Heat pump relay kit to suit Balboa controllers. This relay kit connects a pool/spa heat pump to your existing Balboa controller, giving you energy efficient heating.

This relay kit allows you to either use the controllers heater element and a heat pump, or just the heat pump instead of original heater element.

This is compatible with all BP, GL and GS series(excluding the GS100) controllers.

Most heat pumps will have a flow switch interrupt circuit, or can be wired into the flow switch circuit manually.