Drafting and development of photovoltaic systems; technological consulting services in the field of alternative energy generation; reconstruction of database systems for others; scientific research conducted using databases; monitoring of battery charging status; research and development relating of renewable energy production; research and development of power converters/inverter/charger for used in renewable energy systems; research in the field of energy; technical diagnostic testing services relating to energy management; advisory services relating to energy efficiency; research and development of power storage system; management power storage apparatus; maintenance of computer software used for operating filling apparatus and machines; design of apparatus and machines for filling purposes; developing of integrated energy concepts