Rainier R12000DF Portable Generator Review

Rainier R12000DF is a dependable portable generator that runs on both gasoline and propane. It is a robust and versatile generator that can be used for both indoor and outdoor use. It is both a transfer switch and an RV-ready generator. It is both EPA compliant, and CARB approved, produces great power, and has GFCI outlets and other basic safety features.

Rainier R12000DF power station


Generator Type: Rainier R12000DF is an open frame portable conventional generator. It is a great source of reliable energy for your home as well as the work area. Also, travelers can make use of this generator to power their recreational vehicles or campers.

Dual Fuel Technology: It is a dual fuel generator, so you can choose between gasoline and propane to keep your home essentials running during outages.

A fuel selector switch is available that allows you to easily and safely switch between the two fuel options.

Portability: Rainier R12000DF is a heavy unit, weighing 196 pounds. So, it is not easy to manually lift the generator. But, once you put it on the ground, its drop-down handles and 10-inch everlasting wheels allow easy movement on different kinds of surfaces.

It is 24.5 inches wide, 24 inches in height, and 29 inches in length.

Starting Method: Its easy-to-use electric start switch makes starting simple and easy. Also, you have a recoil start mechanism as a backup.

Engine: It comes with a powerful 457cc, 4-stroke Rainier OHV engine. A durable powder-coated frame provides ultimate protection to the engine.

Power Output: If you are using gasoline, this generator can produce 12,000 watts of starting power and 9500 watts of running power. But if you are out of gas and need to switch to propane, you will get 10,800 starting watts and 8550 running watts.

This output power is enough to run your kitchen appliances, air conditioner, tools, sump pump, and other small items simultaneously.

THD Rating: Rainier R12000DF is not an ideal generator to power sensitive electronic devices. The reason for that is its higher THD (Total Harmonic Distortion) rating (<23%).

This THD rating shows that the harmonic distortion present in the signal is quite higher. And the sensitive electronics can’t handle this much distortion.

Fuel Storage Capacity: It has a gasoline storage capacity of 6.6 gallons. A built-in fuel gauge is right there on the top of the tank to help users check the remaining fuel level quickly.

Run Time: Your generator can easily run up to 17 hours at 25% load and 12 hours at 50% load on a full 6.6-gallon gasoline tank. And with a 20-pound propane tank, you will get a runtime of up to 11 hours at 25% load.

The gasoline consumption of Rainier R12000DF is around 0.39 gallons per hour, but its propane consumption is 0.43 gallons per hour.

Noise Level: It is a loud generator with an operational sound of 74 dBA.

Power Receptacles: Its power panel is featured with five AC outlets, but there is no DC outlet.

Two are the 120 Volt 20 Ampere (5-20R) outlets with GFCI (Ground Fault Circuit Interruption) protection. These GFCI outlets protect users from electrocution. They react immediately upon detecting only 0.005 amperes of imbalance in current and break down the circuit to save users from life-taking electric shocks.

Other than these GFCI outlets, there is a 120 Volt 30 Ampere (L5-30R) receptacle, one 120/240 Volt 30 Ampere (L14-30R) receptacle, and one 120/240 Volt 50 Ampere (14-50R) receptacle.

You can consider this generator as RV-ready because of a 14-50R outlet’s availability if you have a recreational vehicle featuring a 50 Ampere service.

Also, this unit is transfer switch ready because of the L14-30R outlet. Use this receptacle to directly plug R12000DF into your home’s manual transfer switch. It will help you to keep running your home appliances during power outages.

VFT Data Center: VFT Data Center is a handy feature. It shows the Voltage, Frequency, and Total Runtime of the Rainier R12000DF. It helps users to monitor the generator’s status.

Safety: For the generator’s safety and your connected appliances, there are low-oil shutdown, overload protection, spark arrestor, and GFCI protection features.

Users are allowed to use this unit in forested areas because of the spark arrestor. No sparks are allowed to come out of the engine to cause a fire.

The low-oil shutdown is one of the basic safety features. When the oil level goes too down, it automatically switches off the engine.

Overload protection protects the generator from overloading. It also shuts off the engine when the generator comes under extra load.

Emissions: Rainier R12000DF plays its part in controlling air pollution. It is both EPA (Environmental Protection Agency) and CARB (California Air Resources Board) approved.

Warranty: A 3-year limited warranty

Rainier R12000DF vs. DuroMax XP12000EH vs. Pulsar G12KBN vs. A-iPower SUA12000ED



  Rainier R12000DF


DuroMax XP12000EH


Pulsar G12KBN


A-iPower SUA12000ED
Peak/Rated Watts (Gas) 12000W/9500W 12000W/9500W 12000W/9500W 12000W/9000W
Peak/Rated Watts (Propane) 10800W/8550W 10200W/8075W 10800W/8550W 10000W/8000W
Gas Tank Size 6.6 gal. 8.3 gal. 8 gal. 7 gal.
Propane Tank Size 20 lbs. 20 lbs. 20 lbs. 20 lbs.
Runtime (Gas) 12 hrs (1/2 load) 9 hrs (1/2 load) 12 hrs (1/2 load) 8.5 hrs (1/2 load)
Runtime (Propane) 5.5 hrs (1/2 load) 4 hrs (1/2 load) 5 hrs (1/2 load) 10 hrs (1/2 load)
Noise 74 dBA  72 dBA 76 dBA 69 dBA
Starting Mechanism Recoil, Electric Recoil, Electric Recoil, Electric Recoil, Electric
Weight 196 lbs. 221 lbs. 209 lbs. 242 lbs.

My Opinion:

Pros: Rainier R12000DF is a dual fuel transfer switch ready generator. It is quite a powerful unit, featuring GFCI-protected outlets and an electric start system. It is fuel-efficient, easy to transport, and has a VFT data center.

Cons: It has a limited fuel tank size. Also, it is on the noisy side.


What items can you power at home simultaneously with Rainier R12000DF?

Rainier R12000DF is a powerful generator, so you can easily power a variety of items together.

You can run an air conditioner of 10,000 BTU, a 1000-watt microwave, an electric frypan, dishwasher, and a sump pump (1/2 HP) along with a refrigerator, slow cooker, and LED light bulbs.

It is just an example of the items that you can power at the same time. You can power anything you want at home during outages but never try to exceed the power capacity this generator has.

How can you perfectly maintain this generator?

There are various things which you need to do in order to keep this generator in perfect condition.

  • Before every use, check the engine oil level. Change it after the first 20 hours of use and then every 50 hours or 6 months of use.
  • Check the air filter before every use. Never forget to clean it every 50 hours or 6 months of use. And after 300 hours of use, replace the air filter.
  • Inspect and clean the spark plug after 100 hours of operation. And then replace it after 300 hours of use.
  • Spark plug also needs to be inspected and cleaned every 100 hours of use.
  • Moreover, never forget to check and clean the fuel filter every 6 months.

Does Rainier R12000DF come with a DC outlet?

It has five AC outlets, but there is no DC outlet.

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