Vacuum Cleaner Wattage for Generator Sizing
About the Vacuum Cleaner
A standard upright or canister vacuum cleaner with a suction motor. Despite having a motor, the startup surge on most vacuum cleaners is minimal because the motor starts under very light load (no resistance until the suction engages). Vacuum cleaners are not typically essential during outages but may be needed for cleanup after flooding or storm damage. Shop vacuums designed for wet and dry debris draw similar or slightly higher wattage.
Generator Sizing for a Vacuum Cleaner
Running a vacuum cleaner by itself requires a generator with at least 1,375 W of capacity (2 kW), which includes a 25% safety margin. However, you rarely run a single appliance on a generator. When combined with other appliances, the vacuum cleaner contributes 1,100 W to the continuous running load.
The vacuum cleaner is a resistive load, meaning it uses a heating element or simple electronic circuit rather than a motor. Resistive loads draw the same wattage from the moment they turn on until they turn off, with no starting surge. This makes them the easiest type of appliance to run on a generator. When calculating your total generator load, the vacuum cleaner adds a flat 1,100 W to your running total with no impact on peak surge calculations. Resistive loads also produce a power factor of 1.0, meaning they use electricity very efficiently with no wasted reactive power.
To determine the total generator size you need, use our interactive calculator to combine the vacuum cleaner with your other appliances. The calculator automatically handles the starting surge calculation and applies the 25% safety margin to give you an accurate recommendation. Alternatively, browse the scenarios below to see common generator setups that include the vacuum cleaner.
Tips for Running a Vacuum Cleaner on a Generator
Running a vacuum cleaner on a generator is straightforward since it is a purely resistive load. There are no special starting procedures or surge considerations. Simply ensure your generator's continuous (rated) wattage exceeds 1,100 W plus the wattage of all other appliances running simultaneously.
Since the vacuum cleaner draws a constant 1,100 W whenever it is operating, you can accurately predict generator fuel consumption. At typical generator fuel efficiencies, running the vacuum cleaner continuously adds approximately 0.1 gallons of gasoline per hour to your fuel consumption. If the vacuum cleaner operates intermittently (like a thermostat-controlled heater), the actual fuel impact will be lower.
For sensitive electronic components within the vacuum cleaner, an inverter generator provides the cleanest power output. However, most resistive appliances work fine on conventional generators as well. If you are running the vacuum cleaner along with sensitive electronics like computers, the inverter generator protects all connected devices.
Vacuum Cleaner Wattage Compared to Similar Appliances
The following table compares the vacuum cleaner to other appliances in the other category. Understanding relative power requirements helps you make informed decisions about which appliances to prioritize on your generator and where you might find opportunities to reduce your total load.
| Appliance | Running Watts | Starting Watts |
|---|---|---|
| Vacuum Cleaner (this appliance) | 1,100 W | — |
| Phone / Tablet Charger | 25 W | — |
| Sewing Machine | 100 W | — |
| Clothes Iron | 1,200 W | — |
| Hair Dryer | 1,500 W | — |
| Electric Blanket | 200 W | — |
| Pool Pump (1 HP) | 1,500 W | 2,500 W |
Frequently Asked Questions
How many watts does a vacuum cleaner use?
A vacuum cleaner uses approximately 1100 watts of continuous (running) power during normal operation. As a resistive load with no motor, it has no starting surge above its running wattage.
What size generator do I need to run a vacuum cleaner?
To run a vacuum cleaner by itself, you need a generator rated for at least 1,375 W (2 kW), which includes a 25% safety margin above the running wattage of 1100W. However, most people run additional appliances alongside the vacuum cleaner, so your actual generator needs will be higher. Use our calculator to add your other appliances and get a comprehensive recommendation.
Can I run a vacuum cleaner on an inverter generator?
Yes, a vacuum cleaner runs perfectly well on an inverter generator. As a resistive load with no motor starting surge, it is one of the easiest appliances to power with any generator type. The clean sine wave output of an inverter generator is a bonus for any electronic components.