The main difference between an active and passive solar water heater is the way in which they circulate the water. An active solar water heater uses a pump or other mechanical device to circulate the water through the system, while a passive solar water heater relies on natural convection to move the water. This means that an active system requires external power to function, whereas a passive system operates without any mechanical components.
An active solar water heater uses a pump or other mechanical device to circulate water or heat transfer fluid through the system, while a passive solar water heater relies on natural convection or gravity to move water through the system.
An active solar water heater utilizes pumps or fans to circulate the water or heat transfer fluid, while a passive solar water heater relies on natural convection or thermosiphon to circulate the water.
