If the battery is 7.2kWh in size, how many appliances can I run off it at the same time?
When looking at batteries there are two factors to consider; power (measured in kw) and energy (measured in kWh). Power governs how many appliances you can run simultaneously and energy governs how long you can run for. The more power you draw the less runtime your have. The AGL battery has a 3kW output which should be more than enough to power lighting, a refrigerator and a number of outlets for several hours.