Yes, you can turn off a heat pump at night if this aligns with your heating needs and comfort preferences. Modern heat pumps are generally able to quickly reach the desired temperature when turned on, so turning them off during periods of reduced heat demand can save energy.

Here are some considerations:

1. Programmable Thermostat:

   • If your heat pump is connected to a programmable thermostat, you can set the heating to lower temperatures or turn off the heat pump entirely during the night period when you require less heating.

2. Night Prevention:

   • Some heat pumps have a night prevention mode that allows them to operate at a lower speed during the night to maintain temperature without excessive energy use.

3. Comfort Considerations:

   • Turning off the heat pump at night may result in a drop in indoor temperature. It's important to consider your comfort level and personal preferences.

4. Efficiency Considerations:

   • Turning off the heat pump when not needed contributes to more efficient energy use. Modern heat pumps are designed to start up quickly, so turning them off during inactive periods can have a positive effect on total energy consumption.

5. Frost Protection:

   • Keep in mind that some heat pumps have a frost protection feature. This ensures that the system does not freeze in extremely low temperatures.