This product was discontinued. For your convenience, we decided to leave this page up.
If you were looking to purchase it, you may want to have a look at the Westinghouse WGen12000, which has similar specs.
You can also try to find it second hand on eBay, by clicking on the button below.
Zoom on the Cat RP12000 E
In a nutshell, the Cat RP12000 E is a powerful portable generator mostly geared towards professionals who want to ensure that a power failure will not prevent them from working.
Power & Run Time
The Cat RP12000 E's design includes a gasoline-fueled 670 cc Rato OHV V-Twin engine. With a 120/240V output, it gives a running wattage of 12,000W and also a peak wattage of 15,000W.
This generator gets running thanks to a simple and elegant electric starter (battery included).
Thanks to a fuel capacity of 13.2 gallons, the RP12000 E can operate for around 11.7 hours at 50% load with a full tank (fuel consumption around 1.13 GPH).
Delicate electronics can be plugged in an AC outlets safely, as the RP12000 E generates a clean sine wave, reaching a <5% Total Harmonic Distortion (THD).
The control panel features the following 8 AC outlets:
It also sports 1 DC outlet: there's a 12V 8A (cigarette lighter style) receptacle with which you may charge your batteries with ease.
While this Cat generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor. Besides, as it features a twist-lock L14-30R receptacle, the RP12000 E is transfer switch ready: in case of a power outage, you will be easily able to connect it to a breaker box and power your household.
The Cat RP12000 E has the following dimensions: L35.7 x W32.7 x H35.8 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. This type of design is ideal for tough environments and heavy outdoor use.
Although this generator is technically considered 'portable' (in the sense that it can be moved), its 350 lbs make it incredibly difficult to manually lift and transport. Still, once it is on the ground, its wheel kit and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.
A lift hook located on the top of the frame offers an additional safety feature while facilitating the transport, loading and unloading of the generator.
The RP12000 E's control center features a convenient meter showing you voltage, frequency and lifetime hours to aid you with the monitoring of its status and activity. To offer you even more control and easy operation during nighttime, the panel is LED-lit.
The generator includes a built-in fuel gauge, a quick, easy and convenient method of checking the device’s gas level.
From a security point of view, the generator is equipped with an overload protection (circuit breaker) and an automatic low oil shut-off, giving you a peace of mind during use.
Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Cat RP12000 E also is packed along with the following accessories: tool kit, oil, battery charger and funnel.
The Cat RP12000 E is EPA-approved and CARB-compliant. Thus, selling and purchasing this generator is allowed in each of the 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.
The Cat RP12000 E versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Cat RP12000 E compare to generators of similar power (between 10000 and 14000 W).
- Considering its dry weight of 350 pounds, the Cat RP12000 E is one of the heavier generators producing between 10000 and 14000 running watts. In terms of weight, one of the champions in their power range is the A-iPower SUA13000EFI, standing at just 218 lbs.
- Since the RP12000 E boasts with a run time of around 11.7 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Powerhorse 13000ES, reaching around 15 hours.
- Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This generator is somewhat less fuel efficient than devices of comparable output: its estimated fuel consumption reaches 1.13 GPH at a 50% load. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.78 GPH, the A-iPower SUA13000EFI is a device you could look out for.
The bottom line
- Illuminated control panel
- Several accessories included
- GFCI Outlets
- Impressive quantity of AC outlets
- 4 different AC outlet types
- Electric start
- Clean sine wave
- High run time
- No recoil back-up
- No remote start
- On the heavy side (350 lbs)
- Low fuel efficiency
Features and Specifications
|670 cc Rato OHV V-Twin
|AC: 120/240V 60 Hz, DC: 12V
|Running amps (@120/240V)
|Peak amps (@120/240V)
|Run time @50% load
|Run time @25% load
|Automatic Voltage Regulation
|1x 12V 8A (cigarette lighter style)
|Metal, 13.2 gal
|Approx. dimensions (L x W x H)
|35.7 x 32.7 x 35.8 in
|Noise (lower limit)
|Low oil and overload protection
|Bonded to frame
|Oil, funnel, tool kit, battery charger, battery, and wheel kit
|Other model numbers
Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.
Caterpillar Inc., often abbreviated as simply CAT, is an American engineering corporation, whose product range includes machinery, engines, financial products, mobile phones and of course, power generators. The company, founded in 1925, is one of the backbones of the US Dow Jones index and is placed among the Fortune 500 list. While CAT mainly focuses on industrial scale generators, it also provides a wide range of portable and household-scaled devices. CAT portable generators were engineered and designed in Mossville, Illinois, and Belfast, Northern Ireland. However, their production was outsourced to China.
The Cat RP12000 E is covered under a warranty for up to 2 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Cat generators, please consult Cat's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-PWR-ME-UP (844-797-6387).
Questions & Answers
What can it power?
|Sump pump (1/2 hp)
|Furnace fan (1/2 hp)
|Refrigerator (energy star)
|Electric fence (25 miles)
What is the thd of this unit? (Asked April 28, 2020)
As indicated in the table above, the THD is <5%.
Who makes the cat rp12oooe engine (Asked January 30, 2021)
The engine is manufactured by Rato.