What Will a 7500-Watt Generator Run in a House? (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 (1/2 HP) | 1,050 | 2,200 |
| Well pump (1 HP, 240V submersible) | 2,000 | 4,000 |
| Microwave oven (1000 W cook power) | 1,000 | 2,000 |
| Window AC (10,000 BTU) | 1,200 | 2,000 |
| Furnace fan blower (1/2 HP) | 1,100 | 2,350 |
| Electric water heater (40-gal tank) | 5,500 | — |
| LED light (per bulb/fixture, 60W-equivalent class) | 13 | — |
| TV, LED flat-screen | 190 | — |
Will it run it? Item by item
| Appliance | Running W | Starting W | On a 7,500W unit? |
|---|---|---|---|
| Refrigerator/freezer (standard household) | 1,000 | 2,200 | ✅ Yes, alone |
| Chest / deep freezer | 720 | 1,890 | ✅ Yes, alone |
| Sump pump (1/2 HP) | 1,050 | 2,200 | ✅ Yes, alone |
| Well pump (1 HP, 240V submersible) | 2,000 | 4,000 | ✅ 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 |
| Furnace fan blower (1/2 HP) | 1,100 | 2,350 | ✅ Yes, alone |
| Electric water heater (40-gal tank) | 5,500 | — | ⚠️ Close — check your nameplate |
| LED light (per bulb/fixture, 60W-equivalent class) | 13 | — | ✅ Yes, alone |
| TV, LED flat-screen | 190 | — | ✅ Yes, alone |
What it can run at the same time
Example: Refrigerator/freezer (1,000W) + Chest / deep freezer (720W) + Sump pump (1,050W) = 2,770W — leave room for the largest single startup surge.
7,500W-class units from our verified catalog
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How many watts does a 7,500-watt generator actually deliver?
About 5,300–7,500 watts sustained. The advertised 7,500 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)
- Franklin Electric AIM Manual, 60 Hz Submersible Systems (Tables 3 + 29) (manufacturer)
- Erayak Power well-pump generator sizing chart (vendor)
- SizeMyGenerator well-pump starting-watts guide (figures derived from Franklin motor tables) (vendor)
- Midwest Electric Cooperative Corp. wattage page (citing U.S. DOE EERE) (utility)
- 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.