A Power Purchase Agreement (PPA) is a long-term contract, typically around 25 years, between a business and a renewable energy provider such as SNRG.
Under a PPA, SNRG:
In return, the business purchases the renewable electricity made available under the agreement at a simple pence-per-kilowatt-hour tariff.
This enables businesses to access onsite renewable generation without upfront capital expenditure, performance risk, or operational burden.
Between 2004 and 2024, UK non-domestic electricity prices increased by more than 500%, rising at over three times the rate of inflation.
A PPA provides:
For energy-intensive businesses, this transforms electricity from a volatile input cost into a predictable operational expense.
Manufacturing facility with 15,000m2 of roof space that consumes more than 10,000,000 kWh of electricity annually
Roof space covered
with solar PV
Estimated power of rooftop
solar system
Estimated year 1 solar
PV generation
Onsite utilisation of
solar energy
Estimated lifetime
CO2e saving
Solar system cost funded
by SNRG PPA
Average cost of grid electricity.
See page 4 for details
Est. SNRG PPA rate of solar
energy for this project
Annual indexation of SNRG
PPA rate
In this Case Study Example, the year-one savings are estimated to be £379,800.
Over a 25-year PPA term, projecting savings depends on how grid electricity prices evolve over time. As illustrated earlier, UK grid electricity prices increased by around 500% between 2004 and 2024, rising at an average of 10.3% per year — over three times faster than CPI inflation.
To provide a prudent and transparent range, the savings estimates below assume two scenarios: a low-growth case with grid prices rising at 4% per year, and a mid-growth case at 6% per year. If future grid prices track closer to the historical average of 10.3%, actual savings would be materially higher than those shown here.
Potential bill savings
range over the 25-year
PPA period:
£15.8 Million
Low case assumes grid indexation at 4% annually
£23.0 Million
Upper case assumes grid indexation at 6% annually
Unlock renewable energy without capital expenditure.
Benefit from cheaper, greener energy from day one.
Avoid the cost and resource to maintain the asset.
No need to become experts in renewable energy generation optimisation.
Optional integration with battery storage, EV charging, and smart energy management with SNRG as your energy partner helping you to navigate complex arrangements whilst you get on with running your business.
SNRG-Funded System via PPA 
Rooftop solar provides the lowest-cost renewable electricity available to industrial and manufacturing sites. By utilising existing building surfaces, rooftop systems deliver high-value generation without affecting operations or requiring additional land. SNRG manages all design, structural assessments, installation, and ongoing optimisation.
Solar carports create additional generation capacity where roof space is limited or operational areas must remain unobstructed. These structures provide renewable power while also delivering practical site benefits such as shaded parking, covered walkways, or EV charging integration.
Where land is available within the facility boundary, ground-mounted solar enables larger-scale renewable deployment. These systems deliver significant volumes of discounted power directly behind the meter, reducing grid imports and strengthening operational resilience.
Some projects benefit from strategic expansion through near-site ground-mount arrays located on adjacent or nearby land. As these developments typically require planning permission with longer lead times, they are delivered as a Phase 2 upgrade.
For sites with suitable wind resources, SNRG can incorporate small- or medium-scale wind turbines. Like near-site solar, wind installations require extended planning approvals, making them a Phase 2 technology that delivers strong long-term price stability and carbon reduction.
Battery storage enhances onsite renewable generation by maximising solar utilisation, reducing grid imports, and supporting electrification on constrained sites. Excess solar energy can be stored and discharged during peak demand periods, lowering energy costs and improving carbon performance.
Where appropriate, battery systems can also support capacity management and provide additional value through grid services, while prioritising onsite consumption and customer savings.
Inverters convert solar energy into usable power and form the central control point for each generation asset. SNRG deploys high-efficiency, utility-grade inverters with advanced monitoring and curtailment capabilities to ensure safe, optimised performance across complex industrial sites.
Our systems can include intelligent metering and controls that provide full visibility over generation, consumption, battery behaviour, and grid interaction. These systems enable:
→ Real-time optimisation
→ Export-limit compliance
→ Automated peak-shaving
→ Transparent carbon and performance reporting
Together, these technologies form a fully-coordinated energy system that delivers low-cost, low-carbon power while overcoming site constraints and unlocking long-term value for energy-intensive businesses.
SNRG is a UK-based renewable energy infrastructure company that funds and operates intelligent onsite energy systems. We believe that the future of energy demands more than just panels on a roof, which is why we have developed a world-class energy management platform that is being used on some of the UK's most complex energy projects to coordinate and automate solar, storage, EV charging and other onsite energy assets, to maximise cost and carbon savings, while overcoming grid constraints.
Backed by Centrica and Antin Infrastructure Partners, SNRG delivers the financial strength, technical expertise, and long-term operational capability required to support complex, multi-site, and high-consumption industrial customers.
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