Sector Insights
May 15, 2026
UK manufacturers are some of the strongest candidates for rooftop solar, and some of the most resistant. The three objections we hear most often, and why they don't usually hold up.
UK manufacturers are some of the strongest candidates for rooftop solar. Heavy daytime electricity use that matches generation. Large flat or pitched roof areas sitting unused. Energy bills that have become the second or third largest line on the operational P&L. By the engineering, it's an obvious fit.
By the conversation, it's usually a fight. Manufacturers have been pitched by solar installers since at least 2010 and they've heard every angle. The objections come up in roughly the same order on every call. Three of them dominate, and three of them mostly don't hold up.
This was true a decade ago. Rooftop solar at scale was a six-figure capex commitment for a mid-market manufacturer, and finance directors were right to be cautious about competing with production equipment and operational priorities for capital.
The PPA model removed that constraint. Installer partners fund the entire system, the manufacturer commits no capital, and pays a fixed kWh rate for the electricity generated for 15-20 years. The capital question disappears. The conversation shifts from "can we afford this?" to "is the kWh rate good enough?"
The honest answer is usually yes. Typical PPA rates sit 30-50% below current grid prices, locked for the contract term, with no exposure to grid price volatility for two decades. Manufacturers asking about the capital cost are usually asking the wrong question. The right question is what the cost per unit of electricity will be over the asset's life, and how that compares to the alternative of buying grid power at whatever 2030 prices look like.
Sometimes true. Often not. The roof concerns usually fall into three categories:
Structural condition. Older roofs may need a structural assessment before any installation. That assessment is part of the survey process, costs nothing to the customer if conducted by the installer partner as part of the project scope, and frequently comes back fine. Where it doesn't, the installer can usually specify panel layouts that don't load the weakest sections.
Roof material. Profiled metal roofs, standing seam, single-ply membrane, concrete — all common on UK industrial buildings and all installable. Asbestos is the genuinely difficult one and would usually require roof replacement before solar, which kills the economics. Outside asbestos, most roof types are workable.
Roof age. A 20-year-old roof with five years of life left isn't a good candidate. A roof with 15-20 years of life left to match the PPA contract is. The survey assesses both.
The blanket "our roof won't take it" assumption is usually based on no actual structural data. The way to find out is to send the bills and book the survey, not to rule it out from the kitchen.
This is the most common objection and the most expensive one. The thinking goes: we'll review everything when our current supply contract ends. We'll look at solar at the same time. One conversation, less hassle.
The problem is that solar generation displaces grid consumption. If your solar comes online and starts producing 30% of your daytime demand, you're buying 30% less grid electricity. That changes your contract economics. The best time to install solar is well before the supply contract renews, so the supply contract reflects post-solar consumption rather than pre-solar consumption.
The other problem is that solar installation takes 8-16 weeks from first conversation to a generating system. If you wait until your contract is six months out, you're already late. The lead time means solar conversations should happen 12-18 months before the next supply renewal, not 3 months before.
If you're a UK manufacturer reading the objections above and recognising the language, send us your bills. Not as a sales pitch — as a way to find out whether the objections are actually true for your specific site, or whether they're inherited assumptions that haven't been tested. Our broker and installer partners will come back within five working days with a real comparison and a real fit assessment. If your site genuinely doesn't suit solar, we'll tell you that, and you can stop having the same conversation with every installer who calls.
