Predator 3500 Inverter
Inverter Generator
$799

Predator (Harbor Freight)

Predator 3500 Inverter

4.8(10,800 reviews)

The cult classic of the RV world. The Predator 3500 has powered a decade of forum threads titled 'why pay Honda prices?' — 3,000 running watts, 57 dB super-quiet operation, electric start, and a digital readout for around $800, with periodic coupons taking it lower. Owners report five-plus-year lifespans with basic oil changes, and it starts 15k BTU RV ACs that make 2,200W units give up. Consumer Reports rates it surprisingly highly for noise and power quality. The trade-offs are well-mapped: 99 lbs with no folding handle makes truck-bed loading awkward, the oil fill is tilted and messy, carb varnish after storage is the top repair thread, the 90-day warranty is the shortest in the industry, and CARB-state buyers need the newer CO Secure version. Still the value benchmark for RV inverters.

Price
$799
Running Watts
3,000W
Fuel
Gasoline
Best For
RVers and tailgaters who want quiet AC-running power for the least money and accept a short warranty.

Specifications

Running Watts
3,000W
Starting Watts
3,500W
Fuel Tank
2.3 gal
Runtime
11 hrs @ 25% load (2.3 gal)
Type
Inverter Generator
Fuel
Gasoline
Noise
57 dB
Outlets
2x 120V 20A (5-20R), 1x 120V 30A RV (TT-30R), 12V DC
Transfer-Switch Ready
No
Weight
99 lbs
Warranty
90-day (extended plans available)
Model
59137

Highlights

RV-community cult favorite57 dB, starts 15k ACPerennial value benchmark

Pros

  • Runs 15k BTU RV air conditioners that stall smaller inverters
  • 57 dB is legitimately quiet for 3,000 running watts
  • Electric start with simple controls
  • 11-hour economy runtime
  • Ten years of owner-documented fixes for every known quirk
  • Frequent Harbor Freight coupons drop it under $600

Cons

  • 90-day warranty is the shortest in the category
  • 99 lbs with no suitcase handle or telescoping pull
  • Awkward tilted oil fill makes changes messy
  • Carburetor gumming after storage is the top complaint
  • No fuel gauge on older revisions; small 2.3-gal tank

Compare the Predator 3500 Inverter

Predator 9500 Inverter
$1,999
Inverter Generator

Predator (Harbor Freight)

Predator 9500 Inverter

4.8(2,900)

Harbor Freight's giant-killer. The Predator 9500 delivers 7,600 running watts of closed-case inverter power — EU7000iS territory plus 2,000 extra watts — at 40% of Honda's price, and the r/Generator consensus is that the hardware genuinely delivers: clean power, 67 dBA that's dramatically quieter than open frames, electric start, ESC economy mode, and 18.5-hour runtimes. Owners run whole homes through the L14-30R and an interlock. The catch everyone leads with: a 90-day warranty from a company whose service model is 'bring it to the store,' so buyers treat the extended protection plan as mandatory. Other realities from long-term threads: 257 lbs makes it the heaviest thing in its class, it's carbureted (store it dry), CO Secure occasionally false-trips in enclosed-ish spaces, and there's no dual-fuel option at this size.

7,600W inverter for $2k67 dBA closed-case quiet18.5-hour runtime
Gasoline7,600W running67 dBTransfer-Switch Ready
Best for: Value-driven whole-house backup buyers comparing against the EU7000iS and keeping the $3,000 difference.
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Champion 4500W Dual Fuel Inverter
$823
Inverter Generator

The people's RV generator. Champion's 200988 pairs 4,500 starting watts with dual-fuel flexibility and electric start at well under half of Honda money, and the review volume — thousands across Amazon, Walmart, and Camping World — is overwhelmingly positive. Owners confirm it starts 13.5k BTU RV air conditioners, sips propane for up to 21 hours on a 20-lb tank, and holds clean sub-3% THD power for electronics. At 61 dB it's audibly louder than a Honda or the iGen4500, more of a steady hum than a whisper, and the 103-lb body rides on small, hard wheels that owners wish were bigger. Recurring gripes: the electric-start battery dies if you don't tend it (there's a maintenance charger port for a reason), propane output derates to 3,150 running watts, and oil changes require a slight tilt-and-funnel dance.

Dual fuel + electric startRV-ready TT-30R outletHalf the price of big names
Dual Fuel (Gas/Propane)3,500W running61 dB
Best for: RV owners and tailgaters who want AC-starting power and propane flexibility at a working-person price.
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Westinghouse iGen4500
$849
Inverter Generator
4.7(6,500)

The RV community's favorite non-Honda: 3,700 running watts, a genuine 52 dB at quarter load, a telescoping suitcase handle, and an 18-hour economy-mode runtime that owners verify on long weekends. The digital display with remaining-runtime readout and the remote-start fob are the features people mention unprompted, and at half the cost of Honda's discontinued EU3000 it became the default. It starts most 15k BTU RV ACs, though owners at altitude or in high heat add a soft-starter to be safe. Grievances from long-term threads: the rear wheels are small for gravel campgrounds, the recoil backup start is awkwardly placed, carb gumming after storage is the top reliability complaint (fuel shutoff use is essential), and Westinghouse's parts/support pipeline can be slow. The DF dual-fuel variant had a fuel-filter leak recall in 2020 — this gas model wasn't affected.

52 dB with 18-hr runtimeRemote start + data displayRV-ready TT-30R
Gasoline3,700W running52 dB
Best for: RVers who want near-Honda quiet, AC-starting power, and long runtimes at a mid-tier price.
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