Run the essentials like more lights, television, DSTV, WIFI, laptop and a fridge. Continuous power generation during sunny hours feeding your house/office and battery. Battery can charge from the panels and grid.
 
1 × 5kw Deye Hybrid Inverter (NRS Approved)
12 × 450w solar panels
1 × 5.1 kw Lithium Battery
Installation included
COC
5 Year warranty on inverter, 10 year warranty on batteries, 25 year warranty on batteries
 
In perfect conditions, a 5kw inverter provides charging power of 4.8kw = 4800 max watts to the battery with 12 (450w) panels. In the case of  a power outage for example, if the load is drawing 1 kwh per hour, a 5kw battery will last 5 hours.