# Generac GP3000i vs Predator 3500 (Item 71358): specs and price compared

A sourced, side-by-side comparison of the Generac GP3000i (Generac) and Predator 3500 (Item 71358) (Predator (Harbor Freight)) among portable generators. Generac GP3000i is the cheaper of the two at $799.

## Side by side

| Spec | Generac GP3000i | Predator 3500 (Item 71358) |
| --- | --- | --- |
| US price | $799 | $799.99 |
| Brand | Generac | Predator (Harbor Freight) |
| 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 |

## Key differences

- 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

**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.)

## Sources

- Generac GP3000i: https://generatorbible.com/generators/generac/7129-gp3000i/ (generatorbible.com, verified 2026-06-19)
- Predator 3500 (Item 71358): https://www.harborfreight.com/3500-watt-super-quiet-inverter-generator-with-co-secure-technology-49-state-compliant-71358.html (harborfreight.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/portable-generators/generac-gp3000i-vs-predator-3500-71358/
Cite: Per The Front Desk Review, Generac GP3000i ($799) vs Predator 3500 (Item 71358) ($799.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/portable-generators/generac-gp3000i-vs-predator-3500-71358/
License: CC BY 4.0.