Rapid advances in battery technology, especially in cost, have made near-continuous solar power, available every hour of every day of the year, an economic and technological reality in sunny regions. Industries like data centres and factories need uninterrupted power to. . Batteries are now cheap enough to unleash solar's full potential, getting as close as 97% of the way to delivering constant electricity supply 24 hours across 365 days cost-effectively in the sunniest places. 2 How close to 24/365 solar generation is optimal? 1 kW of stable solar power across 24. . Now, the amount of electricity in terms of kWh any solar panel will produce depends on only these two factors: Solar Panel Size (Wattage). Most common solar panel sizes include 100-watt, 300-watt, and 400-watt solar panels, for example. Factors like panel efficiency, system angle, and crucially, the amount of direct sunlight available, all contribute to the final kWh count. Australian households will be able to access free electricity for three hours every day, in an effort to encourage energy use when excess solar power is being fed into the grid.