This Phase I report describes testing of small modules carefully designed to scavenge energy from complimentary sources within their environment, to power a wide variety of miniature wireless sensors. In this STTR, YES partnered with the Electromechanical Systems Laboratory at the University of Massachusetts at Amherst (UMASS). We examined a multi-parameter (heat, light, vibration) energy scavenging approach to cover many applications, ought to provide the best commercially-viable market solution while minimizing technical risk. We present laboratory test data for our design concept, what we call a Micro Power Plant. Thermal, light and vibration energy scavenging are explored.