Ottawa experiences an average of 4–6 significant power outages per year, with major events (ice storms, windstorms, severe thunderstorms) causing extended outages lasting 12–72+ hours. The May 2022 derecho left parts of Ottawa without power for up to 10 days.
Ottawa experiences an average of 4–6 significant power outages per year, with major events (ice storms, windstorms, severe thunderstorms) causing extended outages lasting 12–72+ hours. The May 2022 derecho left parts of Ottawa without power for up to 10 days. The January 2025 ice storm caused 3-day outages across the west end. For Ottawa homeowners, a power outage means more than inconvenience. In winter, heating systems fail within hours, allowing pipes to freeze and potentially burst — a single burst pipe causes $10,000–$50,000 in water damage. Sump pumps stop running, risking basement flooding. Food spoilage from a 3-day outage costs $300–$800. Home security systems go offline. Backup generators range from $500 portable units for basic needs to $15,000+ automatic standby systems that power your entire home seamlessly. The right choice depends on your power needs, budget, and tolerance for manual setup during an outage.
Portable generators ($500–$3,000): Gasoline or dual-fuel (gas/propane) units that you wheel out and connect manually during outages. Power output: 3,000–10,000 watts. Powers essentials (fridge, sump pump, furnace fan, lights, devices). Requires manual start, fuel storage, and extension cords or manual transfer switch. Brands: Honda, Generac, Champion. Inverter generators ($800–$4,000): Quieter, cleaner power than standard portables. Safe for sensitive electronics. Power output: 2,000–7,500 watts. Ideal for smaller Ottawa homes or as a supplement to essential circuits. Brands: Honda EU series, Yamaha, Generac iQ. Automatic standby generators ($5,000–$15,000+ installed): Permanently installed outside your home, connected to your electrical panel through an automatic transfer switch. Runs on natural gas or propane. Starts automatically within 10–30 seconds of a power outage — no manual intervention needed. Power output: 10,000–24,000+ watts. Powers most or all home circuits. Brands: Generac Guardian, Briggs & Stratton, Kohler, Cummins. Whole-home standby generators ($10,000–$25,000+ installed): Larger automatic units that power every circuit in your home including AC, electric range, electric dryer, and EV charger. Power output: 22,000–48,000 watts. For large Ottawa homes with high power demands. Installation costs for standby generators include: the generator unit, concrete pad, automatic transfer switch, gas line connection, electrical connections, and permit fees. Installation labour typically adds $3,000–$6,000 to the unit cost.
Essential circuits only (most popular): Powers furnace/heat pump fan, refrigerator, sump pump, well pump (if applicable), basic lighting, and a few outlets. Requires 7,500–12,000 watts. A Generac 10kW standby generator ($4,500–$6,000 for the unit) handles this load and is the most popular choice for Ottawa homeowners. Essential plus comfort: Adds central AC, microwave, washing machine, and more lighting circuits. Requires 14,000–20,000 watts. A 16–20kW standby generator ($5,500–$9,000 for the unit). Whole-home: Powers everything including electric range, dryer, hot tub, and EV charger. Requires 22,000–48,000 watts. A 22–26kW generator ($7,000–$15,000 for the unit). Necessary for all-electric homes without gas appliances. Key Ottawa considerations: If your home has a gas furnace, the furnace fan typically only needs 500–800 watts — meaning even a small generator keeps your heat running. Heat pumps require 3,000–6,000 watts to run. Electric baseboard heating cannot practically be powered by a generator. Natural gas vs propane: Ottawa homes on Enbridge natural gas service benefit from natural gas generators — unlimited fuel supply during outages (gas lines rarely fail). Rural Ottawa homes without gas service use propane generators with dedicated tanks (250–500 gallon). A full propane tank runs a 20kW generator for 4–7 days.
Electrical permit: Required for all generator installations in Ottawa. The Electrical Safety Authority (ESA) must inspect the installation. Your licensed electrician handles the permit application and scheduling. Gas permit: Required for natural gas generator connections. A licensed gas fitter (G2 or G1 license) must install the gas line. The Technical Standards and Safety Authority (TSSA) regulates gas work in Ontario. Placement requirements: Standby generators must be placed at least 5 feet from windows, doors, and fresh air intakes (Ontario Building Code). They must also comply with City of Ottawa noise bylaws — most modern standby generators operate at 60–70 decibels (equivalent to a normal conversation), well within residential noise limits. Transfer switch: An automatic transfer switch (ATS) is mandatory for standby generators and strongly recommended for portable generators. The ATS disconnects your home from the utility grid when the generator runs, preventing backfeed that could electrocute utility workers. Manual transfer switches ($300–$800 installed) are the budget option for portable generators. Maintenance: Standby generators require annual maintenance — oil change, filter replacement, spark plug inspection, and battery check. Most Ottawa dealers offer maintenance contracts ($200–$400/year). The generator runs a weekly self-test (typically 10 minutes) to ensure readiness.
A standby generator for essential circuits costs $8,000–$14,000 fully installed. A whole-home generator powering all circuits costs $15,000–$25,000+ installed. Portable generators cost $500–$4,000 for the unit without installation.
Most Ottawa homes need 10–16kW for essential circuits (furnace, fridge, sump pump, lights, outlets). A 22kW+ unit powers the entire home. If you have a gas furnace, a smaller generator suffices since the furnace fan only draws 500–800 watts.
Yes. An electrical permit (ESA inspection) is required for all generator installations. Natural gas connections also require a gas permit (TSSA regulated). Your installer handles both permit applications.
If your Ottawa home has Enbridge natural gas service, choose a natural gas generator — unlimited fuel supply during outages. Rural homes without gas service should use propane with a 250–500 gallon dedicated tank.