What Size Power Station or Generator Runs a 1,500W Portable Space Heater?
A 1,500 W portable electric space heater is a pure resistive load that draws 750 W on Low, about 900 W on Medium (or thermostat-cycled), and a full 1,500 W (12.5 A at 120 V) on High with no inductive start-up surge.
EcoFlow RIVER 2 Pro
Lowest upfront cost among verified LFP stations that clear the space heater's 900W starting surge.
EcoFlow DELTA Pro 3
Largest LFP battery reserve (4096Wh) for indoor zero-emissions backup.
Westinghouse iGen5000DF
Longest continuous tank endurance with 5000W starting headroom for multi-day grid failures.
Running 1,500w portable space heater alongside a refrigerator, medical device, or Starlink? Calculate coincident runtimes and inverter capacity in the Load Builder.
All 16 Tested Power Sources Ranked for 1,500W Portable Space Heater
| Rank & Source | Spec | Status | Surge Margin | Low | Typical Runtime | 12V DC / LPG | Price | Node |
|---|---|---|---|---|---|---|---|---|
| 768Wh · 800W | BOOST | +43.8% (1600W) | 51m | 48 MIN | — | $449 | Open → | |
| 1152Wh · 1800W | RUNS | +66.7% (2700W) | 1.3h | 1.1 HRS | — | $499 | Open → | |
| 1070Wh · 1500W | RUNS | +70% (3000W) | 1.2h | 1.0 HRS | — | $499 | Open → | |
| 1056Wh · 1800W | RUNS | +62.5% (2400W) | 1.2h | 1.0 HRS | — | $599.99 | Open → | |
| 1536Wh · 2200W | RUNS | +79.5% (4400W) | 1.8h | 1.5 HRS | — | $699 | Open → | |
| 1024Wh · 1800W | RUNS | +66.7% (2700W) | 1.2h | 59 MIN | — | $999 | Open → | |
| 2048Wh · 2400W | RUNS | +81.3% (4800W) | 2.4h | 2.0 HRS | — | $1,049 | Open → | |
| 2048Wh · 2400W | RUNS | +75% (3600W) | 2.4h | 2.0 HRS | — | $1,299 | Open → | |
| 2042Wh · 3000W | RUNS | +85% (6000W) | 2.4h | 2.0 HRS | — | $1,499 | Open → | |
| 3840Wh · 6000W | RUNS | +90% (9000W) | 4.6h | 3.8 HRS | — | $2,899 | Open → | |
| 4096Wh · 4000W | RUNS | +88.8% (8000W) | 4.8h | 4.0 HRS | — | $3,199 | Open → | |
| 3993Wh · 3600W | RUNS | +87.5% (7200W) | 4.7h | 3.9 HRS | — | $3,499 | Open → | |
| 3.4gal · 3900W | RUNS | +82% (5000W) | 20.4h | 18.7 HRS | 21.7h (LPG) | $949 | Open → | |
| 2.25gal · 3500W | RUNS | +80% (4500W) | 15.1h | 13.8 HRS | 19.6h (LPG) | $999 | Open → | |
| 8.3gal · 10500W | RUNS | +93.1% (13000W) | 17.8h | 17.1 HRS | 12.9h (LPG) | $1,299 | Open → | |
| 0.95gal · 1800W | RUNS | +59.1% (2200W) | 6.0h | 5.4 HRS | — | $1,347.99 | Open → |
BENCHMARK_MODELS // 1,500W PORTABLE SPACE HEATER
120 V resistive heater with three manual power levels: ~700 W Low, 900 W Medium, and 1,500 W High
120 V fan-forced resistive space heater with 750 W Low, 1,125 W Medium, and 1,500 W High settings
REVERSE_SIZER_QA // VERIFIED ANSWERS
What size power station or generator do I need for a space heater?
To run a space heater reliably across all scenarios, choose a power source rated for at least 1500 W continuous output and 1500 W peak starting surge (typical draw is 900 W running / 900 W surge, averaging 900 W over time).
What is the best budget power station for a space heater?
The lowest-cost verified station in our database that runs a space heater is the EcoFlow RIVER 2 Pro ($449), delivering about 48 minutes on AC.
Which battery station gives the longest runtime for a space heater?
The EcoFlow DELTA Pro 3 (4096 Wh) delivers the longest single-charge battery runtime at about 4 hours.