A Power Purchase Agreement, commonly called a PPA, is a contractual arrangement for the purchase and sale of electricity over an agreed period. PPAs can form part of a business's wider energy procurement and renewable-energy strategy.
What is a PPA?
A PPA defines commercial terms for electricity supplied from a generation project. The exact structure can vary substantially depending on the project, buyer, generator, contract period and pricing mechanism.
What is a solar PPA?
A solar PPA can be associated with electricity generated by a solar project. For businesses, PPAs can provide a route to procuring renewable electricity without necessarily owning the generating asset directly.
What should businesses examine?
- Contract length
- Pricing structure
- Volume arrangements
- Generation assumptions
- Indexation
- Balancing arrangements
- Termination provisions
- Credit requirements
- Renewable certificates and reporting
| Question | Why it matters |
|---|---|
| How long is the contract? | Determines the long-term commitment |
| How is electricity priced? | Affects financial exposure |
| Who takes generation risk? | Important where renewable output varies |
| What happens if requirements change? | Relevant to business growth and relocation |
A PPA is a commercial contract, not simply a solar quote
Businesses should understand the contractual, financial and energy-market implications before signing a long-term PPA.
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Explore Commercial SolarFrequently asked questions
What is a Power Purchase Agreement?
A PPA is a contractual arrangement defining the purchase and sale of electricity over an agreed period.
What is a solar PPA?
A solar PPA is an electricity purchase agreement associated with power generated by a solar project.
Are PPAs good for businesses?
They can provide long-term renewable electricity procurement, but the contract terms and financial exposure need to be assessed carefully.
How long do PPAs last?
Contract periods vary depending on the project and commercial structure.
Sarah Kimani
Systems Designer at BrightGrid Energy

