My client has a 3.68kW ECCO inverter and 1 x 5.12kWh battery.

Is there a certain dataset I can view on their sunsynk.net data to show the viability of a second battery?

e.g.

Days where a second battery would have filled up

Days where a second battery would have subsidised their loads

I want to ensure it takes account of loads that are too high, such as a 10.5kW shower, not being subsidised fully by the battery.