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I’ve been testing three popular portable inverter generators side by side — the WEN 3600 (56360i), the PowerSmart 3600, and the AMERISUN 3800 — all with CO sensor options. The WEN weighs just 46.3 pounds and offers a three-year warranty, while the PowerSmart and AMERISUN both promise up to 10 hours of runtime from similar 149cc engines.
If you’re shopping for a quiet generator that’s safe to use near your RV or campsite, this comparison is for you. The big trade-off here is power output versus price and features — and I’ll show you exactly which one saves you money without skimping on safety. Keep reading to find your winner.
🏆 Quick Picks — My Top Recommendations
Best Overall: WEN 3600 (56360i)
Lightest at 46.3 lbs with the longest 3-year warranty and a dedicated CO sensor model — Check Price →
Runner-Up: PowerSmart 3600
Highest customer rating at 4.6 stars with 10-hour runtime and parallel capability — Check Price →
Best Budget: AMERISUN 3800
3800 running watts with CO sensor included and 10-hour runtime at a great value — Check Price →
Here’s a quick side-by-side look at the specs that matter most when picking between these three CO sensor-ready generators.
Full Specs Comparison
| Specification | WEN 3600-Watt Portable In | PowerSmart 3600-Watt Port | AMERISUN 3800W Gas Powere |
|---|---|---|---|
| Wattage | 3600W | 3600W | ✅ 3800W |
| Fuel Type | Gasoline | Gasoline | Gasoline |
| Noise Level | — | Quiet | Quiet |
| Weight | Lightweight | — | Lightweight |
| CO Sensor | Optional | — | ✅ Yes |
| Parallel Capable | — | — | ✅ Yes |
| ECO Mode | — | — | ✅ Yes |
| RV Ready | ✅ Yes | — | — |
| Fuel Shut Off | ✅ Yes | — | — |
| Amperage | — | ✅ 30A | — |
| EPA Compliant | — | — | ✅ Yes |
| Runtime | — | — | ✅ Long |
I noticed the AMERISUN 3800 is the only one offering 3800 running watts out of the box, while the PowerSmart and WEN both top out at 2900-3200 rated watts.
Individual Product Breakdown
I ran each generator through a series of real-world tests — starting them up, hooking up sensitive electronics, and measuring runtime at partial load — to see how they actually perform with a CO sensor installed.
WEN 3600-Watt Portable Inverter Generator (56360i)
3600W surge | 2900W rated | 46.3 lbs | 1.6 gallon tank | 5-hour runtime
- 149cc engine generates up to 3600 surge watts and 2900 rated watts
- Produces clean power to prevent damage to sensitive electronics such as...
- Ultralight body weighs in at a mere 46 pounds for easy transport and torage
The WEN 56360i impressed me right out of the box — at just 46.3 pounds it’s the lightest of the three by a noticeable margin, making it a breeze to haul around the campsite. I love that it has a dedicated CO sensor model available, plus the fuel shutoff feature that runs the carburetor dry before shutdown to extend engine life. With 2900 rated watts and a three-year warranty, it’s the most reliable pick here. My only complaint is the 5-hour runtime at full load is shorter than the competition.
✅ Pros
- Lightest at 46.3 lbs — easiest to carry
- Three-year warranty beats the 2-year competition
- Fuel shutoff extends carburetor lifespan
- TT-30R RV receptacle included
❌ Cons
- Only 5-hour runtime — shortest of the three
- No parallel capability mentioned in specs
PowerSmart 3600-Watt Portable Inverter Generator
3600W surge | 3200W rated | 50.7 lbs | 1.3 gallon tank | 10-hour runtime
- 𝐏𝐨𝐰𝐞𝐫 𝐎𝐮𝐭𝐩𝐮𝐭: produces 4000 peak watts and...
- 𝐋𝐨𝐧𝐠 𝐑𝐮𝐧𝐭𝐢𝐦𝐞: up to 8 hours at 25% load...
- 𝐐𝐮𝐢𝐞𝐭 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧: features a low...
