For most Canadian homes, the right portable generator depends on what you want to keep running, whether the equipment has a motor that needs extra starting power, and whether you want gasoline, propane or natural-gas flexibility.
There is no single generator size that is right for every house. The best approach is to identify the appliances you expect to operate at the same time, add their running wattage, account for starting surges, and then choose a generator with enough reserve capacity.
Start with the appliances you actually need
During an outage, most homeowners do not need every appliance operating at once. They usually want a combination of heat, water, refrigeration, lighting, communications and a few essential outlets.
- Furnace blower or heating system
- Well pump or booster pump
- Sump pump
- Refrigerator and freezer
- Internet equipment, phones and computers
- Some lights and general-purpose receptacles
- Garage-door opener or selected workshop equipment
Air conditioners, electric water heaters, electric ranges, hot tubs, welders and large shop equipment can change the calculation significantly. Add those loads separately rather than assuming that a generator advertised with a large peak-watt number will run everything simultaneously.
Use the Crossfire generator wattage calculator to build an initial load list, then verify the nameplate requirements for appliances with motors. You can also compare the full Westinghouse portable generator collection.
Running watts and starting watts are both important
Running watts are the power an appliance needs after it is operating. Starting watts are the temporary surge required to start a motor or compressor. A refrigerator, furnace blower, well pump and sump pump may draw much more power for a moment when they start than they use while running.
A generator can appear large enough based on its running-watt rating but still trip its overload protection when two motors start together. For that reason, do not size a home generator using only the total of the running watts. Leave reserve capacity for starting loads and for appliances that may start unexpectedly.
Generator sizes: which range fits your home?
| Generator range | Best suited to | Crossfire models to consider |
|---|---|---|
| About 3,000-3,500 running watts | Refrigerator, freezer, lights, internet, chargers and selected small appliances. Suitable when you are managing loads carefully. | Westinghouse iGen4000DFc |
| About 3,500-4,000 running watts | A more capable essential-load setup, RV use, camping, tailgating and lighter home backup. | Westinghouse 5000DFc |
| About 5,000-6,600 running watts | Essential home backup with more room for motor loads, plus cleaner and quieter inverter power. | Westinghouse 8200TFc Tri-Fuel Inverter |
| About 7,500-9,500 running watts | Larger essential-load packages, 120/240V connections and multiple motor-driven appliances. | Westinghouse 9500TFc or 9500DFc Dual Fuel |
| About 9,500-11,600 running watts | Higher-demand home backup, larger motor loads and homes that want more operating margin. | Westinghouse WGen11500TFc |
| About 11,600-20,000 running watts | Large homes, substantial 120/240V loads and a stronger whole-home backup strategy. | WGen14500TFc or WGen20000TFc |
Best generator choices by common Canadian home situation
Small home, cottage or essential loads only
If your plan is to run a refrigerator, freezer, lights, internet equipment and chargers, the iGen4000DFc may be appropriate if you manage which loads operate together. It produces inverter power, supports gasoline or propane, and is easier to move than a large open-frame unit.
Practical backup for essential household equipment
The Westinghouse 5000DFc is a useful middle option when you want more capacity than a compact unit but do not need a large home-backup generator. It is dual fuel, inverter-based and designed for portable use.
Home backup with better capacity and three fuel options
The 8200TFc is a strong choice when you want gasoline, propane and natural gas in one machine, while still valuing inverter technology and lower total harmonic distortion. The unit is rated for 6,600 running watts on gasoline, with lower output on propane and natural gas, so size it according to the fuel you expect to use.
Larger home or several motor loads
For a home with a furnace, sump pump, well pump, refrigerator, freezer and additional household loads, start by comparing the 9500TFc and 9500DFc. The tri-fuel model gives you natural-gas flexibility; the dual-fuel model may be the better fit if you only need gasoline and propane.
Higher-demand or whole-home backup plans
The WGen11500TFc, WGen14500TFc and WGen20000TFc are intended for progressively larger loads. These are heavy equipment purchases and should be matched to the home's service, transfer equipment and intended load schedule.
Do I need a transfer switch or interlock?
If you want to power selected household circuits through the electrical panel, you need a properly installed transfer switch or interlock system. A portable generator must never be connected to a home electrical system by plugging it into a wall outlet. That can backfeed the electrical system and create a serious hazard.
Have a licensed electrician confirm the generator connection, neutral configuration, grounding, inlet, cable and panel arrangement. Product pages may identify a generator as transfer-switch-ready, but that does not mean the installation is included.
What should I do next?
- List the appliances you want to operate together.
- Record running and starting watts from each nameplate or manual.
- Use the Crossfire sizing calculator for an initial estimate.
- Choose the fuel arrangement that makes sense for your outage plan.
- Ask an electrician to confirm the transfer or interlock requirements.