Commercial solar PPA versus ownership: what changes and what does not.
A practical comparison of capital, energy pricing, responsibility and risk for Australian commercial solar projects.
Both ownership and a Power Purchase Agreement can deliver onsite renewable electricity. The central difference is how the project is funded and how risk, maintenance and long-term value are allocated.
At-a-glance comparison
| Consideration | Customer ownership | Onsite PPA |
|---|---|---|
| Upfront capital | Usually funded by the customer or its financier. | Normally funded by the project provider. |
| Energy payment | The customer receives the generated energy after project costs. | The customer purchases generated electricity under the agreement. |
| Operations and maintenance | Customer responsibility or separately contracted. | Typically included with the provider’s obligations. |
| Performance risk | More directly retained by the owner. | Allocated through the contract and pricing structure. |
| Long-term asset value | Retained by the customer. | Depends on term, transfer and end-of-term provisions. |
| Contract flexibility | Greater asset control, subject to finance and warranties. | Governed by the agreed term, pricing and exit provisions. |
When ownership may fit
- Capital is available and the organisation values long-term asset ownership.
- The site is expected to remain in use for the project life.
- The organisation can manage or contract maintenance and performance oversight.
- Internal approval is comfortable with infrastructure investment.
When a PPA may fit
- The organisation wants onsite renewable energy without allocating upfront capital.
- Predictable contracted energy pricing is important.
- Operations and performance responsibilities should sit with a specialist provider.
- The organisation accepts a longer-term contractual commitment.
Terms that deserve careful review
- Starting tariff, escalation and indexation.
- Minimum purchase, take-or-pay or deemed-generation provisions.
- Performance guarantees and remedies.
- Maintenance access and shutdown coordination.
- Site sale, lease expiry, early termination and change-of-control provisions.
- End-of-term removal, extension or asset-transfer arrangements.
- Renewable certificate ownership and environmental claims.
Compare total outcomes, not one number
A fair comparison uses consistent energy production, degradation, tariff and operating assumptions across both structures. It should also account for capital constraints, balance-sheet preferences, risk tolerance and the value of flexibility.
This information is general and does not constitute financial, legal or tax advice. Contract terms and project suitability should be assessed for the specific organisation and site.
Compare the options for your site.
Green Grid Australia can assess customer ownership and an onsite PPA against the same load profile and operating objectives.
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