If you are a Rate M, G9 or LG customer and can exercise some load-shaving capability at Hydro‑Québec’s request, these options offer a great opportunity for you to save money on your winter electricity bill.

With the Interruptible Electricity Options, Hydro‑Québec offers you credits in exchange for curtailing your electricity consumption at its request.

These options were developed to help balance electricity supply and demand in Québec. By limiting your power consumption during the periods requested by Hydro‑Québec, you contribute to a wiser use of our collective resources. In return, Hydro‑Québec pays you the equivalent of what it spends when it buys power on open markets.

Sign-up procedure

You must submit your request to Hydro‑Québec, indicating your proposed interruptible power, before October 1.

You must commit to a base power not exceeding 80% of your average billing demand for the preceding winter period.

Conditions of application

Conditions Option I Option II
Advance notice – Weekdays 2 hours 15:00 the preceding day
Advance notice – Weekends 15:30 the preceding day N/A
Maximum number of interruptions per day 2 2
Minimum interval between 2 interruptions in the same day 4 hours 6 hours
Maximum number of interruptions per winter period 20 25
Duration of an interruption 4–5 hours 4 hours
Maximum duration of interruptions per winter period 100 hours 100 hours

Interruptions can occur:

  • Option I: at any time in the winter period;
  • Option II: between 06:00 and 10:00 or between 16:00 and 20:00 weekdays in the winter period, excluding statutory holidays.

Financial compensation

Option I

Fixed credit:

Variable credit:

  • 20.260¢ per kilowatthour of effective hourly interruptible power for each of the first 20 interruption hours;
  • 25.325¢ per kilowatthour of effective hourly interruptible power for each hour between the 21st and the 40th interruption hours inclusive; and
  • 30.390¢ per kilowatthour of effective hourly interruptible power for each of the 60 subsequent interruption hours.

Option II

Fixed credit:

Variable credit:

Examples of total credits (fixed and variable)

Interruption hours Option I
Total credit
Option II
Total credit
10 hours 152¢/kWh 112¢/kWh
20 hours  86¢/kWh  66¢/kWh
30 hours  66¢/kWh  51¢/kWh
40 hours  56¢/kWh  43¢/kWh
50 hours  51¢/kWh  39¢/kWh
60 hours  47¢/kWh  36¢/kWh
70 hours  45¢/kWh  33¢/kWh
80 hours  43¢/kWh  32¢/kWh
90 hours  42¢/kWh  31¢/kWh
100 hours  41¢/kWh  29¢/kWh

Overrun penalties

If you don’t honor the terms of your agreement, you will be subject to a penalty.

For more information

If you have any questions about these rate options, contact your commercial officer or designated agent. You can also reach our Business customer services by phone at 1 800 463‑9900 or by email at business@hydro.qc.ca.

This information has been simplified. For more details about the Interruptible Electricity Options for medium-power customers and for Rate LG customers, consult the following sections of the Electricity Rates: