I'm making an authonomous robot (like Phoenix probe but very simple and cheap and made for Earth, no moving parts, just sensors). It controlled by Raspberry Pi and will live in forest shadowed by trees. So, I guess I can't use the solar panel in this case (or that panel will be extremely huge).
Also, I don't want that my robot sleep during charging. Ideally, if it can record data 24/7.
I need at least 10W output for RPi powering and some additional power for battery charging (for situations when generator can't produce energy).
Which types of generators are available that can produce needed power, silent and compact enough (I don't want to bring petrol generator to forest). Also, I don't want to go to forest often to replace discharged batteries.
And I don't have any rivers and don't have powerful wind here.
I want to record video and audio (when motion is detected), and ideally run OpenCV and TFLite to recognize birds and animals.
Is it possible? Can I found a way to power it for at least a week without human interaction?