Cummins Onan QG series

Onan 4.0HGLBA-8306

4,000-watt RV genset, gasoline, 120V. The generator most coaches are built around.

Representative manufacturer image of the range. Enclosure finish, color and dimensions vary by model and configuration — see the specifications below for this unit.

4,000W Gasoline 120V · 33.3A 30A CARB compliant

Onan is the genset the RV industry standardized on, which has a practical consequence beyond brand preference: parts, filters and service documentation are available everywhere, and any competent RV shop in the country has worked on one. That is worth real money the first time something fails three states from home.

At 4,000 watts this unit will run one 13,500 BTU rooftop air conditioner plus lights, converter and small appliances. Air conditioning is almost always the deciding load in a coach, and the surge at startup - not the steady draw - is what sets the requirement.

Installation into a coach depends on the chassis: whether a generator bay already exists, how the fuel pickup is arranged, and how exhaust is routed. We can quote installation locally, or ship the unit to your shop.

Pricing

Price on request

We are confirming published pricing for this line with the distributor. Call or send an enquiry and we will quote it directly.

Part number	A073X541
Output	4,000 W
Amperage	33.3 A
Voltage	120 V · 60 Hz
Fuel	Gasoline
Breaker	30A
CARB	Compliant

Check availability Or call (214) 957-4307

Questions about the 4.0HGLBA-8306

How much is the Onan 4.0HGLBA-8306?

We quote the 4.0HGLBA-8306 directly rather than listing a price. Call or send an enquiry and we will give you a number for the genset, and separately for fitting it if you want that done here.

Will the 4.0HGLBA-8306 run my RV air conditioning?

At 4,000 watts it will run one 13,500 BTU rooftop air conditioner plus lights, converter and small appliances. Rooftop air conditioners draw a large surge on startup, so the practical limit is usually the starting load rather than the running load. A soft-start module on the AC changes that math considerably and is often cheaper than moving up a generator size.

What fuel does the 4.0HGLBA-8306 use?

Gasoline. It draws from the coach gasoline tank, so there is nothing extra to fill.

Is the 4.0HGLBA-8306 CARB compliant?

Yes, this model is CARB compliant, so it can be sold and registered in California and in states that follow California emissions rules. If you travel or plan to sell the coach out of state, that matters.