An EZ Generator Switch can provide a controlled way to supply selected household circuits from a generator during an outage. It won’t increase the generator’s output, make an incompatible generator suitable, or automatically power every circuit in your home. Before choosing one, identify the loads you need, check the exact switch and generator ratings, and confirm that both suit your electrical system. For New Zealand homes, voltage, frequency, phase and local installation requirements deserve particular attention, especially if the switch or generator was designed for another market. A registered electrical professional can verify compatibility and install fixed wiring safely.
An EZ Generator Switch is intended to transfer selected circuits between the normal electricity supply and a generator. In a suitable, correctly installed setup, the transfer arrangement keeps the two sources from being connected to the home at the same time. That separation is essential: a generator must not send power back into the grid, where it could endanger workers or damage equipment.
The switch is only one part of the backup system. The generator supplies the electricity; the switch routes it to circuits it is designed to serve. The generator’s available output, the switch’s electrical ratings, your switchboard configuration and the wiring all have to match. A switch cannot compensate for an undersized generator or correct a mismatch in voltage, phase or connection type.
Product names alone are not enough to establish suitability. Check the exact model’s nameplate and installation instructions for its rated voltage and current, circuit arrangement, generator connection and any limitations. If those details are missing, unclear or intended for a different electrical market, ask an electrician or the manufacturer before buying or connecting it.
New Zealand homes generally use a 230V, 50Hz supply. A product made for a different country may be designed around a different voltage, frequency, phase arrangement, connector or neutral-and-earth configuration. A plug that appears to fit, or an adaptor that makes two connectors physically mate, does not prove that the equipment is electrically compatible or suitable for a fixed installation.
Ask a registered electrical professional to check the switch and generator as a complete system. The review should include:
If the product was purchased overseas, provide its model number and documentation to the electrician before installation. If the manufacturer’s instructions do not cover your supply and intended use, treat that as a reason to pause—not as a detail to solve with improvised wiring.
Start by deciding what must remain available during an outage. Common priorities include refrigeration, selected lights, internet equipment, a water or wastewater pump and medical equipment that has a suitable backup plan. Heating, cooling, cooking and hot-water systems may use substantially more power than small essential loads, and some may not be practical to run from a portable generator.
Think in terms of circuits, not just appliances. A selected circuit may serve more than one room or device, so ask an electrician to identify what is actually connected to it. A switch with several available circuit positions does not guarantee that each position can be used in your home or that the generator can run them all together.
For each priority circuit, note its normal running demand and whether it contains a motor or compressor. Refrigerators, pumps and similar equipment can draw more power when starting than while running. If several loads start at once, the generator may struggle even if their steady running demand appears manageable. Use appliance labels and manufacturer information as a starting point, then have the total checked against the generator’s continuous output and starting capability.
Pay attention to the generator’s continuous rating rather than relying on a peak or surge figure alone. Also check which outlet provides that output and whether the intended cable and switch are rated for it. The usable capacity of the complete arrangement is limited by its lowest-rated component, not by the largest number printed on one device.
Ask the electrician to check whether the chosen circuits can run together and whether you’ll need to manage loads manually. A clear plan—such as leaving nonessential equipment off while a pump starts—can be more useful than trying to back up every circuit.
The best arrangement depends on your switchboard, generator, backup priorities and whether you want manual or automatic operation. These options are not interchangeable, and a particular EZ Generator Switch model may have limitations that do not apply to every transfer switch.
| Option | How it is used | Potential advantage | What to verify |
|---|---|---|---|
| EZ Generator Switch | Transfers the circuits supported by the specific model between mains and generator supply. | May offer a straightforward way to serve selected essential circuits. | Exact model ratings, circuit compatibility, generator connection, local suitability and installation instructions. |
| Switchboard interlock | Mechanically prevents the main supply and generator supply breakers from being on together, where a compatible panel and approved arrangement allow it. | Can let a homeowner select compatible circuits at the switchboard. | Panel compatibility, correct installation, available circuit capacity and safe operating procedure. |
| Conventional manual transfer switch | Uses a dedicated switch to select between utility and generator power for specified circuits or equipment. | Provides a defined transfer point and can suit a planned list of backed-up circuits. | Number and type of supported circuits, ratings, supply configuration and installation cost. |
| Automatic transfer system | Transfers supply automatically when used with compatible standby generation and control equipment. | Can reduce the need for someone to make a manual transfer during an outage. | Compatibility, supported loads, automatic-start equipment, installation scope and whether it suits the desired backup plan. |
An EZ Generator Switch may suit a homeowner who wants a planned, manual way to power a limited set of essential circuits and whose equipment is confirmed compatible. An interlock can be a better fit where the switchboard supports that arrangement and the homeowner wants to choose among circuits. An automatic system may suit someone who needs backup without being present, but it can involve a different generator and installation setup. Ask for a comparison based on your actual switchboard and loads rather than choosing by product name alone.
Fixed wiring and generator transfer equipment need to be assessed as part of the home’s electrical installation. In New Zealand, arrange the work with an appropriately registered electrical professional, and ask what testing and documentation will be provided. A product described as “easy” or “DIY” is not a substitute for confirming that the proposed installation is suitable and compliant.
Request a written estimate that identifies the switch and related equipment, wiring or inlet work, any switchboard changes and testing. The installation cost depends on the home and the equipment; a product’s purchase price alone does not describe the full project.
Before an outage, make sure you know which circuits are backed up, how to connect the generator and what order the manufacturer specifies for starting, transferring, returning to mains and shutting down. Practise the procedure with the electrician’s guidance while conditions are calm. Labelled circuits and a short written operating checklist can prevent confusion in poor light or under pressure.
Use a generator outdoors, positioned so exhaust cannot enter the house through doors, windows, vents or other openings. Never run one indoors, in a garage or in another enclosed space, even with a door open. Follow the generator manufacturer’s instructions for placement, weather protection, refuelling and operation, and keep it away from household intake points.
Do not connect a generator by plugging its output into a wall socket. This unsafe practice can energise household wiring in an uncontrolled way and create a backfeed hazard. Use only the inlet and transfer equipment designed for the installation, and stop if a cable, connection or switch does not match the instructions.
That depends on the exact switch model, the installation and the generator, but a switch intended for selected circuits should not be treated as a whole-house solution. Even when more circuits can be connected, the generator may not have enough capacity to run them together. Ask an electrician to define the backed-up circuits and realistic operating limits.
No. The generator must match the switch and home in output rating, voltage, frequency, phase configuration and connection method. Check the generator and switch documentation together; a compatible-looking plug does not establish electrical compatibility.
Do not assume that the product name or a simple appearance makes fixed-wiring work suitable for DIY installation. Have an appropriately registered New Zealand electrical professional assess and install the transfer equipment, and follow the exact product instructions.
Possibly, but the answer depends on their running demand, starting surge and what else is operating on the backed-up circuits. Check the equipment ratings and generator capacity, and ask the electrician to confirm the combination before relying on it during an outage.
Do not assume that a single-phase generator or switch can supply circuits across all phases. The electrician needs to identify the home’s configuration and explain which circuits the proposed backup system can serve and whether a different arrangement is needed.
Choose an EZ Generator Switch only after confirming the exact model, the circuits you need and the generator’s usable capacity. For a New Zealand installation, have an electrician check supply compatibility, phase, earthing, protection and the complete connection arrangement. That assessment will show whether the switch fits your backup plan—or whether an interlock, another transfer switch or a different generator setup is more appropriate.
