N91 — General Supply Seasonal Time of Use

Endeavour Energy · Default · Low voltage · 2026–27

Western Sydney, the Blue Mountains, Southern Highlands and the Illawarra.

N91 General Supply Seasonal Time of Use tariff guide

Who it’s for

Businesses connected at low voltage, generally below 160 MWh a year.

What you pay

You pay different energy rates at different times. Check the current time periods and seasonal rules.

If you get solar

Solar reduces grid use while it is generating. Its value depends on the energy rate at that time.

If you get a battery

A battery can move energy to a more expensive period. Use actual retailer prices and allow for battery losses.

Check before you decide

  • Confirm this code on a current retailer bill.
  • Use the retailer prices, not only the network price list.
  • Measure the energy that can move between time periods.
2026–27 network prices

What it costs, and when

These are the network’s charges only. Your retailer adds its own prices on top.

N91 in one day

Solar soak runs every day. Peak is business days only.

What the network charges

Daily
108.77031 c/day
High-season peak
27.67072 c/kWh
Low-season peak
18.60353 c/kWh
Solar soak
5.68656 c/kWh
Off-peak
14.78631 c/kWh

When the rates apply

Solar soak is 10am–2pm every day. Peak is 4pm–8pm on business days.

Illustrative example

Move N91 energy out of a summer peak

  • Move 1,000 kWh from high-season peak to solar-soak time.
  • Ignore battery losses and degradation.
  • Use GST-inclusive network rates.
1,000 kWh × (27.67072 − 5.68656) c/kWh ÷ 100$219.84 difference in the network energy component.

The customer may not receive this spread. Use the retail contract for an investment model.

Would a battery help?

A guide, not a quote

Conditional fit

Time-of-use load shifting

The tariff provides a time-window signal rather than a demand target. Battery value depends on a repeatable price spread, sufficient cycling volume and a control system that preserves energy for the expensive window.

A battery can reduce these

  • Peak-period grid imports shifted into a cheaper network or retailer window.
  • Solar generation carried into later business load.
  • Retailer energy exposure where its time periods align with battery dispatch.

A battery can’t change these

  • Daily access, metering and other fixed charges.
  • A network demand charge where none is included in this tariff.
  • Energy already consumed directly from solar without incurring battery losses.

You’d need to check

  1. At least 12 months of interval usage and export data grouped by tariff window.
  2. Both retailer and network time periods and rates.
  3. Solar production, operating hours and seasonal load changes.
  4. Round-trip efficiency, usable capacity, cycling and degradation assumptions.