With increasing digitalisation and the rapid introduction of industry 4.0 technologies, the requirements for a permanent supply of energy for self-sufficient components are becoming a fundamental demand. Due to the high number of sensors, the use of batteries with necessary battery changes is only possible with a great deal of effort, or in some cases not possible with integrated sensors. A self-sufficient, reliable energy supply on site is therefore indispensable for many applications. Also the success of e.g. Smart Watches or Smart Textiles are currently limited by the relatively short runtimes (e.g. battery life of the Apple Watch of 6-20 hours). This severely limits the mobility and comfort of the user as well as the possible applications. Currently available generators for an independent on-site energy supply do not yet represent a satisfactory solution (due to size, energy gained, reliability, price, environmental compatibility). Therefore, the aim of the project is the development of portable, self-sufficient and compact power generators based on one electromagnetic generator and one piezoelectric generator each, in order to flexibly cover a variety of potential applications. This is to ensure a self-sufficient energy supply, whereby batteries can be replaced or supplemented in such a way that the lifetimes of existing electrical systems can be increased by extending their service life by up to 10 years. Application demonstrators are planned for both generator types. For this purpose, the developments of both generator types, energy management and the construction of a radio link via a radio module for the transmission of data/signals (sensor technology) are planned. The development of the generator types includes material, individual components, production technologies and designs. The demonstrators are to be aimed at different fields of application.