What Happens at the End of a Solar PPA?

Under a PPA, a funding partner pays for the solar system and you pay only for the energy it produces, at a fixed rate guaranteed to be at least 30% below the grid price. That arrangement runs for the term of the agreement, usually about 20 years. When the term ends, the system becomes your property for a nominal £1 buyout.

You do not have to raise finance or negotiate a market value at the end. The transfer for £1 is written into the agreement from the start, so the outcome is known before you sign.

Solar panels commonly carry performance warranties of 25 years or more and keep generating well beyond the PPA term, though output gently declines with age. Once you own the system, the electricity it produces no longer carries the PPA rate, so the running cost falls to maintenance and any monitoring you choose to keep.

For a business that stays in the same premises, this second phase is where the long-term value sits. You continue to displace grid electricity, but now you keep the full benefit of every unit generated. As grid prices rise, the value of that free on-site generation tends to rise with them, so the later years of a system's life can be the most rewarding.

By the time a PPA ends, some components may be near the end of their design life. Inverters, for example, often need replacing once or twice over a system's lifetime, while the panels themselves usually keep going. Budgeting for occasional part replacement keeps the system producing reliably after handover.

It is worth confirming what maintenance, warranty and monitoring arrangements continue after transfer, and keeping the commissioning and service records, so you can look after the asset once it is yours. Some businesses arrange a fresh maintenance contract at handover so responsibility for the system is clear from the day it changes hands.