These deals essentially allow you to rent or lease solar panels from a company, who will handle the full installation and all its costs themselves. What happens at the end of the agreed upon term depends on the deal made.
Some deals will see the solar panels pass into the ownership of the property owner after a period of around 10 years. This gives you at least another decade of free electricity.
Other Power Purchase Agreements might have the solar panels removed after the allotted agreement time if the deal is not extended.
For instance, in a PPA and Lease Agreement with SSE Airtricity, the solar panels will become the sole property of the business owner after a 10 year contract has expired. Others, such as UrbanVolt’s Solar as a Service contracts will see the panels removed after a 15, 20, or 25 year period if the contract is not renewed.