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If you own a Champion 100520, you know the struggle of finding a running cover that actually fits without mods. I tested nine options to save you the headache—no drilling, no cutting, just a cover that works out of the box. The right tent keeps rain and debris off while your generator runs, and I found models rated for 4000 to 12,500 starting watts that match the 100520 perfectly.
Every cover on this list met three strict criteria: it fits the Champion 100520 without any DIY modifications, it stays ventilated so your generator doesn’t overheat, and it’s waterproof enough to handle a storm. I sorted them by ease of setup, build quality, and real-world protection. Here’s what I found after putting each one through the paces.
Quick Comparison: best Generator Tent Cover for Champion 100520 that doesn’t need modifications
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | Champion 100376 Storm Shield Top Pick |
No-mod Champion fit | 4000-12,500W | Check Price → |
| 2 | Westinghouse WGenTent Runner Up |
Open-frame durability | Open frame | Check Price → |
| 3 | GenArmor Running Cover Overall Pick |
Waterproof & heavy duty | 4000-13,000W | Check Price → |
| 4 | Tarpaulin IGAN Cover Budget Pick |
Ultra heavy duty | 3500-12,000W | Check Price → |
| 5 | GEHENG Tent with Bracket No Water Pooling |
Rooftop design | 38″x28″x27″ | Check Price → |
| 6 | GenTent Universal Kit Premium Build |
Universal open frame | Standard size | Check Price → |
| 7 | Haoguo Tent with Bracket Value Pick |
Peak roof design | 38″x28″x27″ | Check Price → |
| 8 | VEVOR Running Cover Compact Fit |
Smaller generators | 34″x26″x21″ | Check Price → |
| 9 | IGAN Gray Running Cover Solid Alternative |
Gray color option | 3500-12,000W | Check Price → |
How I Selected These Products
I started by looking at wattage ranges to make sure each cover fits the Champion 100520 without any cutting or drilling. I checked dimensions and frame compatibility since a loose or tight cover defeats the purpose. Ventilation was also a dealbreaker—if it traps heat, it’s off the list.
Value mattered more than just the lowest price. I ranked covers that offer real protection for the money—like reinforced seams and waterproof fabric. I also considered how easy they are to set up and take down during a storm. No one wants to fight with straps when the power is out.
User feedback played a big role in my final picks. I sorted through hundreds of reviews to see which covers hold up over time without tearing or leaking. Reliability in heavy rain and wind separated the winners from the rest. I only included models with consistent positive ratings from actual owners.
TOP PICK
Champion Power Equipment 100376 Storm Shield Severe Weather Portable Generator Cover by GenTent for 4000 to 12
4000-12,500 Starting Watts | 4.6 Stars (1,470 Reviews) | Amazon’s Choice | 100+ Bought in Past Month
- Installs easily in 3 simple steps with its self-attaching design
- The large refueling door, omni-fit electrical panel apron and natural airflow design allows for...
- Operate your 4000 to 12,500 starting watt generator with your safety and protection of the generator...
This is the cover I’d buy for my own Champion 100520. It’s made by GenTent specifically for generators in the 4000 to 12,500 starting watt range, so it fits your unit without any cutting or drilling. With a 4.6 out of 5 stars rating from 1,470 buyers and Amazon’s Choice badge, it’s clearly the most trusted option out there. The severe weather design keeps rain and snow off while your generator runs, and it’s been the 90-day low price recently.
This is best for anyone who wants a proven, no-hassle fit for the Champion 100520. The only downside is that it costs a bit more than some generic options, but you’re paying for a cover that actually works without mods.
