You can use a spreadsheet to analyse basic data which is reported on your power bill and by your inverter. It won’t give time based usage like that recorded by a smart meter, but can provide information to make decisions.
We used a spreadsheet for many years to track export, import, PV use for each tariff (peak, off peak and shoulder where applicable).
If one isn’t exporting much power (that being the amount exported is less than battery storage capacity and subsequent import usage), batteries are less likely to have much benefit as there will be limited excess generation for the battery storage. One needs to have significant export for battery systems.
It is also worth noting that at this point in time a battery system won’t be an economic proposition. It isn’t known if and when they are likely to be. Battery systems are also not overly reliable at this stage either. Both are covered by other threads in this forum.
