Bossrox
Solar tinkerer
I have summer & winter heaters. The summer heater in the 1st pic is on a hinge hooked to a hoist above it then to a winch for tracking the sun. It's done with pex pipe & I can easily get a tank of 150 degree water from it late spring to early fall but in the winter the suns angle is too steep to work well & that's when I kick in the 2nd heater in the other pic which is stationary. Each heater has it's own thermostat controlled pump. Each heater has dump valves on them to drain the coils if freezing is expected.