Many building owners want solar — but the roof says no. If your building has a flat roof with low load capacity, installing traditional solar PV can be a structural nightmare. Heavy ballast, complex fixings, and mounting systems that weren’t designed with your building in mind often mean solar gets ruled out entirely. PV Plus offer Lightweight Solar Solutions for Structurally Limited Roofs.
That’s where OverEasy Solar comes in. At PV Plus, we’re one of the only UK-approved installers of this ultra-lightweight, non-ballasted solution — and it’s changing what’s possible for structurally constrained roofs.
The challenge: flat roofs with weight restrictions
Whether it’s a lightweight commercial building, older stock, or something like a school or portacabin-style structure, many flat roofs just weren’t designed to take additional weight.
Typical solar systems can load 20–30kg per square metre when you factor in modules, racking, and ballast. This often exceeds structural limits — especially when snow or maintenance loadings are also considered. Upgrading the roof or adding reinforcements is costly, slow, and often unfeasible.
The solution: OverEasy Solar — just 11kg/m², no ballast, no roof fixings
OverEasy Solar’s xM-2 QUATTRO-200S units weigh just 11kg per square metre, including:
- Solar panels
- Mounting frame
- Cabling
- Integrated cable management
That’s up to 90% lighter than a conventional system. And because they require no ballast and no penetrative fixings, there’s zero need to drill into the roof or add additional structure to carry the load.
Each unit is wind-tested to EN 1991-1-4 and independently verified by the Fraunhofer Institute and IFI Aachen, so you’re not compromising on safety, either.
*In some cases, a small amount of ballast may still be required depending on factors like building height, wind exposure, and the size of the PV array — but it’s still significantly lighter than a conventional system and designed to keep structural impact to a minimum.
Who is this ideal for?
We’ve seen this solution open doors for all sorts of clients who were previously told “your roof can’t take solar”:
- Schools with modular buildings or ageing infrastructure
- Councils and public sector sites with strict budget or planning limits
- Commercial warehouses with single-skin or composite panel roofs
- Housing associations with low-load communal roofs
- New builds optimised for weight savings or green roof overlays
If your structural report says “solar not recommended” — don’t give up. OverEasy could be the answer.
Fast install. No disruption. Big impact.
Each OverEasy unit is prefabricated and plug-and-play, meaning installation is quick and low-impact. No need for scaffolding, roof reinforcements, or complex ballast calculations. Just clean, compliant solar that works with the roof you’ve already got.
And because the system uses vertical bifacial panels, you’ll benefit from a unique energy profile that captures more light during the morning and evening — helping you maximise on-site energy use and long-term savings.
PV Plus: Experts in low-impact commercial solar
At PV Plus, we’ve been delivering commercial solar since 2011 — and we specialise in solving tricky roof challenges. As one of the only approved UK suppliers and installers of OverEasy Solar, we offer full technical support, structural coordination, and hassle-free delivery for your project.
If your roof has been holding you back from going solar, this could be the breakthrough you’ve been waiting for.
Lightweight Solar Solutions for Structurally Limited Roofs
Message us or book a site assessment — and let’s unlock solar where it wasn’t possible before.
