MEES 2030 — the deadline
MEES 2030 enforcement (EPC B for commercial lets)
Target:
The numbers that matter
Four data points landlords and occupiers should know:
This month in office solar
May 2026
MEES 2030 implementation guidance now expected Q3
DESNZ has confirmed implementation guidance for MEES 2030 tightening to EPC B for commercial lets will be published Q3 2026. Sector consultation closed end-March; final regulations expected late-2026 with enforcement from 1 April 2030. Landlords should now be planning capex programmes for the 2026-2028 window.
May 2026
Octopus Outgoing Agile tracking 11-13p/kWh average
Best-in-market SEG tariff (Octopus Outgoing Agile) is averaging 11-13p/kWh export across May 2026 — the highest sustained period since launch. Variable wholesale prices favour weekday daytime export, well-matched to office solar generation patterns.
April 2026
Salix PSDS Phase 4 application window confirmed
Salix has confirmed the Phase 4 PSDS application window will open January 2027 for projects completing FY27/28. Public-sector office buildings (NHS Trusts, local authorities, FE colleges) should be commissioning feasibility studies now to be ready for submission within window.
March 2026
UK commercial solar installed cost down 4.2% year-on-year
Across our 2025 vs 2024 installed dataset, average commercial solar PV capex fell 4.2% in real terms. Driven primarily by Tier-1 panel pricing reductions and inverter market maturation. 2026 typical: £700-£1,000/kWp on 100-500 kWp systems.
March 2026
Workplace Charging Scheme threshold confirmed at 40 sockets
OZEV has confirmed the Workplace Charging Scheme cap remains at 40 sockets per applicant business (£20,000 max at the £500/socket rate in force since 1 April 2026). Office customers with multi-site portfolios should structure applications by entity to maximise total grant pull-through.
February 2026
UK Infrastructure Bank launches commercial solar lending facility
UKIB has confirmed a dedicated commercial solar lending facility for portfolio projects above £5m. Below-market debt rates, up to 25-year terms. Office landlords with multi-building portfolios can access where individual building installs aggregate above threshold.