Ballasted Systems
A non-penetrative mounting solution ideal for flat commercial roofs. Weighted ballast holds the array in place without piercing the membrane, protecting waterproof integrity and simplifying installation.
No-penetration, flat roofsCommercial solar roofing systems
Solar PV engineered into the roof, combining energy generation with waterproofing performance.
Commercial rooftop solarBenefits
Future-proof your energy strategy. Turn your roof into a working asset.
Energy volatility is now a persistent risk for UK firms, with electricity costs, carbon reporting and EPC standards central to business stability. A commercial roof is an asset that can generate energy, support compliance and improve resilience when integrated correctly.
Cut your electricity bills
Generate power on-site and reduce reliance on fluctuating grid prices. Solar helps stabilise long-term operating costs and shields against future tariff hikes.
Improve your energy rating
On-site renewable generation can enhance your building's EPC performance and overall energy profile, positioning your property favourably in a tightening regulatory environment.
Reduce your carbon footprint
Solar directly reduces scope 2 emissions by decreasing grid electricity use, offering measurable environmental benefits that strengthen ESG reporting and sustainability goals.
Increase property value
Energy-efficient, self-generating buildings appeal to investors and tenants. Solar can boost asset desirability, support rental positioning and enhance long-term capital value.
Stay ahead of the regulations
Energy standards and EPC requirements keep evolving. Installing solar now helps shield your building from future compliance pressures and lowers the risk of costly reactive upgrades.
Make your roof work harder
From solar to bio-solar build-ups, your roof can deliver energy efficiency, biodiversity benefits and long-term asset resilience without sacrificing waterproof integrity.
Systems
Solar systems built around your roof. Four approaches, matched to your building.
Every roof is different. Our sRoof systems span ballasted, lightweight, facade and glazed solutions, so generation can be specified to suit structural capacity, building type and project goals without compromising the waterproof layer.
Lightweight Integrated
Engineered for roofs with limited load capacity, this system integrates lightweight PV directly into the roof build-up, balancing generation with structural constraints on industrial and retrofit projects.
Low load, retrofit-readySolar Facade
Vertical PV integrated into the building envelope, turning facades into generating surfaces. Suited to buildings where roof area is limited or architectural impact matters.
Vertical, building-integratedSolar Glazing
Semi-transparent photovoltaic glazing that generates energy while admitting daylight. Ideal for atriums, canopies and glazed roofs where aesthetics and performance both count.
Transparent, daylight + power
Funding
Funding that fits your strategy. Match the model to your building and capital.
Access to funding can strengthen the economic case for commercial rooftop solar. From capital purchase to staged finance and fully funded Power Purchase Agreements, solar investment can be aligned with your organisation's financial strategy as well as its energy goals.
Pay upfront
CAPEX purchase
Your organisation funds the system upfront and keeps full ownership of the asset. All electricity savings stay within the business, usually offering the strongest long-term financial return. Best suited to organisations with available capital and long-term control of the building.
Leasing options
Pay as you save
The system is financed through staged payments over a set period. Energy savings from on-site generation help offset those repayments, reducing the need for significant upfront capital and safeguarding cash flow while the installation stays fully integrated with your building.
Power purchase agreement
Fully funded PPA
A third party funds and owns the installation. Your organisation buys the electricity generated at a pre-agreed rate, usually below grid prices. This removes capital expenditure, though the long-term return is lower than an ownership model.
Select a funding option
You own the system. Highest long-term return profile.
Example building type Small unit
For illustration only. Use the calculator for an exact projection based on your roof.
Upfront costIllustrative
£40k
Direct ownership with the strongest long-term return profile.
Estimated annual benefit
£12k
Illustrative savings based on standard assumptions.
Payback
4.0 yrs
Indicative payback varies by tariff, usage profile and system design.
25-year net value
£240k
Indicative cumulative value over 25 years based on standard assumptions.
What the value profile typically looks like
Small unit · CAPEXYear 1£24kEarly savings begin once the system is live.