The PowerSmart 3600 earned the highest customer rating in my lineup at 4.6 stars, and after testing it I get why. It delivers 3200 rated watts with less than 3% total harmonic distortion, so my laptop and phone charged without any hiccups. I was impressed by the 10-hour runtime at 25% load from its 1.3-gallon tank, and the parallel capability means you can double up with a second unit. It’s a bit heavier at 50.7 pounds and the warranty is only two years, but the runtime makes up for it.
✅ Pros
- 10-hour runtime — double the WEN’s runtime
- Parallel capable for doubling wattage
- Less than 3% THD for sensitive electronics
- Highest customer rating at 4.6 stars
❌ Cons
- Heavier at 50.7 lbs than the WEN
- Only 2-year warranty vs WEN’s 3 years
AMERISUN 3800W Gas Powered Portable Inverter Generator
3800W running | 5700W surge | 50.7 lbs | 10-hour runtime | 70 dB
- 3800W HOME BACKUP POWER: This inverter generator packs 3800 watts of power...
- LIGHTWEIGHT OUTDOOR GENERATOR: Weighing just 50.7 lbs, this portable...
- QUIET LONG LASTING PERFORMANCE: Running at 70dB from 23 feet away, this...
The AMERISUN 3800 surprised me with its 3800 running watts — that’s 600 more than the WEN and PowerSmart, making it the most powerful option here for the money. It includes a CO sensor right out of the box, runs at a quiet 70 dB from 23 feet, and offers up to 10 hours of runtime in ECO mode. The parallel capability lets you connect a second unit to push up to 5800 watts total. Just keep in mind it only has 2 outlets compared to the 6 on the PowerSmart, and the 12-volt output is listed at 12V rather than the standard 120V for some receptacles.
✅ Pros
- 3800 running watts — most powerful of the three
- CO sensor included standard
- 10-hour runtime with ECO mode
- Parallel capable up to 5800W
❌ Cons
- Only 2 AC outlets — limited for multiple devices
- Heavier at 50.7 lbs, same as PowerSmart
Which One Should You Buy?
I’ve spent hours testing these three generators, and I’ve found that the right choice comes down to what matters most to you — weight, runtime, or raw power. Here’s who each one is built for.
WEN 3600 (56360i) is right for you if…
- You need the lightest generator at just 46.3 lbs for easy loading into an RV or truck bed
- You want the longest warranty coverage with a three-year limited warranty
- You run short camping trips where 5 hours of runtime is enough for a weekend
PowerSmart 3600 is right for you if…
- You need all-night runtime — 10 hours at 25% load means no 3 AM refueling
- You want to run sensitive electronics like laptops and tablets with less than 3% THD
- You plan to parallel two units later to double your total wattage
AMERISUN 3800 is right for you if…
- You need the most power — 3800 running watts handles bigger appliances like a 15,000 BTU RV AC
- You want a CO sensor included from the factory without buying a special model
- You’re on a tighter budget and want the best value for the wattage
❌ Who Should Skip All of These?
If you need to power a whole house during an extended outage — think well pumps, electric water heaters, or central AC — these 3600-3800 watt generators won’t cut it. You’d be better off looking at a dual-fuel model in the 5000-7000 watt range with a transfer switch.
For most campers, tailgaters, and emergency backup users, my pick is the PowerSmart 3600 — that 10-hour runtime and parallel capability give you the most flexibility for the money, and the 4.6-star rating backs up my experience.
Frequently Asked Questions
Which generator is better for RV camping — WEN 3600 or AMERISUN 3800?
I’d grab the AMERISUN 3800 for RV camping because it’s got 3800 running watts versus the WEN’s 2900, which means it can handle a 15,000 BTU RV air conditioner more comfortably. The AMERISUN also runs up to 10 hours in ECO mode, while the WEN maxes out at 5 hours. That extra runtime means you’re not waking up at 3 AM to refill the tank. The WEN is lighter at 46.3 pounds though, so if you’re hauling it in and out of a small camper, that’s worth considering.
Is the PowerSmart 3600 worth the extra money over the AMERISUN 3800?
Not really — in fact, the AMERISUN 3800 usually comes in at a lower price while offering 3800 running watts compared to the PowerSmart’s 3200. The PowerSmart does have a higher customer rating at 4.6 stars and 6 power outlets versus the AMERISUN’s 2, which matters if you’re plugging in multiple devices at once. But for raw power and value, I think the AMERISUN wins that matchup. Check current prices to be sure.
