Should I install battery storage?
Battery storage is a really important part of the renewable energy solution.
If you are producing more than you use over the years, it's a very economical prospect. Power appliances at the times when the electric is high cost, and there is no sun. If your solar system is just taking care of existing power use, add more panels so that the battery is able to be charged from the sun. With a scenario where there's a heat pump involved all your energy might be going to power that, so in that case, install more panels. At this stage it's very likely you will become a "High Power Home" user and producer - see link for more details.
Our opinion is that everyone with a PV system should have storage. The more storage on the electrical network, the more stable it is going to be.