Year 5£84kStrong momentum as savings accumulate.
Year 25£240kHighest long-term value profile (illustrative).
Figures shown are illustrative examples only. Actual outcomes depend on roof size, orientation, shading, structural constraints, export arrangements, tariff, funding terms and final system design.
Installation and maintenance
From survey to commissioning. One team, the whole way.
Every commercial solar project begins with the roof. Allbase oversees the entire process, from initial survey to commissioning and beyond, so solar integration supports long-term roof performance as well as energy output.
Survey and suitability checksWe confirm what's viable on site before any design decisions are locked in.
What happens
- Roof condition, access and shading checked
- Inverter location and cable routes reviewed
- Orientation and pitch confirmed for accurate modelling
What you get
- Suitability outcome and practical next steps
- Constraints flagged early to avoid surprises
- Inputs gathered for a realistic estimate
System design and yield estimateSurvey inputs become a clean layout, sensible sizing, and transparent assumptions.
What happens
- Panel layout based on usable area and setbacks
- Inverter selection and optional battery sizing
- Yield estimate produced from site inputs
What you get
- Outline design summary and system specification
- Yield explained in plain language
- Options only where they add real value
Quotation and savings modelClear scope, lead times, and a savings estimate tied to your electricity-rate assumptions.
What happens
- Scope and inclusions defined clearly
- Programme and lead times confirmed
- Savings model built from design assumptions
What you get
- A transparent quote with deliverables
- Indicative payback and annual saving estimate
- Simple route to approve and schedule
Installation and on-site worksPlanned installation with staged checks, designed to keep disruption low.
What happens
- Mounting, panels and electrical connections installed
- Inverter and battery fitted where specified
- Integrity and isolation checks completed
Accredited by
MCSNICEICRECC
Commissioning, monitoring and handoverTesting, monitoring setup, and a walkthrough so you can see performance from day one.
What happens
- Commissioning and functional testing
- Monitoring and app setup with walkthrough
- Final checks and sign-off documents
What you get
- Monitoring ready immediately
- Handover pack and guidance notes
- Support route if anything looks off
Aftercare, monitoring checks and maintenanceOngoing support plus planned maintenance options to protect performance over time.
What happens
- Support interpreting monitoring and performance
- Guidance on usage patterns and battery settings
- Maintenance visits available for inspections and checks
What you get
- A clear support route and response expectations
- Optional maintenance plan to keep systems running well
- Advice on add-ons and future upgrades
FAQs
Solar questions, answered. What businesses ask before they start.
Common questions about suitability, disruption, timescales and funding for commercial rooftop solar.
Is my roof suitable for commercial solar?
Most commercial roofs are suitable, but it depends on structural capacity, roof condition, orientation and shading. We confirm viability with an on-site survey before any design work, so you have a clear answer early.
Do I need to replace the roof before installing solar?
Not always. If the waterproofing is nearing the end of its life or structural upgrades are needed, those should be addressed before or alongside installation. We assess roof condition as part of the survey and advise honestly.
How disruptive is installation?
We plan works to keep disruption low, with staged checks and clear scheduling. Most commercial installations continue with normal building operations around them.
How long does a commercial solar project take?
Timescales vary with system size and roof complexity. The survey, design and quote stages move quickly; installation itself is typically a matter of days to weeks once scheduled.
What funding options are available?
Capital purchase, lease or pay-as-you-save finance, and fully funded Power Purchase Agreements. Each suits a different balance of upfront cost, ownership and long-term return; the comparison tool above gives an illustrative sense of each.
What affects savings the most?
Roof size and orientation, shading, your electricity tariff and how much generation you use on site. Export arrangements and system design also play a part. The calculator models these for your specific roof.
Can solar be combined with green roofs?
Yes. Bio-solar build-ups pair solar generation with a vegetated roof, and the cooler roof surface can improve panel efficiency while delivering biodiversity and drainage benefits.
Do you cover the whole UK?
Yes, we deliver commercial solar projects across the UK, backed by 30+ years of roofing and materials experience.