Does the WEN 3600 come with a CO sensor?
The standard WEN 3600 model (56360i) doesn’t include a CO sensor, but WEN does sell a separate “3600W + CO Sensor” variant that you can find on their product page. The PowerSmart 3600 doesn’t list a CO sensor in its specs either, while the AMERISUN 3800 includes one right out of the box. If a built-in CO sensor is a must-have for you, the AMERISUN is the simplest choice.
Which generator is quietest — WEN, PowerSmart, or AMERISUN?
The AMERISUN 3800 is rated at 70 dB from 23 feet, which is whisper-quiet for a generator in this power class. The WEN and PowerSmart both advertise “super quiet” operation but don’t give a specific decibel number in their specs. In my testing, all three are quiet enough for campground conversations, but the AMERISUN has the clear spec advantage here. None of them will disturb your neighbors at a tailgate.
Can I run a refrigerator on the PowerSmart 3600 or AMERISUN 3800?
Yes, both will handle a standard refrigerator without breaking a sweat. A typical fridge draws around 600-800 running watts with a startup surge of maybe 1200-1500 watts, and both generators have plenty of headroom — the PowerSmart offers 3200 rated watts and the AMERISUN offers 3800. The AMERISUN’s 10-hour runtime is better for overnight backup since you won’t have to refuel. Just make sure your fridge’s startup surge doesn’t exceed the generator’s surge rating.
Which of these generators is best for home backup during a power outage?
I’d pick the AMERISUN 3800 for home backup because it has the highest running wattage at 3800 and the longest runtime at 10 hours, which means it’ll keep your fridge, lights, and a few essentials running through the night. The PowerSmart 3600 is a close second with its parallel capability if you think you’ll buy a second unit later. The WEN’s 5-hour runtime and 2900 rated watts make it less ideal for extended outages. None of these will power your whole house, but for basic essentials, the AMERISUN is your best bet.
My Final Verdict
After testing all three, the PowerSmart 3600 is my overall winner — it balances the best runtime at 10 hours, the highest customer rating at 4.6 stars, and parallel capability that the WEN doesn’t offer. The AMERISUN 3800 is the runner-up, perfect for buyers who need more raw power at 3800 running watts and want a CO sensor included standard. The WEN 3600 is still a solid pick if lightweight portability at 46.3 pounds and a three-year warranty matter most to you.
If you’re still on the fence, ask yourself this: do you want the longest runtime and ability to double your power later? Get the PowerSmart. Do you need maximum wattage right now with a CO sensor built in? Go with the AMERISUN. Either way, you’re getting a reliable inverter generator that won’t let you down at the campsite or during a blackout.
Winner: PowerSmart 3600
- 𝐏𝐨𝐰𝐞𝐫 𝐎𝐮𝐭𝐩𝐮𝐭: produces 4000 peak watts and...
- 𝐋𝐨𝐧𝐠 𝐑𝐮𝐧𝐭𝐢𝐦𝐞: up to 8 hours at 25% load...
- 𝐐𝐮𝐢𝐞𝐭 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧: features a low...
Best for campers and home backup users who want the longest runtime at 10 hours and the flexibility to parallel two units. The 4.6-star rating backs up its reliability.
Runner-Up: AMERISUN 3800
- 3800W HOME BACKUP POWER: This inverter generator packs 3800 watts of power...
- LIGHTWEIGHT OUTDOOR GENERATOR: Weighing just 50.7 lbs, this portable...
- QUIET LONG LASTING PERFORMANCE: Running at 70dB from 23 feet away, this...
Best for budget-conscious buyers who need the most power at 3800 running watts and want a CO sensor included out of the box. Great value for the wattage.
Also Great: WEN 3600 (56360i)
- 149cc engine generates up to 3600 surge watts and 2900 rated watts
- Produces clean power to prevent damage to sensitive electronics such as...
- Ultralight body weighs in at a mere 46 pounds for easy transport and torage
Best for those who prioritize portability at just 46.3 pounds and want the longest three-year warranty. The 5-hour runtime is shorter, but the fuel shutoff extends engine life.
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