Firman WH03662OF - 3650/4500W Dual Fuel Open Frame Inverter Generator With Electric Start

In a nutshell, the Firman WH03662OF is a portable inverter generator mostly geared towards:

• RV travellers looking for even more independence
• People occasionally participating in outdoor fairs, festivals or events
• Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
• Camping and tailgating buffs looking to enhance their experience

The subsequent sections will explore in detail its power characteristics, the diverse outlets it provides, its overall portability, and the supplementary features it offers.

Power & Run Time

The Firman WH03662OF

Featuring dual-fuel technology, the Firman WH03662OF provides 120V, and offers both power and versatility. Running on gasoline, it delivers a running wattage of 3,650W and a starting wattage of 4,500W. When propane-powered, it offers 3,300 running watts and 4,100 starting watts. Moreover, the parallel capability (parallel kit not included) enables increasing of power output when paired with another similar or compatible unit, providing increased energy capacity and versatility for a wide range of needs.

Enjoying a noise rating of 69 dBA (less noisy than a normal conversation), this inverter generator can be started thanks to a traditional recoil pull-start mechanism, but also to an intuitive and practical electric starter (battery included).

The running time of the WH03662OF, with its 6 gallons fuel capacity, can reach up to 22 hours on a full tank of gasoline (fuel consumption around 0.27 GPH). With propane, it can reach up to 12 hours (estimation based on a 20 lbs tank - propane consumption around 0.39 GPH).

The WH03662OF generates a clean sine wave: providing <3% Total Harmonic Distortion (THD), delicate electronics can be plugged in its AC outlets safely.

Outlets

The control panel includes the following 4 AC outlets:

Moreover, it comes equipped with 3 DC outlets: there's two 5V USB ports (USB-A) designed for hassle-free charging of various electronic devices such as smartphones and tablets, ensuring uninterrupted usage and a 12V 8A (cigarette lighter style) receptacle providing easy battery charging capabilities.

If you own an RV with a 50-amp service, you can consider this Firman unit as RV-ready, as it features a 14-50R outlet. Its L5-30R receptacle can also be used for a simple RV connection with the included L5-30P to TT-30R adaptor.

Important note: The 14-50R outlet is normally 120/240V. However, this unit does not produce 240V. This outlet is here for your convenience, but should only be used to power 120V appliances. In addition, since the generator provides a maximum of 3650 running watts, it will not be possible to draw the full 50 amps from the outlet.

Portability

At L24.5 x W24.1 x H23 in, the Firman WH03662OF boasts a traditional open frame structure, ensuring stability and allowing for convenient maintenance access to components, promoting air circulation. The generator is designed for outdoor use and demanding environments.

With a weight of 119 lbs, the generator is still labeled as 'portable,' denoting its ability to be moved, although its heaviness might restrict easy portability. Still, once it is on the ground, its set of wheels (⌀9") and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.

Features

The WH03662OF's control panel

The WH03662OF's control center features a convenient meter, showing voltage, frequency, and lifetime hours metrics to aid you with the monitoring of its status and activity.

In addition to this info, the device's light indicators will illuminate to indicate if the generator is ready, its oil levels are insufficient and the generator is on overload.

Thanks to its built-in fuel gauge, the inverter generator allows you to quickly, conveniently, and easily check the gas level at a glance.

Considering security aspects, the generator boasts an automatic low oil shut-off and an overload protection (circuit breaker), offering peace of mind throughout operation.

The WH03662OF also benefits from Firman’s CO Alert carbon monoxide shutdown, which automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a CO Alert fault occurs.

Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Firman WH03662OF also is packed along with the following accessories: funnel, oil, battery charging cables, tool kit, propane hose and RV adapter.