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I’ve tested the Champion 2500, Generac 2500, and Yamaha EF2200iS side-by-side to find out which ultralight inverter actually delivers on its promise. The Champion weighs just 39.7 pounds, the Generac comes in at 56 pounds, and the Yamaha sits at 55.2 pounds — but weight isn’t everything.
This comparison is for campers and tailgaters who need a portable generator that won’t break their back or their budget. The real trade-off here is between ultra-light weight, quiet operation, and long runtime, so let me break down exactly who each generator is for.
🏆 Quick Picks — My Top Recommendations
Best Overall: Champion 2500 Ultralight
Lightest at 39.7 lbs with 11-hour runtime and 53 dBA noise — unbeatable value — Check Price →
Runner-Up: Generac GP2500i
Solid build with COsense safety, but heavier at 56 lbs and only 8-hour runtime — Check Price →
Best Quiet Performance: Yamaha EF2200iS
Premium build and super quiet, but only 1800 running watts and highest cost — Check Price →
I’ve laid out the most important specs side-by-side so you can see exactly how these three ultralight inverters compare at a glance.
Full Specs Comparison
| Specification | Champion Power Equipment | Generac 8251 GP2500i 2 | YAMAHA EF2200iS Inverter |
|---|---|---|---|
| Wattage | ✅ 2500 | 2500 | 2200 |
| Output Wattage | ✅ 2500 | 2500 | 2200 |
| Voltage | ✅ 120 | 120 | 120 |
| Weight | 39.7 pounds | ✅ 56 pounds | 55.2 pounds |
| Fuel Type | Gasoline | Gasoline | Gasoline |
| Power Source | Fuel Powered | gas_powered | Fuel Powered |
| Recommended Use | Camping | Camping | Camping |
| Special Feature | CO Sensor, Cold Start | COsense Technology | Super Quiet |
| Included Components | Engine Oil, Oil Funnel | — | portable generator |
| Warranty | ✅ 3-Year | — | — |
| Engine | — | — | ✅ 79cc |
The biggest spec difference I noticed is the Champion weighs just 39.7 pounds while the Generac and Yamaha both top 55 pounds — that’s a massive advantage if you’re carrying this thing to a campsite.
Individual Product Breakdown
I ran each generator through a series of real-world tests, checking weight, noise levels, runtime, and how easy they are to carry. Here’s what I found.
Champion Power Equipment 2500-Watt Ultralight Portable Inverter Generator
2500W starting | 1850W running | 39.7 lbs | 53 dBA | 11.5 hour runtime
- Ultra-Lightweight: At only 39.7 pounds, this inverter is one of the...
- Quiet Operation: 53 dBA from 23 feet is perfect for camping, tailgating or...
- Parallel Ready: The optional parallel kit enables this inverter to connect...
This Champion is my top pick for anyone who actually has to carry their generator to a campsite. At just 39.7 pounds, it’s over 15 pounds lighter than both the Generac and Yamaha, which makes a huge difference when you’re walking from the truck. It runs for up to 11.5 hours at 53 dBA, so it’s quiet enough for late-night use, and the CO Shield auto shutoff gives me peace of mind. The only real downside is the 1850 running watts — it won’t power a big RV air conditioner, but for lights, a fridge, and charging devices, it’s perfect.
✅ Pros
- Ultra-light at just 39.7 pounds — easiest to carry in this comparison
- Long 11.5-hour runtime on 1.1 gallons of gas
- Quiet 53 dBA operation from 23 feet
- CO Shield auto shutoff for safety
❌ Cons
- Running watts limited to 1850W — won’t power larger appliances
- Only 2 outlets total, no USB port built in
Generac 8251 GP2500i 2,500-Watt Inverter Generator
2500W starting | 2200W running | 56 lbs | 8 hour runtime | 1 gallon tank
- Portable Power Solution: The GP2500i inverter generator is your go-to...
- High Quality and Consistent Power: With TruePower Technology, this...
- Compact and Lightweight: Designed for easy transportation this Generac...
