At night when there is no sun, you could watch a 300W TV for about 6.5 hours before the batteries went flat (300W x 6.5 hours = 1950Whrs = 1.95 Units of electricity) or
run 40 x 5W LED globes for 10 hours (5W x 40 x10 hours = 2000Whrs = 2 Units of electricity) or
Solar panels can produce up to 1.975 kW's in full sunlight (6 x 325W = 1975W). Assuming 5 full "sun hours" in a day you would produce just less than 10 units of electricity.