How do I set it to run with solar?

How do I set it to run with solar?

If you have solar panels, your hot water heat pump’s running costs will be even lower:
Time your heat pump to power up after the sun starts shining on the PV panels.
Your heat pump will store free solar energy in the form of hot water.
Then your family can use hot solar-powered water any time they want, even when the sun isn’t shining. 
This combination time-shift + self-consumed energy will cut your electricity bills even more than just a solar system, or just a heat pump, would on its own.