Mukesh Kumar Bansal

A method of charging an energy storage element; wherein the energy storage element comprises a plurality of energy storage units arranged for storing electrical energy; wherein the method comprises: determining a voltage of each of the plurality of energy storage units; determining a state-of-the-charge, SoC, of each of the plurality of energy storage units; determining a maximum power voltage, Vmp, of a solar power source; selecting (one or more) energy storage units of the plurality of energy… Show more

A method of charging an energy storage element; wherein the energy storage element comprises a plurality of energy storage units arranged for storing electrical energy; wherein the method comprises: determining a voltage of each of the plurality of energy storage units; determining a state-of-the-charge, SoC, of each of the plurality of energy storage units; determining a maximum power voltage, Vmp, of a solar power source; selecting (one or more) energy storage units of the plurality of energy storage units to form a charging set comprising a series and/or a parallel combination of the selected (one or more) energy storage units; wherein the selection is based on the determined maximum power voltage, Vmp, and on a first time period and a second time period associated with a first sun irradiance level and a second sun irradiance level respectively; wherein the selection is further based on a predetermined voltage and state-of-the-charge corresponding to the first and the second time period respectively; controlling one or more switches of the energy storage element to form the charging set; and providing power from the solar power source via a solar power converter to the charging set. Show less

A method of operating a luminaire, the luminaire comprising or being coupled to a battery, the battery being coupled via a grid charging unit to a mains grid, and the luminaire comprising or being coupled to a solar unit; the method comprising: detecting whether or not a condition indicating lighting conditions in an environment of the luminaire is below a predetermined threshold; determining whether or not the battery is being charged; if the condition indicating lighting conditions being… Show more

A method of operating a luminaire, the luminaire comprising or being coupled to a battery, the battery being coupled via a grid charging unit to a mains grid, and the luminaire comprising or being coupled to a solar unit; the method comprising: detecting whether or not a condition indicating lighting conditions in an environment of the luminaire is below a predetermined threshold; determining whether or not the battery is being charged; if the condition indicating lighting conditions being below the predetermined threshold is detected and if it is determined that the battery is being charged, detecting load flickering of the luminaire, wherein the load flickering is attributable to a load ripple through the battery, wherein the load ripple is due to the coupling of the battery with the grid charging unit; and if load flickering of the luminaire is detected, correcting the load flickering of the luminaire. Show less