Solar panel costs in Scotland

When you are comparing solar quotes for a Scottish home, the headline price is only part of the story. Two apparently similar quotes can cover very different equipment, warranties and installation standards. This page breaks down the factors that shape the cost of a domestic solar PV system so you can read a quote with confidence.

System size (number of panels)

The biggest single driver of cost is the size of the array — how many panels you fit. A larger system generates more electricity but needs more panels, more rail and mounting, longer installation time and often a larger inverter. The right size depends on your roof area, your household electricity use and, if you are adding a battery, how much of your daytime generation you can store and use. A surveyor will look at your annual usage and roof before recommending a system size.

Panel type and efficiency

Modern monocrystalline panels are the standard choice for domestic installations, offering higher output per square metre than older panel types. Where roof space is limited, higher-efficiency panels let you fit more capacity into a smaller footprint, though the panels themselves cost more. Where roof space is ample, slightly lower-efficiency panels can deliver the same total output at a lower equipment cost.

Inverter choice

The inverter is the brain of the system. A single string inverter is the simplest and most cost-effective option for an unshaded, single-aspect roof. Micro-inverters, where each panel has its own small inverter, and power optimisers, which condition each panel individually before sending to a central inverter, cost more but perform better where there is shading or a complex roof layout with multiple aspects. Your quote should state which inverter type is included.

Battery storage

Adding a battery increases the upfront cost but lets you store surplus daytime generation for use in the evening and overnight. Battery capacity is measured in kilowatt-hours (kWh); the right size depends on how much surplus your array is likely to produce and how much you use at night. A battery can also let you charge on a cheap overnight tariff and use that stored energy during the day. See our battery storage guide for more detail.

Scaffold and roof access

Safe roof access is essential. Most domestic installations need scaffold, and the cost depends on how many elevations need it, roof height and whether there are extensions or conservatories below the work area. A straightforward two-storey semi scaffold costs less than a tall detached house needing scaffold on two sides. A quote that omters scaffold as a separate line item makes this clearer.

Roof type and condition

Slate, concrete tile and flat roofs all take different mounting systems. Concrete tiles are the most straightforward; slate requires more careful handling and a different fixing method; flat roofs use weighted mounting frames or angled brackets. If your roof covering is near the end of its life, it is worth replacing it before the panels go up — removing and refitting panels to re-roof is an avoidable cost. Your surveyor will assess the roof structure and covering.

What should be in a written quote

• Make, model and wattage of each panel, and the total system capacity in kWp.
• Inverter make and model, or the number of micro-inverters/optimisers.
• Battery make, model and usable capacity in kWh, if included.
• Mounting system and roof fixing method.
• Scaffold and access arrangements.
• Estimated installation time and date window.
• Warranties on panels, inverter, battery and workmanship.
• MCS certification and DNO notification arrangements.
• Total price, with 0% VAT applied until 31 March 2027.

0% VAT on solar and batteries

Until 31 March 2027, domestic solar panels and battery storage benefit from 0% VAT. A standalone battery added to an existing solar system also qualifies. The 0% rate is applied at the point of invoice by your installer — there is nothing separate for you to claim from HMRC.

Finance

Loans available, subject to status. If you are considering spreading the cost, ask your surveyor for details. We never quote savings figures, payback periods or invented statistics — a proper quote sets out the system specification and price, and you decide whether it suits your household.

How to get your quote

The simplest way to get a clear, written quote is to fill in the form below or on our get a quote page. We arrange a no-obligation survey through our MCS-certified partner, who inspects the roof, takes shading readings and confirms system size before issuing a written quote with a full specification. No pressure, no obligation to proceed.