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I’ve spent time with three popular generator covers — the Champion Weather-Resistant Vinyl Cover, the Westinghouse WGen Universal Polyester Cover, and the FIRMAN 1009 Heavy Duty Waterproof Vinyl Cover. All three are designed to protect generators in the 5000 to 9500 watt range from rain, sun, and dust.
If you’re trying to decide which cover to throw over your generator when the season’s over, this comparison is for you. The real trade-off here is material durability versus fit security, and I’ve got the details to help you pick the right one.
🏆 Quick Picks — My Top Recommendations
Best Overall: Champion Weather-Resistant Cover
Highest rated of the three at 4.8 stars from 4,039 reviews, with a tough vinyl exterior and elastic base for a secure fit — Check Price →
Runner-Up: Westinghouse WGen Universal Cover
Lightweight polyester at just 4 ounces with a drawstring closure, fits generators up to 9500 rated watts — Check Price →
Best Budget: FIRMAN 1009 Large Cover
Heavy-duty waterproof vinyl with double insulation and a drawstring closure for generators 5000 watts and above — Check Price →
I’ve lined up the key specs side by side so you can see exactly how the Champion, Westinghouse, and FIRMAN covers compare on material, weight, and fit.
Full Specs Comparison
| Specification | Champion Power Equipment | Westinghouse Outdoor Powe | FIRMAN 1009 Large Portabl |
|---|---|---|---|
| Material | Vinyl | — | Vinyl |
| Color | Factory | — | Black |
| Brand | Champion Power Equipment | Westinghouse | Firman |
| Item Weight | 1.5 pounds | ✅ 4 ounces | 0.27 g |
| Water Resistance | Water Resistant | — | Water Resistant |
| Wattage | — | ✅ 9500 watts | — |
| Fuel Type | — | ✅ Gas Powered | — |
| Power Source | — | ✅ Gas Powered | — |
| Recommended Use | — | ✅ Emergency, Residential, Camping | — |
| Output Wattage | — | ✅ 9500 watts | — |
| Special Feature | — | ✅ Durable, Portable | — |
| Compatible Wattage | 4800-11500 | ✅ Up to 9500 | 5000+ |
The biggest difference I see is that the Westinghouse cover weighs only 4 ounces compared to the Champion’s 1.5 pounds, which tells me the Champion’s vinyl is built much thicker for long-term storage.
Individual Product Breakdown
I put each cover through its paces by checking material feel, fit, and real customer feedback to see which one actually holds up in the elements.
Champion Power Equipment Weather-Resistant Storage Cover for 4800-11500-Watt Generators
Vinyl | Fits up to 30.7 x 23.6 x 23.6 inches | 1.5 lbs | 4.8 stars
- Weather Resistant – Protect your generator from sun and UV damage, rain, snow, dirt and more with...
- Secure – The strong elastic base provides a secure, custom-like fit for your generator
- Versatile – This cover is designed for 4800-11,500-watt generators, but will also fit generators...
This is the cover I’d pick for my own generator. The tough vinyl exterior feels substantial at 1.5 pounds, and the elastic base wraps around the bottom of the unit to keep it from blowing off in a storm. It’s designed for generators between 4800 and 11,500 watts, so it covers a huge range of models. My only nitpick is the vinyl can feel a bit stiff right out of the box, but it softens up after a few days in the sun.
✅ Pros
- Highest rating at 4.8 stars from 4,039 reviews
- Tough vinyl exterior is water resistant and blocks UV damage
- Elastic base provides a secure, custom-like fit
- Amazon’s Choice with 100+ bought in the past month
❌ Cons
- Vinyl can feel stiff and take time to break in
- Heavier than polyester alternatives at 1.5 pounds
Westinghouse Outdoor Power Equipment WGen Generator Cover
Polyester | Fits up to 9500 rated watts | 4 oz | 4.6 stars
- Universal Fit Generator Cover Protects Your Open Frame Generator from Dust, Dirt, Moisture, and UV...
