Government & regulators
GOV.UK and Ofgem are preferred for current policy, tax, scheme and regulatory information within their remit.
Home›Sources & references
SOURCE HIERARCHYSources & references
Where HEY Solar looks first when facts need checking.
OUR STANDARD
Clear about what we know, where changing facts come from, what an online estimate cannot prove, and HEY Solar's role in the enquiry journey.
Industry & consumer guidance
MCS and Energy Saving Trust are useful authoritative references for installation standards, certification context and consumer-facing energy guidance.
Network, supplier & manufacturer information
Distribution network operators, energy suppliers and manufacturers can be appropriate sources for network processes, current tariff terms and equipment-specific specifications. Those facts are attributed to the relevant organisation rather than generalised.
Links and review dates
Important changing claims may include a direct source link and a review date. A link is evidence for the particular claim it supports, not an endorsement of every statement on the external website.