The moment you decided. Your solar panels are installed on the roof and the first photons have started turning into energy.
While energy price hikes affect everyone, you enjoy a bill-free life. One-third of the system cost has already been recovered.
The system has paid for itself. Every watt you produce is now pure profit. Your savings are ready as your child starts university.
You are enjoying retirement. The world around you has changed, but the energy on your roof is still working for you.