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 Rates for Business Customers  

Rate GD

Medium-power customers

Rate GD, which applies to medium-power contracts, is an optional rate offered on backup power sold to independent producers whose main generating source is temporarily unavailable or under maintenance. The electricity purchased is used to replace the energy required for your essential loads and auxiliary services.

Rate GD does not apply if backup generators are the only equipment you use to generate electricity.

Independent producers may also be billed at the appropriate general rate, with the exception of Rate G-9.

Structure of Rate GD

Demand charge: $5.25/kW
Price of
  • period : 6.18¢/kWh
  • period : 15.30¢/kWh
Minimum monthly bill when electricity is
  • Single-phase: $12.33
  • Three-phase: $36.99

Rates in effect April 1, 2017. Under no circumstances shall this table replace the Electricity Rates.



Understanding rates

Rates have three main components that reflect the actual costs incurred by Hydro-Québec to provide electrical service.

Rate GD, like Rates M and L, has no fixed charge. However, the bill cannot be lower than the applicable minimum monthly bill.

As the amount of consumed varies, the cost of energy varies as well.

Hydro-Québec must be able to meet its customers’ maximum power demand at all times. Even if is variable and consumption is sometimes minimal, Hydro-Québec’s rates still have to cover the cost of operating and maintaining the power system. For this reason, it’s important that rates for large electricity consumers include billing for maximum power demand. This reflects the costs associated with meeting power demands of varying size and duration.

Calculating billing demand

For Rate GD, the minimum billing demand is equal to the highest demand in real power (kilowatts) during the 24 consecutive monthly periods ending with the consumption period in question.


Electricity rates also include other components

Hydro-Québec's rates assume that electricity will be supplied at low . If you have equipment to step down the voltage of the electricity delivered to you or if you use electricity at medium or high voltage, that means reduced costs for Hydro-Québec. In return, you receive a monthly credit on your demand charge. The credit is determined according to the supply voltage.

Nominal voltage between phases equal to
or greater than Monthly credit

5 kV, but under 15 kV $0.612/kW
15 kV, but under 50 kV $0.981/kW
50 kV, but under 80 kV $2.190/kW
80 kV, but under 170 kV $2.679/kW
170 kV $3.540/kW

Rates in effect April 1, 2017. Under no circumstances shall this table replace the Electricity Rates.

Hydro-Québec bills you only for the electricity you use, regardless of where it is metered in relation to the transformer substation. If metering occurs before transformation, the electricity billed will include transformation losses. So that you do not pay for losses, Hydro-Québec grants an adjustment of on the billing demand. Conversely, if metering occurs after transformation, the company will absorb the losses.


See also