Use of System Charge

The Use-of-System charges, which is payable to SP Group, is to recover the cost of transporting electricity through the national power grid. Note that the charges differ according to the voltage at which a consumer receives the electricity supply.

Effective 1 April 18

Contracted Capacity Charge ($/kW/month) Peak Period Charge (¢/kWh) Off-Peak Period Charge (¢/kWh) Reactive Power Charge (¢/kVArh) Uncontracted Capacity Charge 7 ($/kW/month) Uncontracted Capacity Charge 7 ($/kW/month)
CCS8 ECCS9
Tier 1 Tier 2
Ultra High Tension 1 6.840.060.020.4410.2634.2034.2082.08
Extra High Tension 2 7.680.080.030.4811.5238.4038.4092.16
High Tension - Large 3 8.580.740.080.5912.8742.9042.90102.96
High Tension - Small 4 8.580.940.090.5912.8742.9042.90102.96
Low Tension - Large 5 -5.313.99-----
Low Tension - Small 6 -5.31-----
Ultra High Tension 1
Contracted Capacity Charge ($/kW/month)6.84
Peak Period Charge (¢/kWh)0.06
Off-Peak Period Charge (¢/kWh)0.02
Reactive Power Charge (¢/kVArh)0.44
Uncontracted Capacity Charge 7 ($/kW/month) 10.26
CCS834.20
ECCS9
Tier 134.20
Tier 282.08
Extra High Tension 2
Contracted Capacity Charge ($/kW/month)7.68
Peak Period Charge (¢/kWh)0.08
Off-Peak Period Charge (¢/kWh)0.03
Reactive Power Charge (¢/kVArh)0.48
Uncontracted Capacity Charge 7 ($/kW/month) 11.52
CCS838.40
ECCS9
Tier 138.40
Tier 292.16
High Tension - Large 3
Contracted Capacity Charge ($/kW/month)8.58
Peak Period Charge (¢/kWh)0.74
Off-Peak Period Charge (¢/kWh)0.08
Reactive Power Charge (¢/kVArh)0.59
Uncontracted Capacity Charge 7 ($/kW/month) 12.87
CCS842.90
ECCS9
Tier 142.90
Tier 2102.96
High Tension - Small 4
Contracted Capacity Charge ($/kW/month)8.58
Peak Period Charge (¢/kWh)0.94
Off-Peak Period Charge (¢/kWh)0.09
Reactive Power Charge (¢/kVArh)0.59
Uncontracted Capacity Charge 7 ($/kW/month) 12.87
CCS842.90
ECCS9
Tier 142.90
Tier 2102.96
Low Tension - Large 5
Contracted Capacity Charge ($/kW/month)-
Peak Period Charge (¢/kWh)5.31
Off-Peak Period Charge (¢/kWh)3.99
Reactive Power Charge (¢/kVArh)-
Uncontracted Capacity Charge 7 ($/kW/month) -
CCS8-
ECCS9
Tier 1-
Tier 2-
Low Tension - Small 6
Contracted Capacity Charge ($/kW/month)-
Peak Period Charge (¢/kWh)5.31
Off-Peak Period Charge (¢/kWh)5.31
Reactive Power Charge (¢/kVArh)-
Uncontracted Capacity Charge 7 ($/kW/month) -
CCS8-
ECCS9
Tier 1-
Tier 2-
  1. Ultra High Tension - for consumers taking supplies at 230kV and above.
  2. Extra High Tension - for consumers taking supplies at 66kV.
  3. High Tension - Large - for consumers taking supplies at 22kV or 6.6kV and with a Contracted Capacity of at least 1,700kW.
  4. High Tension - Small - for consumers taking supplies at 22kV or 6.6kV and with a Contracted Capacity of less than 1,700kW.
  5. Low Tension - Large - for large industrial and commercial consumers taking supplies at 400V/230V. These are contestable consumers with time-of-day metering.
  6. Low Tension - Small - for all non-contestable consumers taking supplies at 400V/230V.
  7. The Uncontracted Capacity Charge (UCC) applies in the event that the maximum demand in kW (measured by the half-hour integration meter) exceeds the Contracted Capacity. UCC applies to:
    1. Normal customers without embedded generation;
    2. Customers with embedded generation who require top-up supplies and opt to summate their kW output from embedded generation and kW demand from the network (i.e Summation Scheme) for determining maximum demand; and
    3. Customers with embedded generation who require top-up supplies and opt to cap their power demand in kW drawn from the network (i.e Capped Capacity Scheme or Extended Capped Capacity Scheme). The UCC applies in the event that the maximum demand in kW (measured by the half-hour integration meter) exceeds the contracted capacity and shall be limited to 20% of the Contracted Capacity.
  8. For Capped Capacity Scheme (CCS), the Uncontracted Standby Capacity Charge (USCC), at 5 times of Contracted Capacity Charge, applies in the event that the demand in kW (measured by the power meter) drawn from the network exceeds 120% of the contracted capacity for a duration of more than 10 seconds continuously.
  9. For Extended Capped Capacity Scheme (ECCS), the 2-tier Uncontracted Standby Capacity Charge (USCC) applies as follows:
    1. Tier 1: 5 times of Contracted Capacity Charge is applicable if the demand in kW drawn from the network exceeds 120% and up to 200% of the contracted capacity for a duration of more than 100 seconds continuously.
    2. Tier 2: 12 times of Contracted Capacity Charge is applicable if the demand in kW drawn from the network exceeds 200% of the contracted capacity for a duration of more than 10 seconds continuously.
  10. For both CCS and ECCS, the consumer shall at its own expense, install and maintain Load Limiting Device, in accordance with requirements that the Transmission Licensee may stipulate from time to time.

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