We work on the integration of energy harvesting devices with supercapacitors to create self charging and portable powerpacks for wearable and/or implantable devices, reaching energy autonomy in both indoor and outdoor environments. We work with third-generation photovoltaic technologies, particularly focusing on dye-sensitized solar cells (DSSCs). These offer high efficiency in diffuse and low-light conditions and offer a sustainable and straightforward fabrication process. We are also developing photovoltaic devices tailored for indoor applications, addressing the need for energy autonomy in artificial illumination conditions.