Yamaha EF2200iS vs Westinghouse iGen4500
The Yamaha EF2200iS is the lighter option; the gasoline Westinghouse iGen4500 offers substantially more continuous power and electric or remote starting. Choose from the loads you need to run, the weight you can move and the exact model available to buy.
Updated October 5, 2026. This is a specification-based comparison of the 120 V / 60 Hz models. Published ratings and the labeled examples below are not our measured test results.
EF2200iS vs iGen4500: key specifications
| Specification | Yamaha EF2200iS | Westinghouse iGen4500 |
|---|---|---|
| Continuous / running output | 1,800 W | 3,700 W |
| Maximum / peak output | 2,200 W | 4,500 W |
| AC supply | 120 V, 60 Hz | 120 V, 60 Hz |
| Fuel | Gasoline | Gasoline |
| Fuel tank | 1.24 U.S. gallons | 3.4 U.S. gallons |
| Published dry weight | 55.2 lb | 98 lb |
| Starting method | Recoil | Electric, remote or recoil |
| Published quarter-load runtime | 10.5 hours | 18 hours |
Sources: Yamaha’s U.S. EF2200iS specifications, Yamaha’s 120 V / 60 Hz model information and the Westinghouse iGen4500 specification sheet hosted by Norwall. Check the nameplate and manual of the unit being sold; regional versions and product revisions can differ.
Check the full model name before buying
The Yamaha model here is EF2200iS. For Westinghouse, this comparison concerns the original gasoline-only iGen4500. The iGen4500DF, models with a “c” suffix and the iGen5000 family are separate versions. Do not transfer their propane ratings, CO-sensor claims or weight into this comparison.
The old manufacturer iGen4500 product address currently redirects to an iGen5000 page. A search result or familiar product address therefore may not identify the machine you are buying. Ask for the complete model, AC voltage, running watts, fuel type and included accessories on the listing and invoice.
Which generator fits your appliance loads?
The Westinghouse has 1,900 W more published continuous output. That gives more room for simultaneous loads, but a larger rating does not establish compatibility with every refrigerator, air conditioner or medical device.
For an illustration, three hypothetical running loads of 600 W, 500 W and 300 W total 1,400 W. That is below both published running limits. Adding a 900 W load raises the total to 2,300 W: above the Yamaha’s continuous rating and below the iGen4500’s. These numbers are a planning example, not appliance measurements or a startup test.
Check motor-starting demand separately and include the other loads that will already be operating. A peak figure is not the continuous budget. Use our appliance priority list and load worksheet to record requirements before selecting equipment.
An RV-style socket also does not increase a generator’s output. Confirm the outlet, cable, voltage and appliance instructions. A 120 V generator is not a substitute for equipment that requires 240 V. Have a qualified electrician assess any connection to home wiring.
Does 18 hours mean better fuel efficiency?
The published quarter-load runtimes use different electrical loads: 25% × 1,800 W = 450 W for Yamaha and 25% × 3,700 W = 925 W for Westinghouse. Their fuel tanks also differ. Comparing 10.5 hours with 18 hours alone does not establish an efficiency winner at the same load.
These ratings are useful planning references, not a guarantee of uninterrupted overnight operation. To compare fuel use properly, you would need consumption at the same delivered load and conditions. We do not extrapolate a half-load or three-quarter-load runtime from the quarter-load figure.
Noise, transport and starting convenience
Yamaha publishes 57–65 dBA from quarter load to rated load, with its global specification identifying a 7 m measurement distance. Westinghouse’s legacy sheet advertises a minimum of 52 dBA without an equivalent load-and-distance description there. Those figures do not provide a controlled comparison, so we do not rank either as quieter under identical conditions.
The published dry-weight difference is 42.8 lb. Fuel and accessories add weight beyond the dry figure. Consider the lift into your vehicle and the route from storage to the operating location, rather than only whether a unit has carrying handles or wheels.
The iGen4500’s electric and remote start can be convenient; its starting battery adds an item to check and maintain. Yamaha’s recoil start requires a manual pull. Neither starting arrangement proves a longer service life. Follow the exact manual’s service and storage schedule rather than an assumed brand-based reliability score.
Safe operation comes before runtime
CPSC advises operating portable generators outdoors, at least 20 feet from homes, with exhaust directed away. Never run one inside a home or garage, even with doors open. Use working CO alarms on every level and outside sleeping areas. A generator’s safety features do not replace correct placement.
Follow the equipment instructions for cords, weather protection and connections. The CPSC generator safety guide warns against backfeeding through a household outlet and advises shutting down and cooling the engine before refueling. Use a qualified electrician for a suitable home connection. If the goal is keeping food cold, our refrigerator outage checklist separates equipment runtime from food-safety decisions.
Which should you shortlist?
Shortlist the Yamaha when your verified loads fit its output and reducing carrying weight matters. Shortlist the legacy iGen4500 when you need more continuous output and value electric or remote start, provided the exact gasoline model and its condition meet your requirements.
Before paying, compare the complete cost: exact unit, suitable cords, required accessories, delivery and warranty coverage for that seller and model. Confirm local service availability and the return policy. A newer product substituted into an old listing needs a fresh specification check.
If you are deciding between a fuel generator and a battery for limited essential loads, see our Explorer 1000 v2 vs DELTA 2 comparison for the separate power, energy and charging checks. For larger gasoline units, our Champion 201505 vs WGen7500 comparison covers another output class.
