How much power does the PowerSmart MB5040DC give you?
On gas, this model is rated for 3,600 running watts and 4,400 starting watts. Running watts are the power available while your appliances are on. Starting watts are a short burst to help things like refrigerators and pumps turn on. You cannot use that bigger number for appliances that need steady power.
On propane, you get 3,300 running watts. That is 300 fewer watts than on gas.
| Fuel | Running watts | Starting watts |
|---|---|---|
| Gasoline | 3,600 W | 4,400 W |
| Propane | 3,300 W | 4,000 W |
Is this model a good fit for you?
This model has a pull starter, two fuel options, and carbon monoxide safety shutoff. It provides 3,600 running watts on gas or 3,300 on propane. It is an open-frame inverter with 120V output.
The listing, manufacturer page, and manual disagree on the tank, weight, and propane runtime. Use the manual's gasoline half-power use runtime when planning, and ask about the propane figure. The 76 dBA claim at 23 feet does not say how much power was being used, so it cannot be compared fairly with a small generator tested under a lighter power use.
The details for this model
Model: MB5040DC. Manufacturer part number: MB5040DC. These are published specifications, not results from our own testing. If a detail is missing, we leave it marked rather than use a number from a similar generator.
A detail to confirm: Tank capacity is 1.6 gallons in the matching manual versus 1.7 gallons on the official page. Weight is 65 lb. in the manual, 69 lb. on the official page and 68 lb. in Amazon’s table; the weight basis is not adequately reconciled. Amazon says 24 propane hours at 25% power use, but the current official page says approximately 6 hours from a 20 lb. cylinder without matching power use conditions. No reliable propane runtime comparison is asserted. Package dimensions are not presented as unit dimensions.
- How it starts
- Pull cord
- Voltage
- 120V
- Gas tank
- 1.6 US gal. in matching manual; current official page says 1.7 gal.
- How long it runs
- 5.1 hours at 50% gasoline power use; propane runtime evidence conflicts and is not used for planning
- Weight
- Not confirmed for this model
- Size (L × W × H)
- Not confirmed for this model
- Outlets
- Two 120V 20A household outlets; 120V 30A locking outlet; 12V DC 8A; parallel ports
- Generator type
- Inverter
- Power smoothness (THD; lower is generally smoother)
- Below 3% claimed on official product page; load conditions not provided
- Carbon monoxide shutdown
- CO alarm and automatic shutdown documented; low-oil and overload protection
- Noise
- 76 dBA sound pressure at 23 feet; load not stated
- Warranty
- 2-year limited home-use warranty; 90 days professional/commercial use; full exclusions and prepaid transport terms apply
A 120V outlet powers ordinary household plug-in devices. Some pumps and larger equipment need 240V. Inverter models use electronics to control the electricity they supply. THD measures how smooth that electricity is; a lower number generally means smoother power. Check your device instructions before connecting electronics.
Sources: PowerSmart MB5040DC official specifications · Matching manufacturer owner manual · Exact Amazon listing and variant identification ↗ ·
How long will it run?
The published runtime is 5.1 hours at 50% gasoline power use; propane runtime evidence conflicts and is not used for planning. The listed gas tank holds 1.6 US gal. in matching manual; current official page says 1.7 gal. The more power you use, the sooner you will need fuel. A runtime measured at 25% load means the generator was only supplying a quarter of its running power, not working flat out.
Propane gives you another fuel option. Follow the manual for the regulator and cylinder size. A small cylinder may not supply enough fuel in cold weather. Read our fuel-storage guide →
What can you run during an outage?
Start by listing the appliances you need most. Check both their running watts and the extra power they need to start. A refrigerator, for example, may need much more power for a moment when its compressor kicks on.
Here is an example, not a test of this generator: a refrigerator using 600 running watts, plus 100 watts of lights and 100 watts for a router and other small devices, adds up to 800 watts. If that refrigerator needs 1,800 watts to start, the total briefly reaches 2,000 watts. Your appliances may use different amounts.
