Autonomous micro-hydro generators that dive into raging torrents to generate electricity, then automatically winch to safety when waters recede. Energy from the ephemeral flows you never thought you could use.
A flash flood tears through a desert arroyo—instead of fearing destruction, you watch your YoyoHydro unit automatically dive into the raging torrent. Lights on your remote cabin burst on as the generator harvests 5kW from the deadly flow. Then 4 hours later, it smoothly winches itself back up to safety as the water vanishes into the sand.