Advisory notice
Scottish Energy Efficiency is an advisory service. All installation work is carried out by Our installation partners, who hold MCS certification, TrustMark registration, and Gas Safe registration. These accreditations belong to the installation partner, not to Scottish Energy Efficiency.
Who reviews our content
Every page on this site is reviewed by the Scottish Energy Efficiency technical team. The team combines practical renewable-energy experience with knowledge of Scottish regulations and UK building regulations. Content is written to inform, not to sell — we aim to give homeowners the facts they need to make confident decisions.
How facts are checked
Every factual claim on this site is verified against official, publicly accessible sources before publication. We cross-reference:
- VAT rates and regulatory requirements against official HMRC, Ofgem and MCS documentation.
- Product specifications against manufacturer datasheets and MCS product directory listings.
- Accreditation and registration numbers against the relevant public registers (Companies House, MCS register, TrustMark register, Gas Safe register).
How often we review
Different types of information change at different speeds. Our review cadence reflects this:
| What | Frequency |
|---|---|
| VAT rates and eligibility criteriaChecked against official HMRC and Scottish Government sources each calendar month. | Monthly |
| Product specifications and warrantiesPanel, inverter, and battery data verified against manufacturer datasheets. | Quarterly |
| Pricing and quotation dataUpdated when supplier pricing changes or new product lines are introduced. | Each quotation cycle |
| Accreditation and registration numbersMCS, TrustMark, Gas Safe, and Companies House records verified. | Quarterly |
Sources we use
We rely on the following official and independent sources. Where a claim cites a specific figure, the source is named on the page itself.
Scottish Government
Policy documents, legislation, and official announcements on energy efficiency and renewable energy.
Ofgem
Energy regulator. Source for Smart Export Guarantee rates and supplier obligations.
MCS
Microgeneration Certification Scheme. Used to verify installer accreditation and certification requirements.
Energy Saving Trust
Independent organisation providing impartial energy efficiency advice and data for the UK.
What we don’t do
Trust is built by being clear about boundaries. We commit to the following:
We never invent figures.
Every number — product specifications, pricing, regulatory details — comes from a verifiable source.
We never quote outdated information.
Key figures are checked monthly. If a scheme or rate changes between reviews, we update the page as soon as we become aware.
We never claim accreditations we don’t hold.
MCS, TrustMark, and Gas Safe accreditations belong to our installation partners. We always attribute them correctly.
How to report an error
If you spot a factual error, outdated figure, or misleading statement on any page, please let us know. We take corrections seriously and will update the content promptly.
Please include the page URL and a brief description of the issue. We aim to acknowledge all reports within two working days.
Last reviewed: 22 October 2026
Reviewed by: Scottish Energy Efficiency technical team