Open your Sydney power bill this week and you will see two things working against you. Sydney Water lifted prices again on 1 July last year, and the Australian Energy Regulator's Default Market Offer for NSW rises again on 1 July 2026. For most homes in Ausgrid territory that means another 7 to 9 percent on usage rates. Hot water is the single biggest household electricity user after heating and cooling, so the tariff your tank or heat pump runs on matters more in 2026 than it ever has.
The good news is that you have more tariff choice than most homeowners realise. Controlled Load 1, Controlled Load 2, and the newer solar soak windows can each cut your hot water bill by hundreds of dollars a year, but only if the tariff matches the system. This guide walks through what each tariff actually is in 2026, which Sydney systems they suit, and how to switch before the 30 June EOFY deadline locks in the new rates.
What "Controlled Load" Actually Means in Sydney
Controlled load is a separate electricity circuit that the network operator (Ausgrid in metro Sydney, Endeavour Energy in the south-west and Illawarra) switches on and off remotely. It is wired to a dedicated meter or to a second register inside your smart meter, and it powers one nominated appliance only. In practice that appliance is almost always a hot water tank.
Because the network decides when the circuit runs, it can shift your hot water load off the daily evening peak and onto periods when wholesale electricity is cheap or solar is plentiful. In return, you pay a lower per-kilowatt-hour rate than your main household tariff. Sydney's normal residential usage rate in 2026 sits around 32 to 38 c/kWh. Controlled load rates sit well below that.
Two important points before we get into the numbers. Controlled load only works if your hot water system is hard-wired to its own circuit and can store enough hot water to ride out the off hours. A continuous flow gas unit or a small instantaneous electric unit cannot use it. And the wiring change has to be done by a Level 2 ASP, not a regular electrician.
CL1 vs CL2 in 2026: The Real Cents-Per-kWh Difference
Both tariffs are cheaper than peak, but they are not interchangeable. The table below shows current Sydney rates from the major retailers for the 2026 financial year, including network charges and GST.
| Tariff | Typical Sydney rate (2026) | Switched on (per day) | Best for |
|---|---|---|---|
| Peak / Anytime | 32 – 38 c/kWh | 24 hours | Nothing hot-water related |
| Controlled Load 1 (CL1) | 13 – 17 c/kWh | Approx. 9 hours overnight | Large electric storage (250L+) |
| Controlled Load 2 (CL2) | 18 – 22 c/kWh | Approx. 18 – 20 hours | Smaller tanks, heat pumps, families with high usage |
| Solar Soak / Sun Soaker | 6 – 10 c/kWh | Approx. 5 hours midday | Heat pumps, homes with rooftop solar |
CL1 is the cheapest pure off-peak rate, but the catch is the short window. A typical Sydney family of four uses around 200 litres of hot water per day. If you have a 315L electric storage tank, CL1 works beautifully because the tank can heat overnight and coast through the day on stored heat. Drop down to a 160L tank and the family is taking cold showers by 6pm.
CL2 fixes the run-out problem by giving the heater an afternoon top-up window. The rate is slightly higher, but the system can recover heat lost to a busy morning of showers and dishwashing. For most three-bedroom Sydney homes built since 2010, CL2 is the better default unless the tank is genuinely oversized for the family.
Heat Pumps Change the Maths Completely
Heat pump hot water systems have rewritten the tariff conversation in Sydney over the last three years. A heat pump uses electricity to move heat from outside air into the tank, so a kilowatt of input becomes 3 to 4 kilowatts of heat output. That ratio (called the coefficient of performance, or COP) depends heavily on the temperature of the air the unit is drawing from.
Here is where CL1 falls apart for heat pumps. In a Sydney winter, overnight air temperatures in suburbs like Castle Hill, Penrith and Camden routinely drop to 4 to 7 degrees. A heat pump running through that air spends 20 to 40 percent of its energy on defrost cycles and operates at a COP of 1.8 to 2.2, not the 3.5 to 4.5 quoted on the data plate. Running the same unit during the day, when air temperatures climb to 14 to 18 degrees, restores the COP and shortens the run time.
That is why every reputable Sydney heat pump installer (us included) now recommends CL2 or a solar soak tariff for heat pumps, not CL1. The slight rate premium of CL2 is more than offset by the 30 to 50 percent reduction in kilowatt-hours the unit needs to do the same heating. Our heat pump winter performance guide has the field data on this.
