,500

GivEnergy All-in-One (9.5kWh)£5,800 – £6,500

Octopus Flux Export RateUp to 30p / kWh

*Battery prices are 0% VAT when installed with solar in 2026.

0% VAT

Current UK government policy zero-rates solar and battery installs until March 2027. This represents a saving of £1,400+ on a standard system.

The "Re-roof" Advantage

If you are replacing your entire roof, adding solar integrated trays is a financial "no-brainer". You save the cost of roughly 200–400 tiles (approx. £800), you use existing scaffolding (saving £1,500), and the labor is performed by the same team already on site. Total installation costs are often **30% lower** compared to a standalone retrofit.

MCS Certified

Mandatory for SEG export payments and to qualify for the 0% VAT rate.

Weight Limits

Integrated systems actually *reduce* weight on your rafters compared to heavy concrete tiles.

G99 Approval

Required for systems over 3.68kW per phase to connect legally to the UK grid.

Solar Integrated FAQ

Calculate Solar ROI

Use our 2026 calculator to see how adding solar integrated tiles or GSE panels impacts your total project cost and yearly savings.

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