EDIT: Thanks to everybody for replies and comments, which have been most useful. It seems that the hydro side of the equation would be challenging to implement, given the issues with sufficient head, protection of the generating apparatus and so on. I will look again at the possibility of solar and take it from there.
I am trying to assess the feasibility of using a micro-hydro setup to charge a car battery.
The application is that of a simple time-lapse camera that would monitor a shallow water crossing on a stream.
The problem is that there's no mains electricity anywhere nearby the water crossing where the camera would be situated so it would need a standalone power supply of some kind. The location is in dense woodland and I envisage the camera sitting there all year, so powering it with solar power under leaf cover and in this latitude (the UK) would presumably be tricky.
However, there is the stream, right there. Although small, this runs strongly and reliably all year round. I am wondering if I can hook up a 12V car battery to a small micro-hydro generator like this to trickle-charge the battery and use the battery to run the camera platform. It would probably require something like 5volt and 1.5 amps.
I know something about electronics in the abstract (I know what capacitors are, where roughly they are used, why you'd use an MLCC in preference to an Al etc). On the other hand I have no real technical knowledge, or circuit design know-how, so this would be quite a challenge and probably take me a long time. I'd be more than ready to give it a shot, provided I had some certainty that it is feasible.
Can this be done without wizard-levels of electronics ability? Any opinions or pointers welcome.