What Will a 2000-Watt Generator Run?
By the Generator Size Calculator Team · Updated · 8 min read
Quick answer: A typical 2000-watt inverter generator delivers about 1,600 running and 2,000 peak watts. That runs lights, phone and laptop chargers, a TV, a Wi-Fi router, a small sump pump and often a refrigerator if its start-up peak fits. It cannot run central AC, an electric dryer, a well pump with other loads or most power tools together.
What "2,000 watts" means on your generator
Generators list running watts (what they can supply for hours) and starting watts (a short burst for motors). Many small inverter generators are sold as "2000 watts" but deliver about 1,600 running watts, with 2,000 as the peak.
This guide assumes about 1,600 running watts and 2,000 starting watts. Check the label on yours. Anything with a motor or compressor needs extra watts for a moment to start, and lights, TVs and heating elements draw about the same all the time. See starting vs running watts.
2,000-watt generator appliance chart
Typical figures from Honda's wattage guide. The last column judges each appliance against 1,600 running watts, an 80% limit of 1,280 watts and about 2,000 starting watts. Your appliance may differ, so check its label.
| Appliance | Running watts | Starting watts | On a 2,000 W generator |
|---|---|---|---|
| Refrigerator or freezer | 700 | 2,200 | Maybe, check the peak rating |
| Sump pump, 1/3 HP | 750 | 1,500 | Yes, start it first |
| Sump pump, 1/2 HP | 1,000 | 2,100 | Maybe, check the peak rating |
| Sump pump, 1 HP | 2,300 | 4,500 | No |
| Well pump, 1/3 HP | 1,000 | 3,000 | No |
| Furnace fan, 1/3 HP | 1,000 | 1,800 | Yes, start it first |
| Microwave (625 W) | 625 | 800 | Yes, with other loads |
| Coffee maker | 1,750 | 1,750 | No |
| Toaster, 2-slice | 1,050 | 1,050 | Yes, start it first |
| Dishwasher | 1,450 | 1,800 | Maybe, on its own, near the limit |
| Washing machine | 1,150 | 2,300 | Maybe, check the peak rating |
| Clothes dryer, gas | 700 | 1,800 | Yes, start it first |
| Clothes dryer, electric | 5,750 | 1,800 | No |
| Electric range, one 8-inch element | 2,100 | 2,100 | No |
| Space heater, high | 1,500 | 1,500 | Maybe, on its own, near the limit |
| Central AC, 10,000 BTU | 1,500 | 2,200 | Maybe, check the peak rating |
| Central AC, 20,000 BTU | 2,500 | 3,300 | No |
| Central AC, 24,000 BTU | 3,800 | 4,950 | No |
| Central AC, 40,000 BTU | 6,000 | 7,800 | No |
| Air compressor, 1 HP | 1,500 | 4,500 | No |
| Welder, 100 amp | 3,600 | 3,600 | No |
| TV | 300 | 300 | Yes, with other loads |
| Computer | 150 | 150 | Yes, with other loads |
| Garage door opener, 1/3 HP | 725 | 1,400 | Yes, start it first |
LED bulbs use about 8 to 15 watts each, and chargers are tiny. For appliances not listed, use the generator wattage calculator.
Example: what a 2,000-watt generator can run at the same time
A small sump pump and a few light loads fit a 2000-watt inverter comfortably:
| Load | Running watts |
|---|---|
| Sump pump, 1/3 HP | 750 |
| Lights | 100 |
| Phone and laptop chargers | 50 |
| Modem and router | 25 |
| Running total | 925 |
The running total is 925 watts, under the 80% limit of 1,280 watts. Add the pump's extra start-up load of 750 watts. That gives a peak of about 1,675 watts, under the 2,000-watt starting capacity.
Add your own appliances and see the running and peak watts.
What a 2,000-watt generator can't run
A 2000-watt inverter is too small for central air conditioning, an electric dryer (5,750 W), an electric range element (2,100 W) with other loads, a 1 HP sump pump (4,500 starting watts), a well pump with other appliances, or a welder. A refrigerator is a close call, since its 2,200 starting watts sits right at the generator's 2,000-watt peak, so check your fridge's label and run nothing else beside it.
Can a 2,000-watt generator run a house?
No, not a whole house. A 2000-watt inverter can cover one or two essentials. For more, see what a 3500-watt generator can run and whole-house sizing.
Tips to get more out of it
- Start the biggest motor first, with nothing else running, then add smaller loads.
- Take turns with heating appliances like the coffee maker, toaster and space heaters.
- Use heavy, outdoor-rated cords. See the extension cord calculator.
- Plan the fuel. See how long a generator runs on a tank of gas.
Safety rules
Run the generator outdoors, at least 20 feet from doors, windows and vents. Never in a garage or shed, even with the door open. See how far a generator should be from your house.
- Install battery-powered carbon monoxide alarms on every level of the home.
- Never plug a generator into a wall outlet. See how to connect a generator to your house.
Frequently asked questions
Can a 2000-watt generator run a refrigerator?
Sometimes. A typical fridge needs about 700 running and 2,200 starting watts, which is right at a 2,000-watt inverter's peak. Check your fridge label, and run nothing else with it.
Can a 2000-watt generator run a window AC?
A small 5,000 to 10,000 BTU unit, often yes. See window AC generator sizes.
Can a 2000-watt generator run a TV and lights?
Yes, easily. A TV is about 300 watts and LED lights only a few watts each.
Can a 2000-watt generator run a sump pump?
A 1/3 HP pump (750 running, 1,500 starting watts), yes. A 1/2 HP pump is a tighter fit.
Is a 2000-watt generator enough for camping?
Usually, for lights, chargers, a fan and a small cooler or fridge. A 13,500 BTU RV air conditioner is too much. See can a 2000-watt generator run an RV AC.
Related calculators
Sources: Appliance and tool running and starting watts from the Honda generator wattage guide, space heater watts from Lasko, and typical generator ratings from manufacturer guides. The 80% running-load rule and the assumed starting capacity are our planning assumptions, so confirm the ratings on your own generator.