DR Inverter Generator PRO-3500iO (3500 Watt)

  • $699.00
  • Save $100

Our Most Powerful Inverter Generator

Our DR PRO-3500iO is a “hybrid”, or open-frame, inverter generator. While it looks a bit more like a conventional portable generator, DR inverter technology makes it significantly quieter and lighter than any generator in its class.

And with Surge Starting™, you get the benefit of up to 50% more starting capacity, letting you start up and run additional devices that would overload many competitive products. This is a great unit for contractors who want to keep noise under control in residential neighborhoods.

Inverter vs. Conventional Generators

Inverters output AC current like conventional generators, but the current is then converted to DC voltage, and then “inverted” back to clean AC voltage. The result is cleaner power and a constant flow of current to your appliance. Inverters are well-suited to today’s sensitive electronics. And, best of all, they run much QUIETER than conventional generators.

DR PRO-3500iO Inverter 

Integrated Control Panel

DR PRO-3500iO Inverter

A. GENERATOR STATUS LIGHTS: Power, low-oil, and overload alerts

B. (2) 2.1A USB Ports

C. ECONOMY MODE: Provides excellent fuel economy and noise reduction

D. START DIAL: Choke, run and stop integrated into one easy to use control

E. 120V, 20A Duplex Outlet

F. PARALLEL READY: Connect 2 PRO-3500iO’s together for twice the power

G. 120V, 20A Twistlock Outlet


Length    19.3 in
Width     16.9 in
Height    16.4 in
Weight    74.3 lbs
Shipping Dimensions     19.8 in x 17.5 in x 18.1 in
Shipping Weight    80.7 lbs


Starting Type    Manual
Displacement    212 cc
Engine Type    OHV
Oil Capacity     0.6 qt
Lubrication   Splash
Oil Type   10W-30 / SAE 30
Cooling Methods    Air cooled

Fuel System

Fuel Capacity    2.37 Gal
Fuel Shutoff Valve   Yes

Generator Certifications

Generator CARB California   Yes

Generator Performance

Maximum Wattage    3500W
Run Time (50% Load)8 hrs
Rated Amps    25
Circuit Breaker Size    20 amp

Generator Power

Engine RPM    Variable
Frequency   60 Hz


Machine Warranty3 yrs Residential Use 1 yr commercial use
Engine Warranty3 yrs Residential Use 1 yr commercial use