The "worth it" question is the most common at first contact. Honest answer: yes for most UK commercial property, with specific exceptions. We tell you if your site doesn't suit solar — some desk feasibilities come back negative. Below: when commercial solar is worth it, when it's borderline, and when it isn't.
When commercial solar is decisively worth it
Owner-occupier of commercial property with 7+ years of operational continuity, profitable trading, capex availability or asset finance access. Tenant on FRI lease 10+ years remaining with institutional landlord (Prologis, Tritax, GLP, Blackstone, Segro). High-self-consumption sector (cold chain, fulfilment, manufacturing, data centre). Site within Freeport zone (Felixstowe, Liverpool, Plymouth, Teesside, Solent, Thames, Humber, East Midlands). Customer mix exposed to Scope 3 mandates (Amazon, Tesco, M&S, Sainsbury's, Waitrose, JLR, Unilever).
When commercial solar is borderline (do detailed feasibility)
Short-lease tenant 3-7 years remaining: PPA structure shifts lease risk but smaller absolute economic outcome. Low-self-consumption site (cross-dock, self-storage): payback longer 6-8 years; SEG export economics matter more. Heritage building / listed status: planning consent risk and possible structural issues. Old asbestos cement roof: solar requires combined re-roof which doubles project cost (often still worth it but check business case carefully).
When commercial solar is NOT worth it
Lease ending within 3 years and no PPA structure available: insufficient time to recover investment. Building scheduled for demolition or major refurbishment within 5 years: PV asset wasted. Severe DNO capacity constraint with high reinforcement cost (£200k+) and limited project scale: economics break. Heritage Grade I listed building in conservation area with explicit refusal of PV applications: impossible to deliver. We say so plainly when these conditions apply.
Common questions about worth it analysis
How can I tell if commercial solar is worth it for my warehouse?
Three quick checks: (1) Lease term remaining + landlord cooperation. (2) Daytime electrical baseload from HH meter data — should be 70%+ of peak demand. (3) Roof condition — asbestos cement requires re-roof first. We do free desk feasibility within 7 working days.
What's the minimum lease term that makes solar worth it?
For capital purchase: 10+ years remaining. For asset finance: 7+ years. For PPA: 5+ years (rare under 5). Less than 5 years: commercial solar typically not worth it.
Is commercial solar worth it without grants?
Yes. UK commercial solar has been economically viable without grants since 2018-2019. The combination of falling capex, rising grid tariffs, and 100% AIA tax shield delivers 4-6 year payback without any grant funding.