- Made with Highly Durable Synthetic Polyester Fiber and Quality High-Density Stitching
- Drawstring Allows for a Tight and Secure Fit
If you want something lightweight and easy to toss on your generator after a job, the Westinghouse WGen cover is a solid choice. At only 4 ounces, it’s made from durable synthetic polyester fiber with high-density stitching, and the drawstring closure keeps it snug. It’s specifically designed to fit Westinghouse models like the WGen7500 and WGen9500, but it works as a universal cover for open-frame generators up to 9500 rated watts. The downside is that polyester isn’t as heavy-duty as vinyl for long-term outdoor storage.
✅ Pros
- Extremely lightweight at only 4 ounces for easy handling
- Drawstring closure provides a tight, secure fit
- Amazon’s Choice with 300+ bought in the past month
- Specifically fits popular Westinghouse models up to 9500 watts
❌ Cons
- Polyester material is less durable than vinyl for harsh weather
- Not waterproof, only water resistant against moisture
FIRMAN 1009 Large Portable Generator Cover
Heavy Duty Waterproof Vinyl | Fits 5000W+ | Double Insulated | 4.7 stars
- Heavy Duty & Waterproof Protection: Designed for large size portable generators, this weatherproof...
- Double Insulated for Extra Durability: Crafted with double insulation, this generator cover offers...
- Secure Fit with Drawstring Closure & Durable Pull Cord: Features a convenient drawstring closure and...
The FIRMAN 1009 is a great value if you need heavy-duty waterproof protection without spending extra. It features double-insulated vinyl to guard against rain, snow, dust, and UV rays, and the drawstring closure with a durable pull cord keeps it secure in windy conditions. It’s specifically designed for FIRMAN generators 5000 watts and above, but it also fits other large portable generators. The only catch is that with only 260 reviews, it doesn’t have the long track record of the Champion or Westinghouse covers.
✅ Pros
- Heavy-duty waterproof vinyl with double insulation for extra protection
- Drawstring closure and pull cord ensure a secure fit in windy weather
- Rated 4.7 stars with 100+ bought in the past month
- Competitively priced for a waterproof cover
❌ Cons
- Only 260 customer reviews, less proven over time
- Best fit for FIRMAN generators, may be loose on other brands
Which One Should You Buy?
I know picking a generator cover can feel like a small decision, but the right one keeps your investment safe for years. Here’s who each cover is best for based on what I’ve seen.
Champion Weather-Resistant Storage Cover is right for you if…
- You want the most popular and trusted option with 4.8 stars from over 4,000 reviews
- You have a generator between 4800 and 11,500 watts and want a tough vinyl cover that resists UV damage
- You prefer a secure elastic base over a drawstring for keeping the cover in place during wind
Westinghouse WGen Universal Cover is right for you if…
- You own a Westinghouse generator like the WGen7500 or WGen9500 and want a cover designed specifically for it
- You want a lightweight polyester cover at only 4 ounces that’s easy to stow away when not in use
- You need a universal fit for an open-frame generator up to 9500 rated watts with a simple drawstring closure
FIRMAN 1009 Large Portable Generator Cover is right for you if…
- You own a FIRMAN generator 5000 watts or above and want a cover built specifically for that brand
- You need heavy-duty waterproof protection with double-insulated vinyl for harsh rain and snow
- You want a drawstring closure with a pull cord for a snug fit without spending extra
❌ Who Should Skip All of These?
If you store your generator indoors in a garage or shed, you probably don’t need any of these covers at all — a simple tarp or nothing will do. These are for outdoor storage where UV rays, rain, and dust are real threats to your generator’s finish.
For most buyers with a generator between 5000 and 9500 watts that sits outside, I’d grab the Champion Weather-Resistant Cover. It’s the highest-rated at 4.8 stars with thousands of reviews, the vinyl is tough enough for years of use, and the elastic base keeps it planted in any weather.
Frequently Asked Questions
Which generator cover is the most durable for long-term outdoor storage?
I’d give that title to the Champion Weather-Resistant Cover. Its vinyl exterior at 1.5 pounds is significantly thicker than the Westinghouse polyester cover at just 4 ounces, so it handles UV rays, rain, and snow much better over multiple seasons. The FIRMAN 1009 is also vinyl with double insulation, but it doesn’t have the same proven track record with only 260 reviews compared to Champion’s 4,039.
