PV produces power (electricity). Heliac produces heat. The best commercially available PV panels have a conversion efficiencies below 20%. Heliac’s panels convert 60% of the incoming sunlight to heat. In 2018, PV globally produced 640 TWh of electricity. In comparison, global annual demand for heat below 400°C is 30,000 TWh. Storing energy as electricity in Li-Ion batteries costs >€300 per kWh capacity. In comparison, depending on temperature level and number of charging cycles, storing energy as heat costs €1-25 per kWh capacity.