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Commercial solar
Commercial Solar Assessment
Before we propose a system, we need to understand your building and how your business uses electricity. This page explains what we ask for, what we check on site, and what you get back.
What we need from you
- The site address and who owns the roof: you, a landlord, or shared.
- Half hourly consumption data for the last 12 months if you have it. Your supplier or meter operator can provide this. If you do not have it, recent bills are enough to start.
- Your supply type, if you know it: single or three phase, and the size of the supply.
- Anything planned, such as a roof replacement, an extension, new machinery or EV charging, because these change the design.
What we look at
The roof
Area, orientation, pitch, shading, condition and remaining life. If the roof needs work soon, it is better to do it before solar goes on.
The structure
Whether the roof can carry the extra load. On some buildings this needs a structural engineer’s report, which we arrange.
The electrics
Your intake, distribution boards and where the inverter, isolators and any battery can go safely.
The grid
How much the local network can take. Larger systems need a G99 application, and the network operator can set an export limit or require works. We tell you early if this is likely to affect the design or timing. More in our guide to commercial solar and G99.
Planning
Permitted development limits, conservation areas and listed building status.
Mounting rails going down on a flat roof in NW10, before the panels are fitted.
What you get back
- A system design with the panel layout, and inverter and battery options.
- Expected annual generation, and how much of it your site is likely to use, based on your own consumption pattern.
- Purchase and PPA (no upfront cost) options set out side by side.
- The grid connection route and a realistic timetable.
- Anything that needs resolving first, such as roof repairs or a structural check.
We do not put savings figures in front of you until they are based on your own data. For larger systems, the G99 application is usually the longest step, and the network operator sets that timetable.
Request a commercial solar assessment
Tell us about the site and we’ll come back to you within one working day.
Common questions
Do you work outside London?
Yes. We cover London and roughly 50 miles around it.
We don’t have half hourly data. Can we still start?
Yes. Recent electricity bills are enough for a first look. Half hourly data makes the design and the generation figures more accurate, so we will ask for it before the final proposal.
Can you look at a system that is already installed?
Yes, including systems we did not install. See commercial solar maintenance.
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