my home made solar pool heater for under 100$
heats the water on an average day by around 3-4C or 6-8F
300-400 litres per hour, how much of an effect that has on your pool depends on the size of it.
solar panel 30w (from banggood) 30$
pump 15w (from banggood) 18$
black cheap water hose 100ft (30m) (home depot 15 $)
place this on the tiles next to your pool at it will work.
left over wood for crate (probably 30-40$ to make??)
styrofoam/polystyrene sheets (homedepot) 7$
2 aluminium sheets (homedepot) 22$ each
black paint matte (homedepot) 3-4$
total cost was roughly 100$ to me although I had the crate
I’d love to add some transparant sheeting on top to increase the efficiency but haven’t gotten round to it yet (and it works pretty well as is anyways)
after the video was shot, the water in the pool over the course of 2 weeks has gone fro 9c to 13c after that it seemed to stabilize, and creep up witht he weather temperature.
Its not a huge difference but it meant I could swim in the pool a couple weeks sooner and likely longer, without using actual heating.