42 comments
If you have an RV or need actual backup for a house, the Westinghouse dual fuel + remote start + CO sensor combo is super practical. I switched to dual fuel after one winter outage and didn’t regret it.
Note: CO sensor is a welcome safety feature — don’t run these in enclosed spaces though, always ventilate.
For small outings the Yamaha is nicer, but for heavy-duty backup the Westinghouse wins hands down.
Agreed — CO sensor saved someone I know from trouble once.
Great safety reminder — CO sensors are important, but generators should always be operated outdoors and away from windows. Good tip on dual fuel for longer outages.
Remote start + propane = lazy survivalist heaven 😂
Just don’t store propane near the generator folks. Safety first.
Noise matters to me more than a tiny bit of extra power. If it’s noisy you can’t use it at a campsite without annoying everyone. Yamaha wins for noise in my book.
Also, the build looks nicer — purely aesthetic but still. 😅
If I’m running an RV AC, I can’t complain about noise much — comfort > quiet in that case.
Aesthetic matters. If it’s ugly and loud, it ruins the vibe 😆
Agreed. I prefer the quieter unit for weekend trips.
Long story: used a Yamaha 2200 at a cabin weekend once. Quiet, started every time, and my chainsaw (small one) ran for short bursts fine.
Pros: lightweight, whisper-ish at low load
Cons: won’t run heavy ACs or big pumps
Would pick Westinghouse for long term power needs; Yamaha for portability.
🙂👍
Chainsaw on a small inverter? Nice. I was hesitant about using tools on inverters but some small ones handle it fine.
Yep, tools with big startup draw might be okay for short bursts, but check surge capacity.
If I have to carry ‘5000 peak’ up a hill, you’re getting a new best friend (me) and a hernia. 😂
Kidding aside: portability vs raw power is the tradeoff. For my weekend hikes the Yamaha is a no-brainer. For weekend home outages or RV trips, Westinghouse all the way.
Also, do people actually run microwaves off the Yamaha? Seems optimistic.
Small travel microwaves sometimes work, but it’s risky without confirming running watts.
Also remember compressor start watts for fridges — microwaves are less about start but more about continuous draw.
Tried once, tripped breaker. Learned my lesson 😂
If your microwave draws 1200W running and the generator gives 1800W continuous, you’ll be fine. But confirm both numbers.
Price and serviceability matter. Yamaha has a good rep for reliability and dealers, but Westinghouse seems to pack more features for the $.
Does anyone know warranty differences?
I had a small Yamaha repaired under warranty smoothly once — dealer support helped a lot.
Warranties vary by model and seller — Yamaha typically offers solid warranty coverage and a dealer network, while Westinghouse often includes decent warranties too. Always check the exact terms and any extended warranty options.
I always laugh at ‘5000 peak’ specs. Peak is basically the “I can sprint for 10 seconds” stat. Running watts matter more. 😆
That said, if you’ve got an actual RV or lots of tools, the Westinghouse seems like the only sane pick here.
True! Always check running watts. Peak is basically marketing flex.
Spot on — don’t buy based on peak watts alone. Look for continuous/running watts for real appliance compatibility.
The remote electric start on the Westinghouse is a game-changer. I hate choke-pulling in the rain.
– Dual fuel? Nice fallback if you run out of gas.
– 5000 peak is handy for surge-heavy things.
– But expect more weight and noise vs the Yamaha.
I think it depends on whether you want convenience/power vs quiet/portability.
Exactly — remote start and dual fuel are big conveniences. Just remember that peak watts are not the same as continuous watts; check the continuous/running watt numbers for items like ACs or microwaves.
Remote start saved my bacon during a storm. No joke.
Quick question for anyone: is the Westinghouse inverter “true” inverter tech (clean sine wave) or just a conventional inverter? I need clean power for some audio gear.
Also wondering if anybody uses propane with it frequently.
I’ve used propane on a Westinghouse model — worked well, quieter smell too.
Most modern Westinghouse inverter models are designed to produce low-THD sine wave output suitable for electronics, but exact specs vary by model. Propane is a great option for longer storage and can be used regularly, though cold-weather starting can be trickier — check the manual for recommended usage.
If you’re picky about audio, check the THD number (usually <3% is good).
I’m curious about runtime. The article mentioned runtimes but didn’t break down real-world numbers.
Like: how long will the Yamaha run a mini-fridge vs how long the Westinghouse will run an RV fridge on propane? Anyone tested both?
Thanks for clarifying, admin. Good to know it depends on load.
Propane helped my runtime a LOT on my old generator — but starts slower in cold weather.
Runtime varies a lot with load, fuel type (for the Westinghouse), and tank size. Generally: smaller inverters like the Yamaha are very fuel-efficient at light loads; bigger Westinghouse models have larger tanks and can run longer at moderate loads, and propane can give longer shelf stability. Best to check the spec sheets for estimated runtimes at 25%/50% load.
I ran a Yamaha on a cooler/fridge for a weekend and it was about 8-10 hours on a small tank. Not super precise but gives a ballpark.
I’ve owned a small Yamaha inverter before and honestly the EF2200iS being 2200W sounds perfect for weekend camping and powering a fridge + a few gadgets. Lighter, quieter, and more portable in my experience.
That Westinghouse looks like a beast though — 5000 peak is great if you need to run an RV AC or big tools, but I bet it’s heavier and less convenient to move around. 🤷♀️
Totally. I had to lug a 50-lb generator once and swore off ‘bigger is always better’ 😂
Yup. For a rooftop tent trip I’d pick Yamaha. For longer stays with AC, Westinghouse wins hands down.