A Power Purchase Agreement (PPA) needs to be signed. This is a long-term electricity contract (15-25 years), which allows Otter to fund the solar panels.
A price for the electricity is calculated that is less than the grid electricity supply price, and is linked to general inflation, not energy inflation, so savings increase over time.
We operate and maintain the system over the period, gifting it to the site at the end of the term with years of useful life left (or we can remove it).
Where applicable we can install batteries, EV charging and upgrade the electricity infrastructure, possibly through private networks, to overcome site constraints.