Be even less dependent on an external energy supply by retrofitting battery storage
We purchased our system 9 years ago without storage. We've now had a battery storage unit retrofitted and are delighted with how much more efficiently we can use the system.
Sooner or later, almost every PV operator will consider retrofitting their system with a PV unit. Using more solar power yourself means higher returns because, by avoiding using an external energy supply, you save more than you would usually get when feeding into the grid.