Model RY904500The Ryobi RY904500 is a 3600-watt portable gasoline generator, delivering 4500 starting watts. It features a 212cc OHV engine, a 4-gallon fuel tank providing up to 10 hours of runtime at 50% load, and is RV-ready with a 120V 30A RV outlet.
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Here's the quick tradeoff view — what this model does well, and where it may not fit.
The Ryobi RY904500 is a gasoline generator rated at 3600 running watts with 4500 starting watts. That combination focuses on steady output for ongoing use while also providing extra headroom for startup demands that can momentarily require more power.
Because it runs on gasoline, the RY904500 fits buyers who want a conventional fuel option paired with a midrange wattage level that can support a variety of portable power needs.
With 3600 running watts and 4500 starting watts, the RY904500 is built to handle continuous loads while also accommodating higher initial draw when equipment first kicks on. It is rated at 82 dBA for noise level, which sets clear expectations for how loud it will be during operation.
Runtime is listed at 10 hours at 50 percent load, giving a concrete benchmark for sustained use when the generator is not being pushed to its full output. It uses gasoline and carries a 4-gallon fuel tank, tying that 50 percent load runtime to a defined onboard fuel capacity.
At 115 lbs, the RY904500 lands in a weight range where moving it is a deliberate task rather than a grab-and-go lift, especially when you are repositioning it around a driveway, jobsite, or campsite. Its dimensions of 24 x 26 x 20 inches also help frame how much space it occupies when stored or transported.
Those measurements make it easier to plan for fit in a garage corner or vehicle cargo area, while the overall mass reinforces that this is a substantial portable unit rather than a compact lightweight option.
Starting is handled through a recoil starting system, keeping operation straightforward and fully manual. The generator is EPA compliant, and it includes a spark arrestor, which adds a defined safety-oriented feature set for use where spark control matters.
For connection and protection details, the RY904500 is RV ready, and it also includes covered outlets to help shield connections when the generator is set up outdoors. Automatic voltage regulation is built in through AVR, supporting more controlled output behavior, and the package is backed by a 3-year warranty.
Needs 240V output
Needs 240V output
Needs 240V output
Needs 240V output
Est. running: 1,800W
Peak surge (single motor): 2,000W
Avoid starting multiple motor loads at the same time.
Est. running: 2,500W
Peak surge (single motor): 1,200W
Avoid starting multiple motor loads at the same time.
Est. running: 1,600W
Peak surge (single motor): 2,800W
Avoid starting multiple motor loads at the same time.
These are estimates using typical wattage assumptions. Real appliances vary. Startup surges can be 2–6× the running wattage for motor-driven loads. 240V loads require a 120/240V generator and proper connection. Use a transfer switch or interlock kit; never backfeed a panel.
Ryobi is a renowned brand known for its affordable and innovative power tools and outdoor equipment, including generators for residential and light commercial use.
| Fuel | Running | Starting | Runtime @50% | Runtime @25% |
|---|---|---|---|---|
| Gasoline | 3600W | 4500W | 10h | Not available |
| Running Watts | 3,600 watts |
|---|---|
| Starting Watts | 4,500 watts |
| Starting Watts (Gasoline) | 4,500 W |
| Running Watts (Gasoline) | 3,600 W |
| Engine | 212 cc OHV 4-stroke |
|---|---|
| Engine Type | OHV 4-stroke |
| Engine Displacement | 212 cc |
| Spark Arrestor | Yes |
| Emissions Compliance | EPA |
| Voltage (AC) | 120 |
|---|---|
| Running Amps | 30 A |
| Peak Amps | 37.5 A |
| AC Frequency | 60 hz |
| Current | 30 amps |
| GFCI Outlets | No |
| AC Outlets | 2x Duplex 120V 20A (5-20R) 1x 120V 30A (TT-30R) |
| Dimensions | 24 x 26 x 20 inches |
|---|---|
| Weight | 115 lbs |
| Emissions Compliance | EPA |
|---|---|
| Automatic Voltage Regulation | Yes |
| Automatic Voltage Regulator | Yes |
| Carbon Monoxide Sensor | Yes |
| Covered Outlets | Yes |
| Fuel Gauge | No |
| Fuel Tank Capacity | 4 gallons |
| Included Accessories | Oil and wheel kit |
| Indicators | No |
| Inverter | No |
| Noise Level | 82 dBA |
| Overload Protection | Low oil and overload protection |
| Parallel Capable | No |
| Recoil Start | Yes |
| RV Ready | Yes |
| Starter Type | Recoil |
| Starting System | Recoil |
| UPC | 46,396,056,023 |
| Warranty | 3 years |
| Wheels | Yes |
| Fuel Type | Gasoline |
|---|
| Runtime @ 50% | 10 hours |
|---|---|
| Runtime @ 50% Load (Gasoline) | 10 hours |
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