Reference
Cross-cutting reference
Concepts that span multiple topics. Linked from inside each topic page where relevant. Live here so they don't get duplicated under every pillar.
Electrical supply
Single-phase vs three-phase
What it means, when it matters, how to find out which you have.
Grid
DNO notifications (G98/G99)
When notification is needed and the application process.
Tariffs
UK tariff structures
Flat, Economy 7, smart tariffs and how each interacts with solar and EVs.
Certification
MCS certification
What the scheme covers, and why it matters for grants and export.
Export
SEG (Smart Export Guarantee)
How export tariffs work and which suppliers pay the most.
Glossary
Glossary of UK terms
The acronyms a UK installer or quote will throw at you.