Look at possibilities to reduce your load with a view to excluding such devices from use under load shedding conditions. e.g. stoves and geysers.
Consider replacing electric stoves with gas and geysers with solar geysers or heat pumps. This will both reduce the size and therefore the cost of the required systems and reduce your overall electricity bill.
These two items are usually excluded from being connected to the solar PV systems as their load places high demand for both inverter size and battery capacity.
It is far less expensive to conserve than to produce electricity.
Water heating
The best way to deal with this is to convert to Solar Water heating, a Gas geyser or heat Pump. For reasons of efficiency and cost effectiveness, I favour Solar Water heating. A correctly sized system will supply all your hot water at a fraction of the cost of heating it electrically.
Cooking
Where possible it is best to convert to a gas hob and oven. This also reduces you monthly electricity bill.
Lighting
External lighting is another area of potentially high electricity demand as external lights are often on all night.
All lighting should be converted to LED’s Even the old fashioned internal down lighters are a high consumer of electricity and best replaced with LED versions. The old halogen lamps use up to 50W of power as opposed to 5W or less in the case of LED bulbs. Big rooms and patios may have large numbers of these lights.
Electric heaters
Electric space heaters are also very high demand devices and should be changed out to gas heating of wood burning fires where possible. One should not expect to use Electric space heaters from a solar PV system.
Underfloor heating
Electric underfloor heating is not viable to run under inverter essential loads and should be operated only as a non-essential load when the grid is available if at all.