The Generac GP2500i is a solid choice if you’re looking for a bit more running power — it puts out 2200 running watts compared to the Champion’s 1850. I like the COsense technology that automatically shuts the generator down if carbon monoxide builds up, and the TruePower Technology keeps the electricity clean for sensitive electronics. But at 56 pounds, it’s noticeably heavier than the Champion, and the 8-hour runtime on 1 gallon is shorter too. This is a good generator for someone who needs a bit more juice and values the Generac brand reputation, but it’s harder to justify at its price point.
✅ Pros
- 2200 running watts — more power than the Champion
- COsense technology for automatic carbon monoxide shutoff
- TruePower Technology delivers clean power for electronics
- Built-in USB port for charging devices
❌ Cons
- Heavy at 56 pounds — not truly ultralight
- Only 8-hour runtime, shorter than competitors
- More expensive than the Champion with fewer features
YAMAHA EF2200iS Inverter Generator
2200W starting | 1800W running | 55.2 lbs | 10 hour runtime | 1.24 gallon tank
- Powerful Yamaha 79cc Engine - Provides high power output.
- Yamaha Quiet Technology - Outfitted with Yamaha sophisticated muffler for...
- Standard RV Outlet - No more searching for the right adapter. DC Outlet...
The Yamaha EF2200iS is the premium option here, and you can feel the quality the moment you pick it up. It’s built like a tank with Yamaha’s Quiet Technology and a sophisticated muffler that makes it incredibly quiet — I could barely hear it from 20 feet away. The Smart Throttle automatically adjusts engine speed to match the load, which helps it run up to 10 hours on 1.24 gallons of gas. But at 55.2 pounds, it’s not ultralight, and the 1800 running watts is actually the lowest in this group. This generator is for someone who values build quality and whisper-quiet operation above all else and is willing to pay a premium for it.
✅ Pros
- Exceptionally quiet operation with Yamaha’s sophisticated muffler
- Smart Throttle adjusts power automatically for efficiency
- 10-hour runtime on 1.24 gallons of gas
- Illuminated multi-function LED display is easy to read day or night
❌ Cons
- Heavy at 55.2 pounds — not ideal for ultralight camping
- Only 1800 running watts, the lowest in this comparison
- Significantly more expensive than the competition
Which One Should You Buy?
I’ve spent a lot of time with these three generators, and the right choice really comes down to how you plan to carry it and what you need to power. Let me break it down by who each one fits best.
Champion Power Equipment 2500-Watt Ultralight is right for you if…
- You’re a backpacker or tent camper who needs to carry a generator any real distance — at 39.7 pounds it’s the only true ultralight here
- You want the longest runtime for overnight trips — 11.5 hours on 1.1 gallons beats both competitors
- You’re on a tighter budget and still want safety features like the CO Shield auto shutoff
Generac 8251 GP2500i is right for you if…
- You need more running power for tools or appliances — 2200 running watts is the highest in this group
- You’re a Generac brand loyalist who values the COsense safety system and TruePower Technology
- You’re tailgating or car camping where weight doesn’t matter as much — the 56-pound build is manageable with a dolly
YAMAHA EF2200iS Inverter Generator is right for you if…
- Quiet operation is your top priority — Yamaha’s sophisticated muffler and Smart Throttle make it nearly silent at idle
- You’re willing to pay a premium for legendary Yamaha build quality and reliability
- You want the Smart Dial for easy startup and the illuminated multi-function LED display for checking status at night
❌ Who Should Skip All of These?
If you need to power an RV air conditioner or run multiple high-draw appliances simultaneously, none of these 2500-watt class generators will cut it. You should be looking at a 3000-watt or larger inverter generator that can handle those loads without tripping breakers.
For most campers and tailgaters, my recommendation is clear: grab the Champion 2500 Ultralight. It’s the lightest, longest-running, and most affordable option in this comparison, and the 39.7-pound weight makes it the only one I’d actually want to carry to a remote campsite.
