Yes, with a DualSun SLL solar controller.
Here is a diagram that explains how to wire and control the booster pump:
Setting of the solar controller
To access the menu
- Press and hold down the button
- Turn the rotary actuator to the desired menus
- Enter the menus by pressing the button
Parallel relay option
- OPARR = ON
- REL = R2
- RELR = R1
- INVERS = OFF
Configuration REL relay
- Relay R2 = ONOF
Example of contactor model: Relay 230V - 2 NO contacts - 9A (AC3) contacts for inductive loads (motors, up to 1300W).