Solar Soak: The Tariff Reshaping Sydney Hot Water in 2026
Solar soak tariffs are the newest addition to the NSW market. They exist because Ausgrid and Endeavour now have a midday duck-curve problem: rooftop solar generation in Sydney peaks between 11am and 2pm and the grid has nowhere to put it. The networks would rather give you cheap power to use that surplus than curtail rooftop generators.
Three retailers now offer solar soak windows for hot water:
- AGL's Solar Saver, with a 10am to 3pm window at about 8 c/kWh.
- Origin's Solar Boost, 11am to 2pm at roughly 7 c/kWh.
- EnergyAustralia's Sunshine Saver, 10am to 4pm at around 9 c/kWh.
Rates and windows shift quarterly. Check the current offer for your postcode on the Energy Made Easy comparator before signing anything.
The most effective Sydney setup we install in 2026 is a heat pump on CL2 with a timer set to run only inside the solar soak window. The unit heats during cheap daytime hours, the tank holds 60 degrees through the evening, and the household pays close to nothing for hot water on sunny days. If you already have rooftop solar, pairing this with a solar PV diverter takes self-consumption even higher.
Ausgrid vs Endeavour: Sydney Suburb Differences
Not every Sydney address has the same tariff menu. The boundary between Ausgrid and Endeavour Energy runs roughly through the M7, with Ausgrid covering the CBD, eastern suburbs, North Shore, Northern Beaches and most of the Inner West, and Endeavour serving the south-west, Macarthur, Blue Mountains and Illawarra. The two networks set their own controlled load schedules and rates, and retailers can only offer what the local network supports.
Ausgrid's CL1 window runs 10pm to 7am with a brief midday refresh on most suburbs. CL2 runs 8 hours overnight plus a 10-hour daytime block. Endeavour's CL1 is slightly tighter at 11pm to 6am, and its CL2 spans 18 hours with the gap falling across the 4pm to 8pm evening peak. For a heat pump owner in Camden or Campbelltown, the Endeavour CL2 window is actually closer to ideal because the unit is forced off during the worst-COP evening hours and runs through warmer afternoons.
Confirm your network on your most recent bill (the National Meter Identifier starts with 4001 or 4002 for Ausgrid, 4204 for Endeavour) before assuming any of the rates above apply.
FAQ: Sydney Hot Water Tariffs in 2026
Do I need a smart meter to use Controlled Load 2?
In most cases yes. Older homes with a single analogue meter typically need a meter upgrade to add a second tariff register. The retailer arranges this at no cost in most Sydney metro postcodes, but the install slot can sit 4 to 8 weeks out. If you are replacing a hot water unit anyway, ask your installer to coordinate the meter swap on the same day.
Will the network really cut my hot water off during peak hours?
Yes, that is exactly how controlled load works. For a properly sized storage tank or heat pump, you will not notice the difference because the tank holds enough hot water to ride out the off period. If your household runs out of hot water on a controlled load tariff, the tank is undersized for the family, not the tariff. Our sizing guide walks through the maths.
What happens to my controlled load when the power goes out?
Controlled load circuits restart with the main supply when grid power returns. You may notice the heating cycle running at a different hour for a day or two as the network re-syncs the switching schedule. No action is needed on your side.
How to Match the Tariff to Your System
Use the matrix below as a starting point. It assumes a standard Sydney home in Ausgrid territory with a single hot water unit.
- 250L+ electric storage, no solar: CL1. Cheapest per kWh, the tank has the volume to coast through the day.
- 125L to 160L electric storage: CL2. Tank is too small for CL1's 9-hour window if the family is busy.
- Heat pump, no solar: CL2 with the unit's timer set to run 10am to 4pm. Avoid CL1 in Sydney's winter.
- Heat pump, with rooftop solar: Solar soak tariff if your retailer offers one for your postcode. CL2 with a midday timer if they don't.
- Continuous flow gas: No controlled load applies. Focus instead on a low daily supply charge and the cheapest gas tariff. Our heat pump vs gas Sydney cost guide covers the broader comparison.
- Solar PV with battery: Skip controlled load entirely. Run the hot water off the main tariff and let the battery cover the evening peak. The CL1 saving is smaller than the battery arbitrage gain.
If your home has a smart meter (most Sydney properties installed or replaced since 2017 do), the network can usually enable a second register for controlled load without a physical meter swap. If you still have an analogue spinning-disc meter, you will need a meter upgrade, which is free from most retailers but takes 4 to 8 weeks.