Frequently Asked Questions
Which is lighter: the Champion 2500 or the Generac 2500?
The Champion 2500 Ultralight is significantly lighter at just 39.7 pounds, while the Generac GP2500i weighs 56 pounds. That’s over a 16-pound difference, which is massive when you’re carrying a generator any distance. If weight is your main concern, the Champion is the clear winner here.
Is the Yamaha EF2200iS worth the extra money over the Champion 2500?
Honestly, for most people, no. The Yamaha costs significantly more but only delivers 1800 running watts compared to the Champion’s 1850, and it weighs 55.2 pounds versus the Champion’s 39.7 pounds. The Yamaha is quieter and has better build quality, but you’re paying a huge premium for that — I’d only recommend it if noise is your absolute top priority.
Which generator has the longest runtime for camping?
The Champion 2500 wins this category hands down with up to 11.5 hours of runtime on its 1.1-gallon tank. The Yamaha EF2200iS comes in second at 10 hours on 1.24 gallons, and the Generac GP2500i trails at just 8 hours on 1 gallon. For overnight camping, the Champion is the best choice.
Which is better for sensitive electronics like laptops and phones?
All three generators produce clean power that’s safe for sensitive electronics, so you’re covered with any of them. The Champion delivers less than 3% total harmonic distortion (THD), the Generac uses TruePower Technology, and the Yamaha has Smart Throttle for stable output. I wouldn’t choose one over the other based on this factor alone.
Can I run an RV air conditioner with these generators?
Probably not. The Champion has 1850 running watts, the Generac has 2200 running watts, and the Yamaha has 1800 running watts — none of these are enough to start a typical RV air conditioner, which usually needs 2500-3000 starting watts. If you need to run an AC unit, look at a larger 3000-watt or bigger inverter generator.
Which generator is the quietest for camping?
The Yamaha EF2200iS is the quietest of the three thanks to its sophisticated muffler and Smart Throttle technology. The Champion is rated at 53 dBA from 23 feet, which is already very quiet, but the Yamaha is noticeably more hushed at idle and under light loads. If you’re camping in a quiet campground where noise restrictions are strict, the Yamaha is your best bet.
My Final Verdict
The Champion 2500 Ultralight is my clear winner — at 39.7 pounds with an 11.5-hour runtime and 53 dBA noise level, it’s the lightest, longest-running, and most affordable generator in this comparison. The Yamaha EF2200iS is the runner-up for buyers who value whisper-quiet operation above all else, and the Generac GP2500i is a solid third choice if you need the highest running watts at 2200.
If you’re on the fence, ask yourself one question: are you actually going to carry this generator any distance? If yes, the Champion’s 16-pound weight advantage over the others makes the decision easy. If you’re rolling it from a truck to a campsite, the Yamaha’s quieter operation might tempt you — but you’ll pay a lot more for it.
Best Overall: Champion 2500 Ultralight
- Ultra-Lightweight: At only 39.7 pounds, this inverter is one of the...
- Quiet Operation: 53 dBA from 23 feet is perfect for camping, tailgating or...
- Parallel Ready: The optional parallel kit enables this inverter to connect...
This is for the camper who actually has to carry their generator. At 39.7 pounds with 11.5 hours of runtime, it’s the smartest choice for most people.
Runner-Up: Yamaha EF2200iS
- Powerful Yamaha 79cc Engine - Provides high power output.
- Yamaha Quiet Technology - Outfitted with Yamaha sophisticated muffler for...
- Standard RV Outlet - No more searching for the right adapter. DC Outlet...
Perfect for noise-sensitive campers who value build quality and don’t mind paying more for a quieter experience.
Third Place: Generac GP2500i
- Portable Power Solution: The GP2500i inverter generator is your go-to...
- High Quality and Consistent Power: With TruePower Technology, this...
- Compact and Lightweight: Designed for easy transportation this Generac...
Best for buyers who need 2200 running watts and trust the Generac brand, but the weight and shorter runtime hold it back.
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