The aim of this work is to develop an innovative TEC for avionic application with maturity level TRL5, low power consumption and high efficiency and a combination of thermoelectric materials and energy harvesting techniques. The work will be based on the experience gained in previous works of the research team, concerning marine (ECOMARINE) and avionic (RENERGISE) environments and it will investigate advanced TE materials with ZT >>1, in multistage module configurations to cope with the harsh avionic environment and novel active control schemes to achieve high COP values.