NOVELTY - Energy harvesting system, comprises cultivation areas (1) for producing renewable biomass, at least one biogas system (3) for producing biogas, at least one combined heat and power (CHP) plant (4) for generating heat and electric power, at least one drying system (7) for drying sludge and/or fermentation residue of the biogas system and/or biomass into mixed briquettes, and at least one syngas system for producing syngas. The biomass from the cultivation areas is used in the biogas system to generate biogas, and/or in the drying system to produce mixed briquettes.    USE - The energy harvesting system is useful for obtaining renewable energy (claimed).    ADVANTAGE - The energy harvesting system: is energy efficient and cost efficient; and allows safe storage of renewable energy.    DETAILED DESCRIPTION - Energy harvesting system, comprises cultivation areas (1) for producing renewable biomass, at least one biogas system (3) for producing biogas, at least one combined heat and power (CHP) plant (4) for generating heat and electric power, at least one drying system (7) for drying sludge and/or fermentation residue of the biogas system and/or biomass into mixed briquettes, and at least one syngas system for producing syngas. The biomass from the cultivation areas is used in the biogas system to generate biogas, in the drying system to produce the mixed briquettes, and/or in the syngas system to produce syngas. The heat generated by the at least one CHP plant is used for the drying system. The biogas of the biogas system and/or the syngas of the syngas system is used to operate the CHP plant, and the mixed briquettes of the drying system are used in the syngas system to produce syngas. INDEPENDENT CLAIMS are also included for:    (1) harvesting renewable energy comprising using the energy harvesting system;    (2) a biomass collection system for the energy harvesting system, comprising many silo containers (2), each of which is constructed such that it has at least one opening through which biomass is discharged and which is air-tightly lockable;    (3) a heat accumulator, comprising three-shell casing comprising an inner container, an outer container and an insulating layer arranged between inner and outer container, where storage blocks, and water are present in the interior space; and    (4) storing and/or using excess energy, where driving at least one compressor with the generated energy, generating the compressed air, where the compressed air is bottled in mobile bottles, which are mobile and interchangeable.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the energy harvesting system.    Cultivation areas (1)    Silo containers (2)    Biogas system (3)    Combined heat and power plant (4)    Drying system (7)