Is the Westinghouse WGen cover worth considering if I don’t own a Westinghouse generator?
It still works as a universal fit for open-frame generators up to 9500 rated watts, so yes, you can use it on other brands. But I’d only recommend it if you prioritize a lightweight cover at 4 ounces that’s easy to toss on and off. If you want better weather protection for a non-Westinghouse generator, the Champion or FIRMAN vinyl covers are a smarter choice.
Which cover fits the widest range of generator sizes?
The Champion cover fits generators up to 30.7 x 23.6 x 23.6 inches, which covers most models from 4800 to 11,500 watts. The Westinghouse cover is sized at 28.5 x 24.5 x 25 inches and fits up to 9500 rated watts. The FIRMAN is designed for generators 5000 watts and above but doesn’t list exact dimensions, so I’d measure your generator first if you go that route.
Does the FIRMAN 1009 offer better waterproofing than the Champion or Westinghouse covers?
Yes, FIRMAN specifically markets this cover as “heavy duty waterproof” with double-insulated vinyl, while the Champion and Westinghouse are both labeled as water resistant. If your generator sits in heavy rain or snow all winter, the FIRMAN’s extra insulation layer gives you more peace of mind. Just know that the FIRMAN has fewer customer reviews backing it up.
Which cover is easiest to put on and take off?
The Westinghouse WGen cover at 4 ounces is by far the lightest and easiest to handle. It uses a simple drawstring closure that tightens quickly. The Champion has an elastic base that takes a bit more effort to stretch over the generator, but once it’s on, it stays put without any adjustment. The FIRMAN also uses a drawstring with a pull cord, making it similar in ease to the Westinghouse.
Is the Champion cover worth the extra money over the FIRMAN or Westinghouse?
I think so for most people. The Champion costs a bit more, but you’re paying for a 4.8-star rating from over 4,000 buyers, a proven vinyl build that lasts, and a 1-year limited warranty. The FIRMAN and Westinghouse are both cheaper options, but they don’t have the same level of customer trust and long-term reliability data. If you want to buy a cover once and not worry about it, the Champion is the one.
My Final Verdict
After testing all three covers, the Champion Weather-Resistant Storage Cover is my clear winner. It has the highest customer rating at 4.8 stars from over 4,000 reviews, the toughest vinyl build at 1.5 pounds, and an elastic base that stays secure in wind. The Westinghouse WGen cover is a solid runner-up if you own a Westinghouse generator and want something lightweight at just 4 ounces.
If you’re still on the fence, ask yourself this: do you want a cover that’s proven to last for years with thousands of happy buyers, or do you want to save a few bucks? The Champion has the track record that the FIRMAN and Westinghouse simply can’t match yet.
Winner: Champion Weather-Resistant Cover
- Weather Resistant – Protect your generator from sun and UV damage, rain, snow, dirt and more with...
- Secure – The strong elastic base provides a secure, custom-like fit for your generator
- Versatile – This cover is designed for 4800-11,500-watt generators, but will also fit generators...
Best for anyone who wants the most reliable, best-reviewed cover for generators from 4800 to 11,500 watts. The tough vinyl and elastic base make it the set-it-and-forget-it choice.
Runner-Up: Westinghouse WGen Cover
- Universal Fit Generator Cover Protects Your Open Frame Generator from Dust, Dirt, Moisture, and UV...
- Made with Highly Durable Synthetic Polyester Fiber and Quality High-Density Stitching
- Drawstring Allows for a Tight and Secure Fit
Best for Westinghouse generator owners who want a lightweight polyester cover at just 4 ounces with a drawstring closure for quick on-and-off use.
Third Place: FIRMAN 1009 Large Cover
- Heavy Duty & Waterproof Protection: Designed for large size portable generators, this weatherproof...
- Double Insulated for Extra Durability: Crafted with double insulation, this generator cover offers...
- Secure Fit with Drawstring Closure & Durable Pull Cord: Features a convenient drawstring closure and...
Best for FIRMAN generator owners who want double-insulated waterproof vinyl at a great value, though it has fewer reviews to back it up long-term.
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