One powers your essentials for a weekend. The other powers your whole house without you lifting a finger. Here's how to choose.
The honest differences that matter when buying.
| Factor | Portable generator | Standby generator |
|---|---|---|
| Upfront cost | $500 – $2,500 (unit only) | $6,000 – $20,000+ installed |
| Installation | None — roll it out, plug in | Licensed electrician, permits, transfer switch |
| Power range | 2,000 – 12,000 watts | 10,000 – 26,000 watts |
| Starts | Manual — you start & fuel it | Automatic in under a minute |
| Fuel | Gasoline (refuel every 8–12 hrs) | Natural gas / propane — continuous supply |
| Noise | Loud (60–75 dB) | Quieter (55–65 dB), further from house |
| Maintenance | Minimal — oil, filter, monthly run | Annual pro service + weekly self-tests |
| Lifespan | Fewer total hours, years of occasional use | 10–15+ years with maintenance |
| Safety | Must run outdoors; CO risk if misused | Pro-installed, enclosed, auto shutoffs |
| Best for | Short outages, essentials, tight budgets | Whole-house, frequent/long outages, peace of mind |
Your wattage number points at the type automatically.