Generac
Generac GP3000i
$799Cheaper
Best Portable Generators · head-to-head
Generac GP3000i vs Predator 3500 (Item 71358)
A sourced, side-by-side comparison. Generac GP3000i is cheaper at $799. Every spec and price links to its source.
Predator (Harbor Freight)
Predator 3500 (Item 71358)
$799.99
Which is better: the Generac GP3000i or Predator 3500 (Item 71358)?
The Generac GP3000i wins 1 of the 1 specs we compare head to head; the other wins 0. The Generac GP3000i is the cheaper at $799. The Generac GP3000i both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Generac GP3000i | Predator 3500 (Item 71358) |
|---|---|---|
| US price | $799 | $799.99 |
| Brand | Generac | Predator (Harbor Freight) |
| Released | — | — |
| Type | inverter | inverter |
| Running watts | 2300 | 3000 |
| Peak watts | 3000 | 3500 |
| Fuel | gas | gas |
| Runtime hours | 5.8 | 11 |
| Noise dba | — | 56 |
| Weight (lb) | 59.5 | 102 |
| Outlets | 1×120V 20A duplex (5-20R), 1×120V 30A (L5-30R), 2×5V USB | 2×120V 20A (5-20R), 1×120V 30A (L5-30R), 1×12V DC, 1×5V USB |
| Release year | — | — |
Sources — Generac GP3000i: generatorbible.com (verified 2026-06-19). Predator 3500 (Item 71358): harborfreight.com (verified 2026-06-19).
What's the difference between the Generac GP3000i and Predator 3500 (Item 71358)?
Where the two actually differ on the specs we track (5 of 8). Matching specs are omitted.
- Running watts: Generac GP3000i 2300 vs Predator 3500 (Item 71358) 3000
- Peak watts: Generac GP3000i 3000 vs Predator 3500 (Item 71358) 3500
- Runtime hours: Generac GP3000i 5.8 vs Predator 3500 (Item 71358) 11
- Weight (lb): Generac GP3000i 59.5 vs Predator 3500 (Item 71358) 102
- Outlets: Generac GP3000i 1×120V 20A duplex (5-20R), 1×120V 30A (L5-30R), 2×5V USB vs Predator 3500 (Item 71358) 2×120V 20A (5-20R), 1×120V 30A (L5-30R), 1×12V DC, 1×5V USB
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Generac GP3000i
Only one whitelisted tester, Outdoor Life, published genuine hands-on prose on the Generac GP3000i, naming it 'Best for RV Camping' in its 2026 inverter-generator roundup. The reviewer field-used the unit during a real multi-day outage, praising quiet operation, reliable pull-starting after long storage, and clean power safe for sensitive electronics, but flagged it as underpowered for home backup and cumbersome to carry with a full tank. All figures cited are manufacturer specs, not independent lab measurements. (1 sourced review.)
Praised: Reliable pull-start, even after months of storage (3-4 pulls); Quiet operation and clean power safe for sensitive electronics; Portable for one person; ran a chest freezer through a multi-day outage.
Flagged: Underpowered for home backup; Cumbersome to carry with a full tank; Pull-start only, more labor-intensive than electric ignition.
Predator 3500 (Item 71358)
No sourced tester review yet.