Your Direct To Triad Charges

1.0 What are TRIAD charges?

TRIAD charges solely apply to electricity consumers alongside half-hourly meters.

The Transmission Network Use of System (TNUoS) accuse is levied past times National Grid inwards company to hold too prepare the national electricity system. The TNUoS accuse inwards your furnish contract tin endure fixed or exceed through.  If y'all convey a exceed through contract the TNUoS accuse is based on your unloose energy consumption during the TRIAD Periods.

A TRIAD menstruum is ane of 3 one-half hourly periods of maximum need that plough over betwixt Nov too Feb each year. Each TRIAD menstruum must endure separated past times at to the lowest degree 10 days.

2.0 Why are TNUoS charges based on the TRIAD periods?

Basing the TNUoS charges on the periods of peak need encourages commercial too industrial users to minimise their need on the arrangement during these times.

3.0 How are TRIAD charges shown on my electricity invoice?

For xi months of the twelvemonth your electricity supplier volition account y'all for an estimated TNUoS accuse each month. This volition appear inwards the Fixed Cost department of your invoice. Suppliers job unlike methods to calculate this figure.

For example, touchstone TRIAD charging method: a variable monthly fee based on 85% of your monthly maximum need at each site or Customer forecast TRIAD charging method: a fixed monthly fee based on a twelfth of your forecasted TRIAD need for each site.

In March each twelvemonth the National Grid lay out details of the times too Maximum Demands relating to the 3 TRIAD periods too your supplier volition account y'all for the reconciled TNUoS accuse instead of the estimate.

4.0 How are TRIAD charges calculated too reconciled?

4.1 Calculate the Maximum Demand for the TRIAD Periods

                                                   Example: 61 + 58 +49 = 168

4.2 Multiply Average Maximum Demand past times the Loss Adjustment Factor for each period

For xi months of the twelvemonth your electricity supplier volition account y'all for an estimated TNUoS accuse each month. This volition appear inwards the Fixed Cost department of your invoice. Suppliers job unlike methods to calculate this figure.

For example, touchstone TRIAD charging method: a variable monthly fee based on 85% of your monthly maximum need at each site or Customer forecast TRIAD charging method: a fixed monthly fee based on a twelfth of your forecasted TRIAD need for each site. 

In March each twelvemonth the National Grid lay out details of the times too Maximum Demands relating to the 3 TRIAD periods too your supplier volition account y'all for the reconciled TNUoS accuse instead of the estimate.

                                            Example: 61 + 58 +49 = 168

The calculated maximum need inwards the previous department is thus multiplied past times the Loss Adjustment Factor/Line Loss Factor.

Below is a demonstration of the minute stair (figures for illustrative purposes solely too assumes LAF is the same for each period)

                                        Example:168 x 1.085 = 182.28

4.3 Multiply past times HH Zonal Tariff

Multiply the consequence from the previous stair past times the zonal tariff accuse (see fig 1).

Example:

For this demonstration nosotros are using the Eastern zonal tariff of £29.89.

182.28 x £29.89 = £5,448.35

The full TRIAD accuse is £5,448.35

Zone Name (HH)	2013/14 Tariff (£/kW)
1 Northern Scotland	11.05
2 Southern Scotland	16.79
3 Northern	22.35
4 North West	25.18
5 Yorkshire	25.49
6 due north Wales & Mersey	25.63
7 East Midlands	28.21
8 Midlands	29.20
9 Eastern	29.89
10 South Wales	27.54
11 South East	32.83
12 London	34.08
13 Southern	33.75
14 South Western	33.55

Figure 1. Zonal Tariff Charges (Source: National Grid, PDF Page 18)

4.4 Divide past times the issue of Maximum Demand Periods

You volition involve to carve upwards the full TRIAD accuse past times the issue of maximum need peaks at that topographic point were (this volition ever endure three). This volition give y'all your annual TRIAD figure.

Example:

£5,448.35 / 3 = £1,816.12

4.5 Deduct TNUoS from TRIAD Charge

From the full TRIAD accuse inwards the previous step, y'all volition involve to subtract the TRIAD charges already invoiced to obtain your reconciled figure.

Example:TNUoS Charge Deduction from Total TRIAD charge

£1,818.12 - £768.72 = £1,047.28

You would encounter a balancing TRIAD accuse of £1,047.28 on your invoice. If the figure is a minus, this would betoken that y'all are inwards credit.

5.0 How tin I produce goodness from TRIAD periods?

If y'all tin minimise your electricity usage through the TRIAD menstruum it volition lower your electricity costs.

TRIADS are really difficult to predict too a warning arrangement tin endure a vital way to assistance y'all deal your usage. H5N1 warning arrangement volition position probably peak periods too post y'all an alert. This volition endure determined past times demand, previous sense too conditions forecasts.

6.0 How tin I predict when the TRIAD periods volition be?
Historically peak need usually coincides alongside lighting-up time, betwixt Mon too Th (normally betwixt 16:30 too 18:00) but occasionally at that topographic point are exceptions.TRIAD peaks tin endure straight linked alongside conditions too if it is an extremely mutual frigidity wintertime this agency that peaks could endure higher too autumn subsequently inwards the day.

7.0 What tin I produce to bring down my consumption during potential TRIAD periods?

1)      Think virtually what equipment y'all tin plough off.

2)      Delay recharging equipment for job the adjacent day. Ideally produce this after midnight.

3)      Switch off air conditioning, job choice heating or cooling methods.

4)      Use an choice ability beginning such equally a standby ability generator.

8.0 How tin assistance me?

Your Account Manager volition hash out which type of contract that is best for you.  Do y'all desire to create your TNUoS charges for budgetary certainty or produce y'all desire to potentially lower your costs past times opting for a exceed through contract too managing your electricity usage during potential TRIAD periods? We volition provide y'all alongside all the facts too figures to assistance y'all brand the correct decision.

If y'all create upwards one's heed on a exceed through contract volition lay inwards house a TRIAD warning arrangement to warning y'all when the peak periods are probably to occur. This volition give y'all the fourth dimension to prepare your concern to bring down your usage.  tin recommend Energy Efficiency measures to assistance y'all bring down your usage.