What is the TNB Time of Use (TOU) tariff scheme?
Time of Use (TOU) tariff scheme offers different tariff rates at different times of the day. For example, tariff rates during Off-Peak period will be lower than Peak period.
What is the TNB Enhanced Time of Use (ETOU) tariff scheme?
ETOU tariff scheme is introduced as an extension to the TOU tariff. Under this scheme, there will be three (3) time zones for Energy charge with Peak, Mid-Peak and Off-Peak rates.
On the other hand, Maximum Demand charge will have two (2) time zones with Peak and Mid-peak rates.
The scheme is also divided as follows:
Monday to Friday
Saturday, Sunday and Pubic Holidays
| Monday to Friday | 3 time zones with 3 energy rates for Energy charge: Peak, Mid-Peak and Off-Peak 2 time zones with 2 rates for Maximum Demand charge: Peak and Mid-Peak |
| Weekends and Public Holiday | 1 time zone with 1 energy rate : Off-Peak rate only Maximum Demand Charge is waived during Saturday, Sunday, and Public Holidays |
Note: ETOU will only include these fixed Public Holidays: New Year (1 January), Labour Day (1 May), Merdeka Day (31 August), Malaysia Day (16 September) & Christmas (25 December)
What are the differences between TOU and ETOU time zones?
TOU Tariff
TOU tariff has 2 time zones (Peak and Off-Peak)
TOU Time Zones are classified as follows:
ETOU Tariff
ETOU tariff scheme has 3 time zones (Peak, Mid-Peak and Off-Peak) on Monday Friday
Only 1 time zone (Off-Peak) applied on Saturday, Sunday and Public Holidays
ETOU time zones are classified as follows:
When will the ETOU tariff be offered to the customers?
The ETOU scheme will be offered as an option based on the schedule below:
| Implementation of Enhanced Time of Use (ETOU) Schedule | |
| Date | Tariff Categories |
| Starting from 1 January 2016 | Commercial customers at medium voltage (tariff C1 and C2) Industrial customers at medium and high voltages (tariff E1, E1s, E2, E2s, E3 and E3s) |
| Starting from 1 January 2017 | Industrial customers at low voltage (tariff D and Ds) |
Note: However, low voltage Industrial customers may opt for the ETOU scheme starting from1st January 2016, provided that they would upgrade to medium voltage tariff at their own cost.
Who are the customers eligible for TOU and ETOU tariff scheme?
TOU tariff scheme is offered to MV and HV customers under the following tariff category:
Commercial : Tariff C2
Industrial : Tariff E2, E2s, E3, E3s
Agriculture : Tariff H2
Mining : Tariff F2
ETOU tariff scheme will be offered as an option to LV, MV and HV customers under the following tariff category:
Commercial : Tariff C1, C2
Industrial : Tariff D, Ds, E1, E1s, E2, E2s, E3, and E3s
Why do the tariff rates vary with time periods?
Demand for electricity will be different throughout the day therefore the electricity production cost will also change with time.
For example: During Peak hours, the demand for electricity is high and therefore higher cost of generation will be incurred to generate the electricity to supply to the customers. Thus, the Peak hour rate will be higher than Mid-Peak and Off-Peak rate.
Will ETOU implementation eliminate the TOU tariff scheme?
No. The ETOU scheme is offered as an option to interested customers.
Will the TOU customers be switched to ETOU tariff scheme automatically?
No. TOU customer must apply to TNB for the ETOU tariff scheme.
What is the objective of ETOU implementation?
The objective of ETOU is to encourage Demand Side Management.
ETOU allows customers to manage their electric consumption efficiently by using less electricity during Peak hours.
What are the benefits of ETOU to the customers?
ETOU is a self-regulating tool for customers to control their electricity usage and bill.
Customers will enjoy the reduction in monthly bill by shifting their consumption to Mid-Peak and Off-Peak hours, when the rates are lower
If I choose to enrol to the ETOU scheme, can I revert to the previous tariff scheme?
Customers must be committed to stay in the ETOU scheme for a minimum of 6 months.
After 6 months, customers have the option to cancel their ETOU tariff scheme and revert to the previous tariff scheme; and all cost associated will be borne by them.
Will there be any special ETOU rates for the Special Industry Tariff (SIT) customers?
No. SIT customers will be offered the same ETOU rates offered to non-SIT customers.
Can a customer be on Special Industrial Tariff (SIT) and ETOU scheme at the same time?
No. Customer must choose either one of the applicable tariff scheme for their respective account.
Is ETOU compulsory to all customers?
No. ETOU will be offered as an option for eligible customers.
Customers must choose the appropriate tariff scheme that best suits their energy consumption.
For more information, please visit TNB website HERE or refer to Energy Commission document released on ETOU HERE.
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