These calculations show how the same electricity use produces different bills under time-of-use pricing with demand charges and Cable’s battery-backed flat rate. They support the hospitality, dental and laundromat guides. They are illustrative comparisons, not customer results, typical savings or quotes.
What stays the same in each comparison?
Each example covers 30 days. Both columns use the same kWh, timing of consumption and daily supply input. All displayed rates and totals include GST.
The assumed TOU usage prices are 48c/kWh peak, 30c/kWh shoulder and 20c/kWh off-peak. The assumed Cable price is 23c/kWh at every hour. All usage rates and the TOU offer are hypothetical. Actual Cable pricing is set for the site.
The 23c assumption is above the example’s 20c off-peak rate. Cable’s battery shifts electricity purchases towards lower-cost wholesale periods and reduces exposure to expensive periods. Battery-backed pricing does not mean matching another retailer’s off-peak tariff.
How are usage and demand calculated?
Usage cost equals kWh multiplied by dollars per kWh. For Cable, multiply total kWh by $0.23. For TOU, calculate each time band separately and add the results.
| Input | Hospitality | Dental practice | Laundromat |
|---|---|---|---|
| Peak usage | 2,400 kWh | 900 kWh | 1,200 kWh |
| Shoulder usage | 2,100 kWh | 1,500 kWh | 1,800 kWh |
| Off-peak usage | 1,500 kWh | 600 kWh | 3,000 kWh |
| Total usage | 6,000 kWh | 3,000 kWh | 6,000 kWh |
| Assumed chargeable demand | 40 kW | 20 kW | 30 kW |
| TOU usage cost | $2,082.00 | $1,002.00 | $1,716.00 |
| Cable usage cost at 23c/kWh | $1,380.00 | $690.00 | $1,380.00 |
TOU demand is assumed to cost 30c/kW/day: chargeable kW × $0.30 × 30 days. That gives $360 for hospitality, $180 for dental and $270 for the laundromat.
Cable absorbs network demand charges, so the Cable column shows $0 billed for demand. This describes Cable’s mechanism; a flat usage rate on another offer can still carry a demand charge. Actual demand tariffs can use different units, intervals, eligible hours and look-back rules.
Where does the supply charge come from?
The daily input is Ausgrid’s EA256 network access charge of 266.3967c/day including GST, effective 1 July 2026 to 30 June 2027. We assume it passes through unchanged to both example offers.
$2.663967 × 30 = $79.91901, rounded to $79.92.
This is a network input used to hold supply constant, not a universal retail supply price. Your network tariff and retail charge can differ. See Ausgrid’s network prices.
How do the totals reconcile?
| Result for 30 days | Hospitality | Dental practice | Laundromat |
|---|---|---|---|
| TOU usage + demand + supply | $2,521.92 | $1,261.92 | $2,065.92 |
| Cable usage + supply | $1,459.92 | $769.92 | $1,459.92 |
| Usage difference | $702.00 | $312.00 | $336.00 |
| Demand difference | $360.00 | $180.00 | $270.00 |
| Total difference | $1,062.00 | $492.00 | $606.00 |
These differences follow from the selected rates and usage. More off-peak use or lower demand can improve the TOU result. Do not multiply these 30-day differences by 12 to predict annual savings. Compare a full year of the site’s actual usage on current offers where available.
What is excluded?
Metering and other fees, discounts and solar credits are excluded. Gas and water are excluded, including for the laundromat. The figures compare electricity charges only.
Assess Cable’s deposit and return conditions, three-year initial term, annual CPI adjustments and other permitted rate changes separately. Include any additional site-work costs, early-exit charges and costs of leaving the existing agreement. These items can affect the overall decision even though they are outside this bill illustration.
“Backed by a battery” describes the pricing mechanism. Standard installation does not provide backup power during an outage. Site suitability and data requirements still apply; see Cable’s FAQs and service areas.
Use the example for your business
Read the hospitality comparison, dental practice comparison or laundromat comparison. Replace the illustrative inputs with the site’s meter history and the actual offer terms.
Sources checked 3 November 2026. Calculations and explanation reviewed 5 November 2026.