Power Purchase Agreement
Solar PPA: cheaper power, zero capital
A solar Power Purchase Agreement (PPA) is the closest thing to free solar panels that actually exists. We fund, install, own and maintain the system on your building; you simply buy the electricity it produces at a discounted rate that is locked in for the contract, shielding you from market spikes without spending a penny of capital.
- 1
We build it, free
GTP designs, installs and owns the system on your roof.
- 2
You buy the power, cheaper
A rate below your grid tariff, locked for the term.
- 3
We maintain everything
Monitoring, servicing and performance are our problem.
- 4
You choose the ending
Extend, buy the system outright, or have it removed.
For commercial sites
- £0 capital, nothing on the balance sheet
- Discounted power at a locked rate
- Maintenance included for the whole term
Who it suits
Is a PPA right for your site?
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You want zero upfront cost and zero debt
Nothing on the balance sheet, no capital tied up, no borrowing capacity used.
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Your site uses power in the daytime
Warehouses, factories, cold storage, offices: the more daytime load, the better the saving.
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You plan to stay put
PPAs run long-term. Commercial and industrial sites with secure tenure benefit most.
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You want maintenance to be our problem
Performance risk sits with us. If the system underperforms, that hurts our returns, not yours.
PPA FAQs
What is the fine print on a solar PPA?
How long does a solar PPA contract last?
Terms are agreed per project and run long-term, with the length set against system size and the rate. Longer terms generally mean cheaper power. Every agreement we offer includes clear end-of-term options: extend, buy the system outright, or have it removed.
What does a PPA cost the customer upfront?
Nothing. Design, installation, equipment, grid application and ongoing maintenance are all funded by us as the system owner. Your only cost is the discounted rate you pay for the electricity generated.
What if the panels generate more than we use?
Surplus power is exported and the agreement sets out how that value is treated. Systems are sized to your consumption profile first, because self-use at a discounted rate is where your saving comes from.
What are typical power purchase agreement rates in the UK?
Solar PPA rates are set per project, but the defining feature is that the rate sits below your current grid tariff and is locked for the term, typically with agreed indexation. The bigger your daytime consumption, the sharper the rate, because more of the generation is sold rather than exported. We quote your actual rate after modelling a year of consumption data.
Who insures and maintains the system?
We do, as the owner. Monitoring, servicing, repairs and performance are our responsibility for the whole term, which is why a PPA is the lowest-risk route into solar.
PPAs fund commercial solar installations with no upfront capital. Compare with asset finance on our funding hub.
Pay less for power. Pay nothing upfront.
If your roof qualifies, a PPA can be generating within months. Free feasibility check on any commercial building.