Absolutely. That’s a given.
When you look at it based on current tariffs (inc low overnight tariffs) and predicted changes then it makes sense to store energy in the batteries (from solar and/or overnight cheaper rates) and use when load/prices are at a maximum.
Like everything, it’s not one size fits all but when I calculated the numbers it made long term financial sense to us to include a battery in the install with the option of additional ones later, if required.
Agreed - I have a battery to go with my PV. I fill my battery to the max at night (7.5p / kWh) and then use it during the day. If I am lucky enough to have a sunny day and charge the battery fully then I am selling back at 15p / kWh). I shall continue to do this in summer when the battery will essentially be fully charged for almost the entire time.