What size generator for a 1500 sq ft home?

Check, uncheck or adjust the typical device list below — watts, startup surge and battery size update instantly. Numbers come from U.S. DOE, ENERGY STAR and manufacturer spec sheets, not marketing copy.

1. Check what you need to power

Refrigeration & Freezers

  • 1

Kitchen

  • 1

Heating, Cooling & Fans

Water & Pumps

Laundry & Cleaning

Electronics & Office

  • 1
  • 1
  • 2

Medical Devices

Power Tools & Outdoor

Lighting

  • 4

2. Your sizing

Running load1,259 Wtypical certified-model range 1,248–1,268 W; we size with a conservative value
Startup peak2,334 Wdriven by 1× Refrigerator (top-freezer, ~16 cu ft)
Daily energy2,225 Wh
Recommended capacity2,790 WhBasis: 1 day of typical usage, incl. 25% margin for inverter loss & battery depth of discharge
Backup duration:

Assumptions: daily hours per device follow DOE / ENERGY STAR duty cycles; capacity adds a 25% margin. Check your appliance nameplates — actual draw varies by model.

3. Best matches from our 6-brand database

  1. Anker SOLIX F3800~$2,199
    • rated 6,000W covers your 1,390W continuous load
    • surge 9,000W covers your 2,334W start peak
    • 1.7 days of your typical daily use (3,840Wh / 2,225Wh)
    • 120/240V split-phase output
    Check price →
  2. EcoFlow DELTA Pro 3~$2,799
    • rated 4,000W covers your 1,390W continuous load
    • surge 8,000W covers your 2,334W start peak
    • 1.8 days of your typical daily use (4,096Wh / 2,225Wh)
    • 120/240V split-phase output
    Check price →
  3. Generac GB2000partial coverage ~75% of target~$1,869
    • rated 1,600W covers your 1,390W continuous load
    • surge 3,200W covers your 2,334W start peak
    • covers about 75% of the target capacity for your selected duration (2,106Wh vs 2,790Wh recommended)
    Check price →

Static answer (crawlable summary)

Typical device list: Refrigerator (top-freezer, ~16 cu ft)×1, Router + Modem×1, LED Bulb (60W equivalent)×4, Microwave Oven×1, Phone / Smartphone Charger×2, TV (43-inch LED)×1.

Estimated from: Energy Star Certified Products · Mfr spec class: Netgear KB + measured (ARRIS SB8200) · Energy Star Certified Products (bulbs) · VT Extension table (DOE-derived) · Unbound Solar Power Table (secondary) — some household values are cross-checked class estimates (not single-model nameplates); check your own appliance nameplate before buying.

Continuous load1,259 W
Startup peak2,334 W (driven by 1× Refrigerator (top-freezer, ~16 cu ft))
Daily energy use2,225 Wh
Recommended capacity2,790 Wh (25% margin included)
Minimum inverter1,390 W continuous

Frequently asked questions

What size generator for a 1500 sq ft home?

For a typical setup (Refrigerator (top-freezer, ~16 cu ft), Router + Modem, LED Bulb (60W equivalent), Microwave Oven and Phone / Smartphone Charger, plus 1 more device), you need at least 1,259W of continuous power. The single biggest moment is startup: when 1× refrigerator (top-freezer, ~16 cu ft) kicks on, the momentary draw peaks at 2,334W. For a full day of runtime we recommend at least 2,790Wh of battery capacity (your devices use about 2,225Wh per day, plus a 25% margin for a full day of use).

Which power stations can handle this?

Based on published specs, Anker SOLIX F3800, EcoFlow DELTA Pro 3, Generac GB2000 cover the 2,334W startup peak and deliver 1.7 days / 1.8 days / about 75% of a full day of typical daily use. Check the comparison cards above for the full numbers.

Why is the startup surge higher than the running watts?

Motor-driven devices (fridge compressors, well pumps, air conditioners) draw 2-5× their running power for a split second at startup — measured as locked-rotor amps (LRA). On this page the biggest spike comes from the Refrigerator (top-freezer, ~16 cu ft): a station that only meets the running load will trip or stall when it starts. Data sources: U.S. DOE Energy Saver, ENERGY STAR certified products, manufacturer spec sheets.

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