Abstract: A hybrid electrical power supply control system for providing electrical energy to at least one load. The load may alternate between a first low energy consuming operational modus and a second high energy consuming operational modus. The control system may include a first power source comprising at least one battery unit and a second power source comprising at least one energy harvesting unit and arranged to harvest and convert energy into Direct Current, DC, energy, and wherein the converted DC energy is stored in a charge collecting unit. The control system further includes an operational modus detecting unit and a power source switching unit, connected to the operational modus detecting unit and arranged to alternately connect the first power source and the second power source to the load.

Abstract: The invention relates to an electrical power energy converter unit for converting Direct Current to Direct Current, DC-DC, with maximum power point tracking that measures converted power at the output and controller module.

Abstract: A hybrid electrical power supply control system for providing electrical energy to at least one load, said load alternating between a first low energy consuming operational modus and second high energy consuming operational modus, and wherein said control system comprises: a first power source comprising at least one battery unit and arranged to be switched to said load for supplying electrical energy; a second power source comprising at least one energy harvesting unit and arranged to harvest and convert energy into Direct Current, DC, energy, and wherein said converted DC energy is stored in a charge collecting unit, and wherein said second power source is further arranged to be switched to said load for supplying electrical energy; an operational modus detecting unit, arranged for detecting whether said load being in said first or in said second operational modus; a power source switching unit, connected to said operational modus detecting unit for receiving said detected first or second operational modus

Abstract: An energy harvester (RF) to convert incident radio frequency, RF, energy associated with an RF signal to direct current energy comprises a rectifier (5) comprising a pre-storage capacitor (4), wherein said rectifier is arranged to rectify said incoming RF energy (3), storing the RF energy into the pre-storage capacitor (4), followed by an energy transfer unit (6) comprising a storage output capacitor (8), the value of the storage output capacitor (8) is higher than the value of the pre-storage capacitor (4), the energy transfer unit is arranged to transfer said energy from the pre-storage capacitor into the storage output capacitor including a control unit (2).