What Is Controlled Load? Controlled Load 1 and 2 Explained for NSW Homes

What is controlled load? It is a separately metered supply in your home, usually feeding electric hot water, that the network energises during approved windows rather than around the clock. Because the network chooses when it switches on, it can schedule that energy for the cheapest, quietest times on the grid, and the rate you pay on that circuit is the lowest most NSW households can buy. If your bill shows a line called controlled load, dedicated circuit or off peak hot water, you already have one.

⚡ Quick Answers: controlled load in NSW

• What runs on controlled load? Big, patient appliances that store their output: electric storage hot water above all, plus heat pump hot water, pool equipment and some EV charging setups.
• What is the difference between controlled load 1 and 2? On Ausgrid's network, controlled load 1 guarantees at least six hours of supply in every 24, while controlled load 2 provides at least sixteen hours including daytime windows. CL2 costs a little more per unit for the longer access.
• Is it only overnight? Not any more. Since 2024 the switching increasingly happens in daylight too, soaking up cheap solar generation.
• Is controlled load the same as off peak? No. Off peak is a time band on your main tariff; controlled load is a separate circuit with its own meter register and its own lower rate. Our guide to peak and off peak times in NSW covers the other half.
• Do the details differ by network? Yes. Ausgrid and Endeavour Energy structure it differently. Check your network area in seconds with our postcode checker.

1. How controlled load actually works

A normal circuit is live whenever your home is. A controlled load circuit is different: it is wired separately at the switchboard, recorded on its own meter register, and energised on the network's schedule rather than yours. Your hot water tank does not care when it heats, only that the water is hot when you shower, so handing the timing to the network costs you nothing in comfort and wins you the cheapest rate on the bill.

The control used to be a simple timeclock or ripple signal aimed at the small hours. With smart meters it has become more flexible, which is why the windows have crept into the day.

2. Controlled load 1 vs controlled load 2

The two classes trade access for price. Controlled load 1 is the classic overnight product: at least six hours of supply in every 24 on Ausgrid's network, suited to large storage tanks that can heat once a day and coast. Controlled load 2 provides at least sixteen hours including daytime windows, suited to smaller tanks and appliances that need a top up during the day, at a slightly higher rate than CL1 though still well under general usage rates. Which class your home has, and what each costs, is on your plan fact sheet; the structure underneath comes from your distributor, which is why nearby suburbs can carry different arrangements.

3. The daytime shift: solar soak

The old logic was that the grid idles overnight, so cheap energy lived there. The new logic is that NSW now swims in rooftop solar in the middle of the day, so since 2024 networks have increasingly scheduled controlled load switching in daylight windows to soak it up. For you the effect is invisible, the tank neither knows nor cares, but it is why a modern controlled load setup pairs so naturally with the grid as it actually is now.

4. What belongs on controlled load

The ideal controlled load appliance stores its work. Electric storage hot water is the textbook case. Heat pump hot water systems can also run on it, though the tariff choice deserves thought because heat pumps sip rather than gulp, and some owners aim them at their own solar instead; our heat pump switchboard guide covers the decision. Pool pumps and pool heat pumps can suit it in some setups. Some EV charging arrangements use dedicated cheap rate circuits in the same spirit, though most EV owners land on a time of use plan instead. What does not belong: anything you need on demand, like cooking, lighting or general power.

5. When controlled load beats solar, and when it does not

If you have solar, there is a genuine fork in the road for hot water. Option one: keep the tank on controlled load and export your solar. Option two: move the tank onto a daytime timer and heat it from your own panels. The right answer depends on your controlled load rate, your feed in tariff and your tank size, and it changes as those numbers change. The arithmetic is worth doing rather than assuming; our guide to what Sydney households can move to off peak power walks through it.

6. The electrical work behind it

Adding or changing controlled load is a two part job. The tariff and metering side goes through your retailer, with the physical metering handled under our smart meter upgrade service. The circuit side happens at your switchboard: a dedicated circuit for the tank or appliance, separated from general power, with board space and protection to suit, which is our off peak hot water integration work. Older boards often need tidying or a switchboard upgrade to take the extra circuit cleanly, and where the supply or metering connection is touched it is Level 2 electrician territory.

How High Demand Electrical helps

We sort the physical half of the equation: the dedicated circuit, the board work, the metering coordination with your retailer, and the honest advice on whether controlled load, a timer aimed at your solar, or a plain time of use plan wins for your actual appliances. If you are not sure what your current setup even is, an electrical safety inspection maps the board, circuits and metering in one visit.

Controlled Load FAQs (Sydney)

How do I know if I already have controlled load?

Look at your bill for a separate usage line called controlled load, CL1, CL2, dedicated circuit or off peak hot water. If your electric hot water never seems to heat during the evening yet never runs out, you almost certainly have it.

Can my hot water run out on controlled load?

A properly sized tank heats during its windows and holds plenty for the day. If you are running out, the tank may be too small for the household, the element may be failing, or a CL1 window may no longer suit your usage, in which case CL2 or a tariff change fixes it.

Can I put my EV charger on controlled load?

Some networks and retailers offer dedicated EV arrangements in this family, but most homes get a better result from a time of use plan and a smart charging schedule. It is worth pricing both before rewiring anything.

Is controlled load worth it without electric hot water?

Usually the case for it rests on a storage appliance. If your hot water is gas and staying gas, a well used time of use plan typically serves you better than adding a controlled load circuit for its own sake.

Get the cheap circuit working for you

Ask about controlled load and metering work or call 0402 559 777. Every job starts with a site assessment so the scope and pricing are confirmed before any work begins.