That example is within the listed gasoline running and starting ratings. You still need to check your own refrigerator, each outlet’s limit, and anything else that may turn on at the same time. If you use propane or natural gas, check those ratings separately.
A 1,500-watt heater uses a lot of power on its own. Follow its connection instructions; many portable heaters must plug directly into a suitable wall outlet. This review does not confirm 240V output for this model. Do not choose it for a 240V pump or air conditioner without checking that first. Work out how much power you need →
What we like and what to consider
Reasons to consider it
- Runs on gas or propane.
- 3,600 running watts on gas.
- Inverter design, which can be useful for compatible electronics.
Things to keep in mind
- Confirm its weight before planning how to move it.
- Switching to propane reduces running power to 3,300 watts.
- Noise figures depend on the distance and how hard the generator is working.
What owners are saying
Some customers describe shipping damage, including a broken frame or choke handle. Others say it runs well on gas and propane. One post reports a leaking propane hose, but that does not establish a problem across all units. Inspect the generator when it arrives and follow the manual’s propane leak-check instructions.
- Customer reviews for MB5040DC
- Customer reviews for MB5040DC
Starting, moving, and maintenance
The listed starting options are: pull cord. Practice starting it before an outage so you know you can use it when needed. Check its weight and size before deciding where to store it.
The listed warranty is 2-year limited home-use warranty; 90 days professional/commercial use; full exclusions and prepaid transport terms apply. Read the full terms, including whether your seller and intended use are covered. Follow the manual for oil type, oil changes, and storage. Keep track of running hours during a long outage. See our maintenance guide →
Other generators to compare
Westinghouse WGen3600cv →
This gas generator provides 3,600 running watts for 120V appliances and starts with a pull cord. It weighs about 100 pounds and does not include wheels, so think about where you will store and move it. It cannot power 240V appliances.
3,600 running watts on gas · Gasoline · 120V
Westinghouse WGen3600DFcv →
This 120V generator runs on gas or propane and provides 3,600 running watts on gas. It starts with a pull cord and weighs 104.7 pounds without fuel. Make sure you can move and start it comfortably.
3,600 running watts on gas · Dual fuel · 120V
Westinghouse WGen3600DFc →
This 120V generator adds remote electric starting and wheels to a gas-and-propane setup. It provides 3,600 running watts on gas and weighs 121.1 pounds without fuel. Check whether its power output suits any sensitive electronics you want to run.
3,600 running watts on gas · Dual fuel · 120V
Questions about the PowerSmart MB5040DC
How much running power does it provide?
3,600 watts on gasoline; 3,300 watts on propane. Starting watts are only available briefly, not for steady use.
Is it an inverter generator?
Yes, this model is listed as an inverter generator. Its published power-distortion figure (THD) is Below 3% claimed on official product page; load conditions not provided. Check your electronics’ power requirements before connecting them.
Can I use it in a garage if it has CO shutdown?
No. Never run a generator in a garage, even with the door open. Use it outdoors at least 20 feet from homes and openings, with exhaust pointed away. Carbon monoxide shutdown is extra protection; it does not make indoor use safe.
Can I connect it to my house?
Check the voltage and outlets before planning a home connection. Have an electrician choose and install the right transfer equipment and check the generator’s wiring setup. Never connect a generator to a household wall outlet.
Should you consider the PowerSmart MB5040DC?
This open-frame inverter runs on gas or propane and uses a pull starter. It provides 3,600 running watts on gas or 3,300 on propane, and includes carbon monoxide shutdown. It is 120V only, so it cannot run 240V appliances.
Check Price on AmazonWhere the information comes from
We use the sources below to compare specifications and features. We have not personally tested this generator.
- PowerSmart MB5040DC official specifications
- Matching manufacturer owner manual
- Exact Amazon listing and variant identification ↗
- CDC generator safety guidance ↗
- How we put our reviews together