Your chosen system consists of a KODAK Solar Off-Grid Inverter King with UPS 5kW 48V inverter with 6 JA Solar 500W Mono PERC Half-Cell MBB Silver Frame modules and Kodak 3.68kWh 48V Battery Module.
This system can discharge a maximum 5250W of AC energy for powering household loads. If fully charged, the battery would sustain that rate for about 0 hours. In order to maximise the performance of the system, it is best to discharge the battery slower by avoiding high peak loads. This system would power typical household loads of 1kW for about 3.69 hours.