SiNERGY is a FP7-NMP-2013-SMALL-7 project that selects a series of relevant examples of power microgeneration and storage (thermoelectric generators, vibrational harvesters and microstructrured batteries) and pushes them further into their development and performance maturity. With that goal in mind the emphasis is put on the materials themselves and their integration route into a technology able to bring the eventual solutions closer to an exploitable phase. For this reason we consider novel silicon technology compatible materials as our starting point. The combination of those materials with device-making silicon micro and nanotechnologies is especially well positioned to make breakthrough developments in the microdomain regarding energy harvesting and storage. This approach enables (a) nanostructuring of the materials themselves, (b) dense device architectures by means of 3D high aspect ratio microstructures, which increase the resulting energy density, and (c) open the path for miniaturized complete systems through the compact assembly of the different elements involved (e.g. harvesters, batteries, power control electronics, devices to be powered) by means of hybrid or monolithic integration strategies).