Self-storage sites are built for solar in one obvious way: they have a lot of roof. Long, flat or gently pitched, unshaded and usually owned or leased on a long term. The less obvious question is whether the building uses enough electricity in daylight to make that roof pay. This page looks at both, honestly, so you can judge whether solar suits your facility.
Why self-storage suits solar
A typical storage facility is a collection of large, simple roofs with few vents, plant rooms or overlooking trees. That makes for straightforward layouts, efficient string design and a short installation. Many sites also sit on industrial estates or ring roads with good access, so scaffolding and lifting are rarely a problem.
Ownership matters too. Storage operators generally hold buildings for the long haul, and a solar system is a 25-year asset. If you own the freehold, the roof is yours to use. If you lease, a longer lease or landlord consent is the first thing to sort out, and we can help you frame that conversation.
What the energy profile looks like
Most of a facility’s demand is quiet but constant: LED lighting in corridors, access gates and door controls, CCTV and alarm systems, the office and reception, and often a small retail counter selling boxes and padlocks. Roller-door motors and lifts add short peaks during opening hours.
Climate-controlled and heated units are the big swing factor. Where you offer conditioned space for wine, archives, furniture or electronics, heating, cooling and dehumidification can account for a large share of the bill. That demand runs through the working day, which solar matches well, and a fully air-conditioned building can use solar output almost as it is produced.
Other loads worth counting: EV chargers for customers and staff, vans on charge, on-site van washing and any refrigeration for food or pharma storage. Each one adds demand we can design around.
An honest look at self-consumption
A basic unheated facility with lighting and security only will not use much of a very large array. That is not a reason to rule solar out, but it does shape the design. We size the system to your real half-hourly data rather than your roof area, so you are not paying for generation you cannot use.
The levers are straightforward: match array size to daytime demand, add battery storage to carry solar into the evening and overnight security load, add EV charging to soak up midday output, and consider export arrangements for any surplus. Your free bill check shows which of these makes sense before anyone talks about equipment.
Realistic savings and payback
Commercial customers who use most of what they generate typically see bill reductions in the region of 40-70%, with payback commonly in the 3-5 year range. Self-storage results sit across that spread, depending on how much of your load is conditioned space. Facilities with climate control, heavy EV use or a battery tend toward the stronger end. Sites with a low daytime load will sit lower and may suit a smaller, tightly sized system.
Because businesses can usually claim capital allowances on solar, the tax treatment can improve the numbers further. Your accountant can confirm how that applies to your structure.
Fully funded and PPA options
You do not have to put capital into the roof. Under a fully funded arrangement or a power purchase agreement (PPA), the system is paid for by a funder, and you buy the electricity it produces at an agreed rate, typically below what you pay your supplier. You get cheaper power and a hedge against rising prices without touching your reserves.
We have done exactly this for Leek Town FC: a fully funded 46.8kWp solar installation with a 69kWh battery. It is a different sector, but the model carries over to any site with a sizeable roof and a regular daytime load. You can read more on our PPA page.
Relevant experience
We have installed commercial systems across Dorset, Hampshire, Wiltshire and beyond, from small units to large industrial roofs. Our commercial case studies include Sixpenny Handley Parish Council’s pavilion, a community building with a daytime-heavy profile, and Cowdrys Bakery, where refrigeration and ovens run through the day. For a wider overview see our guide to commercial solar for UK businesses. If you run refrigerated units on site, our page on solar panels for cold storage is also relevant.
Installed by accredited, directly employed teams
DES Renewable Energy is MCS-accredited, NAPIT-registered and an RECC member, and our engineers hold City & Guilds qualifications. That matters for insurers, lenders and funders, and it means your system is designed, installed and commissioned to recognised standards. See our accreditations for details.
Start with a free business energy bill check
Send us a recent electricity bill and we will tell you, free and with no obligation, whether solar and storage makes sense for your facility, how much of your load it could cover, and whether a fully funded route is available. If it does not stack up, we will say so.
Request your free business energy bill check, email madeleine@desrenewables.com or call 01202 985 888.