Insights for commercial solar finance.
Working editorial on tariffs, allowances, the macro backdrop, and the practical mechanics of structuring commercial solar projects in the UK. No vendor pieces — just working numbers and what they mean.
UK regional solar funds compared 2026 — all 30+ programmes
Comprehensive table of UK regional commercial solar funding — combined authorities, Investment Zones, devolved-nation schemes, foundation grants, innovation funding.
Battery retrofit on existing commercial solar — when it works and when it doesn't
Battery retrofit on existing commercial solar — inverter compatibility, DNO consent, project economics, and the scenarios where retrofit makes sense.
A real half-hourly data analysis: how the right size moved IRR by 4 points
A working-numbers walkthrough of half-hourly demand data analysis on a Yorkshire food production site.
NHS Trust PSDS Phase 4 application strategy — bundles that win
NHS Trust PSDS Phase 4 application strategy — bundles, multi-site portfolio bids, what scoring patterns emerge in awarded bids.
FYA deadline mechanics: year-end planning for the 31 March 2026 cliff
Practical year-end planning for capturing the 50% First Year Allowance before the 31 March 2026 deadline.
The 2026 Budget and the 50% FYA: what changed and what it means for commercial solar
The 50% FYA extension to 31 March 2026 is the most consequential single line for commercial solar economics.
Solar carport economics in 2026 — when the second-storey roof is worth it
Commercial solar carport economics in 2026. Capex premium versus rooftop, EV charging integration, scenarios where carports beat rooftop.
Solar export limits in the UK 2026 — when the DNO becomes the binding constraint
UK DNO export consents are increasingly the binding constraint on commercial solar sizing — particularly on industrial estates with limited grid headroom.
After-tax IRR modelling: what installer brochures get wrong
Installer brochures routinely quote 25-year IRRs of 25–35%. Our modelling on the same projects produces 14–20%.
Where commercial electricity tariffs are heading in 2026
Wholesale, network charging, and policy costs decomposed for 2026 commercial electricity tariffs.
AIA vs FYA detailed comparison — when each wins for commercial solar
Detailed comparison of Annual Investment Allowance vs 50% First Year Allowance for UK commercial solar with worked numbers.
Capex vs PPA: a decision tree for commercial solar in 2026
A structured decision framework for choosing between capital purchase and Power Purchase Agreement.
PSDS Phase 4: what we're seeing in the application pipeline
Working notes from the PSDS Phase 4 application window: cost-per-tonne thresholds, common scoring failures.
MEES-driven commercial solar — refurbishment windfall in 2026
How the Minimum Energy Efficiency Standards (MEES) framework drives commercial property solar deployment.
When battery storage actually changes the solar finance case
Battery economics for commercial solar in 2026: time-of-use exposure, export-limit relief, capacity market access.
The landlord-tenant solar split: structures that actually work
Three workable solutions to the landlord-tenant capex/benefit split for commercial solar.
Why half-hourly demand data changes the system size answer
Designing commercial solar by half-hourly demand profile rather than headline annual consumption.
Smart Export Guarantee tariffs Q1 2026: a cross-supplier comparison
Smart Export Guarantee tariff comparison across the major UK licensed suppliers in Q1 2026.
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