EOFY 2026: Why the 30 June Deadline Matters
The window between now and 30 June 2026 is unusually significant for Sydney hot water owners, and it has nothing to do with marketing. Three things converge on that date.
- Default Market Offer reset. The Australian Energy Regulator updates the maximum residential electricity price on 1 July each year. The draft determination for 2026-27 shows a 7 to 9 percent rise for Ausgrid customers and a 5 to 7 percent rise for Endeavour customers. Locking in your current retailer's 12-month plan before 1 July protects you from that rise on the controlled load rate.
- Energy Savings Scheme (ESS) rebate. The NSW Government's ESS still pays $1,000 to $2,200 off the install price of a heat pump replacement. For investors and small businesses, the deduction lands in the tax year of the install date. A 25 June install gives you the deduction this year. A 5 July install pushes it to next year.
- Small-scale Technology Certificates (STCs). Federal STC values are calculated on a deeming period that shortens by one year on 1 January each year. For installs after 1 January 2026 the STC value is already lower than 2025. The next step-down happens 1 January 2027, but the spot price of STCs tends to dip in late June as installers rush to close jobs. Booking a heat pump install in early to mid June often captures the year's best STC price.
None of this is hypothetical. The combined effect for a Sydney homeowner switching from a 20-year-old electric tank on the standard tariff to a new heat pump on CL2 plus solar soak, with the install completed before 30 June, is roughly $1,400 in rebates plus $750 to $900 a year off the electricity bill. Our 2026 NSW hot water rebates guide has the full numbers.
How to Actually Switch Your Tariff in Sydney
Three parties have to coordinate. Done in the right order, the whole change takes 2 to 3 weeks and you do not have to be home for any of it. Done in the wrong order, you can end up paying peak rates on a controlled load circuit for a month while billing systems catch up.
- Call your retailer first. Ask whether CL1, CL2 and solar soak are available at your address (this depends on the network, not the retailer). Get the new rate in writing, including the daily supply charge for the second register.
- Book a Level 2 ASP electrician. If you are moving from no controlled load to CL1 or CL2, the hot water circuit needs to be re-routed to a separate breaker and meter terminal. A Level 2 ASP is the only person legally allowed to do work between the meter and the network. Cost: typically $350 to $550 in Sydney.
- Lock in the retailer change. Once the electrician has filed the Service Order paperwork with Ausgrid or Endeavour, your retailer can flip the tariff. The first bill on the new tariff will be pro-rated.
- Verify with a meter read. Two weeks after the change, log into your retailer's app and confirm the controlled load register is recording usage at the new rate. If hot water usage is still appearing on the main meter, the wiring was not split correctly and the electrician needs to come back.
If the existing hot water unit is more than 12 years old, do the tariff change at the same time as a replacement. You will avoid paying for a Level 2 callout twice, and the new unit (especially a heat pump) is the one that actually benefits from the cheaper rate.
When the Tariff Switch Is Not Worth It
Three scenarios where staying put beats switching. We see these every week on Sydney quotes and they are worth flagging honestly.
- Continuous flow gas systems. No electric controlled load is relevant. The decision is between staying on gas, switching to a heat pump, or going hybrid. See our gas to heat pump switching guide.
- Apartments with embedded networks. If your strata building has its own embedded electricity network, you cannot choose your retailer or tariff. The building manager negotiates the rate. Push the strata committee to ask for a controlled load arrangement at the next AGM. Our apartment hot water guide covers the strata side.
- Tiny households with low usage. A single person using 60 litres of hot water a day spends maybe $180 a year heating it. Saving 40 percent of that is $72. A Level 2 electrician callout costs $400. The payback is more than 5 years, longer than most renters stay in one place.
What This Means for Your Next Bill
Hot water is one of the few household costs where you can still make a real difference between now and the end of the financial year. The tariff change is small, the install rebates are large, and the price rises locked in for 1 July make doing nothing the most expensive option on the table.
If you already have an electric storage tank and you have never checked your tariff, log into your retailer's app today and look at the rates on each register. If both registers are charging 32 c/kWh, your hot water has been on peak the whole time and a simple retailer call will fix it. If you are running a heat pump on CL1, switching to CL2 or solar soak before winter deepens will pay for itself in a single quarterly bill. And if you are weighing up a replacement before 30 June, the EOFY rebate stack genuinely is the best value Sydney has seen in five years.