What Will a 3500-Watt Generator Run? (Appliance Chart)
The list, with sourced watts
| Appliance | Running watts | Starting (surge) |
|---|---|---|
| Refrigerator/freezer (standard household) | 1,000 | 2,200 |
| Chest / deep freezer | 720 | 1,890 |
| Sump pump (1/3 HP) | 800 | 2,100 |
| Microwave oven (1000 W cook power) | 1,000 | 2,000 |
| Window AC (10,000 BTU) | 1,200 | 2,000 |
| TV, LED flat-screen | 190 | — |
| LED light (per bulb/fixture, 60W-equivalent class) | 13 | — |
| Space heater (portable electric) | 1,800 | — |
| Well pump (1/2 HP) | 1,000 | 2,100 |
| Coffee maker | 1,200 | — |
Will it run it? Item by item
| Appliance | Running W | Starting W | On a 3,500W unit? |
|---|---|---|---|
| Refrigerator/freezer (standard household) | 1,000 | 2,200 | ✅ Yes, alone |
| Chest / deep freezer | 720 | 1,890 | ✅ Yes, alone |
| Sump pump (1/3 HP) | 800 | 2,100 | ✅ Yes, alone |
| Microwave oven (1000 W cook power) | 1,000 | 2,000 | ✅ Yes, alone |
| Window AC (10,000 BTU) | 1,200 | 2,000 | ✅ Yes, alone |
| TV, LED flat-screen | 190 | — | ✅ Yes, alone |
| LED light (per bulb/fixture, 60W-equivalent class) | 13 | — | ✅ Yes, alone |
| Space heater (portable electric) | 1,800 | — | ✅ Yes, alone |
| Well pump (1/2 HP) | 1,000 | 2,100 | ✅ Yes, alone |
| Coffee maker | 1,200 | — | ✅ Yes, alone |
What it can run at the same time
Example: Refrigerator/freezer (1,000W) + Chest / deep freezer (720W) + Sump pump (800W) = 2,520W — leave room for the largest single startup surge.
3,500W-class units from our verified catalog
Spec: manufacturer
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See WEN 56380i on Amazon →Spec: manufacturer_pdf
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See Generac iQ3500 (7127/7723) on Amazon →Spec: official_press
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See Honda EU3200i on Amazon →Adjust this list in the calculator →
How many watts does a 3,500-watt generator actually deliver?
About 2,600–3,400 watts sustained. The advertised 3,500 is usually the short startup (surge) rating.
Why do starting watts matter?
Motor-driven appliances (fridges, pumps, AC compressors) briefly draw 2–4× their running watts at startup. The generator must cover running load plus the largest single surge, or the motor stalls.
Can I run more by taking turns?
Yes — one high-draw appliance at a time is the standard strategy on small units. Keep the combined running watts under the sustained budget and let one motor start at a time.
Sources
- Wattage Worksheet '3R0WATTGUIDE' (generator reference guide, Home Depot-hosted PDF) (vendor)
- A-iPower Wattage Chart (Sam's Club-hosted PDF) (vendor)
- Champion Power Equipment 'Choosing a Generator' wattage flyer (manufacturer)
- Howell-Oregon Electric Cooperative generator sizing chart (utility)
- Grounded Electric generator wattage chart (licensed electrical contractor) (vendor)
- ENERGY STAR Qualified Bulbs At A Glance (energystar.gov PDF) (gov)
Figures are conservative sizing values chosen from the range these sources report. Your appliance's nameplate is authoritative.