Grid operator blocking times

With an interruptible heat pump tariff, the grid operator is allowed to temporarily switch off the heat pump. The system must be able to bridge these pauses.

If your heat pump runs on its own interruptible metering point, the grid operator can disconnect it from the grid at certain times. These pauses are called blocking times. This is usually controlled via a ripple control receiver in the meter cabinet.

What the regulations say

Salzburg Netz states in its technical regulations: If an interruptible tariff is used, the heat pump and auxiliary units must be suitable for daily interruptions at different times. Each grid operator determines how long and how often blocking occurs. You should therefore ask your grid operator about the specific conditions.

Why this is important for planning

• The klimaaktiv guide requires blocking times to be taken into account when sizing the heat pump, because the house has to be heated up again afterwards.
• According to the guide, blocking times can be a reason for a buffer cylinder. With underfloor heating, the screed often already acts as a buffer.

Is it worth it?

The cheaper tariff is offset by the costs for a second metering point and the restrictions. Whether this pays off for you depends on your consumption and the terms of your grid operator and electricity supplier. Find out more under Heat pump tariff and Heating costs.

All terms · Heat pump knowledge