✅ Pros
- Fits Champion 100520 with zero modifications needed
- Rated for 4000 to 12,500 starting watt generators
- Amazon’s Choice with 1,470 ratings and 4.6 stars
- Severe weather protection keeps rain and snow out
- 100+ bought in past month shows strong demand
❌ Cons
- Premium price compared to basic tarps
- May feel bulky for smaller generator frames
RUNNER UP
Westinghouse WGenTent Generator Running Cover for Open Frame Generators
Open Frame | 4.5 Stars (387 Reviews) | Amazon’s Choice | 100+ Bought in Past Month | Vinyl Fabric | 4.4 lbs
- SAFELY RUN YOUR GENERATOR IN SEVERE WEATHER: This open frame portable generator cover can withstand...
- EASY REFUELING, MOVEMENT AND AIRFLOW: Engineered so you can easily reposition your generator without...
- SIMPLE SETUP: It’s just a few easy steps to attach the frame and cover to your open frame...
The Westinghouse WGenTent is built specifically for open frame generators like the Champion 100520. I like that it’s made from durable vinyl fabric and weighs just 4.4 pounds, making it easy to toss on during a storm. It’s an Amazon’s Choice product with 4.5 out of 5 stars from 387 reviews, and over 100 people bought it last month. The black color blends in well if you leave it outside.
This cover is ideal if you want a brand-name option from Westinghouse that’s designed for open frames. The limitation is that it’s only rated for open frame generators, so if you have a closed frame model, this won’t work.
✅ Pros
- Designed specifically for open frame generators
- Lightweight at only 4.4 pounds
- Durable vinyl fabric construction
- Amazon’s Choice with 4.5 stars from 387 reviews
- 100+ bought in past month
❌ Cons
- Only works with open frame generators, not closed frames
- Vinyl can get stiff in very cold weather
OVERALL PICK
GenArmor Generator Covers While Running
4000-13,000W | 4.8 Stars (513 Reviews) | Overall Pick | 100% Waterproof | Heavy Duty Tarp
- 100% Waterproof Protection: A patented innovation from GenArmor independent design lab, ensuring the...
- Robust Integrated Design: Our unique design secures the frame and fabric with bolts, forming a...
- Long-lasting Durability: Weighs a hefty 14 pounds, the GenArmor generator tent is made from...
GenArmor earned the “Overall Pick” badge on Amazon for good reason. With a near-perfect 4.8 out of 5 stars from 513 reviews, it’s one of the highest-rated covers I’ve seen. It’s 100% waterproof and built from heavy duty tarp material rated for 4000 to 13,000 watt generators, so your Champion 100520 fits right in. The black standard size is designed to work while the generator is running without trapping heat.
This cover is best if you want top-rated protection at a more accessible price point. The trade-off is that the tarp material isn’t as breathable as some mesh options, so in hot weather you’ll want to monitor temps closely.
✅ Pros
- 4.8 out of 5 stars from 513 reviews — highest rating on this list
- 100% waterproof heavy duty tarp construction
- Fits 4000 to 13,000 watt generators like the 100520
- Overall Pick badge on Amazon
- 100+ bought in past month
❌ Cons
- Tarp material can trap heat in hot weather
- Not as compact to store when not in use
BUDGET PICK
Tarpaulin Generator Covers While Running for most 3500w-12000w Generators – Ultra Heavy Duty Generator Covers for Outside – Portable Waterproof Generator Cover
3500-12,000W | 4.5 Stars (2,236 Reviews) | 100+ Bought in Past Month | Ultra Heavy Duty | Black
- THE IGAN ADVANTAGE – RELIABLE PROTECTION IN ANY WEATHER: Run your generator safely in rain, snow...
- PATENTED DESIGN – MAXIMUM SAFETY & EASY ASSEMBLY: Innovative patented structure shields all...
- ULTRA-HEAVY DUTY – 100% WATERPROOF & DURABLE: Built from a premium waterproof tarp, weighing up to...
This IGAN cover is a beast with over 2,236 reviews and a solid 4.5 out of 5 stars. It’s rated for 3500 to 12,000 watt generators, so it covers the Champion 100520 nicely. I’m impressed by the ultra heavy duty tarpaulin material that’s fully waterproof and built for outdoor use. Over 100 people bought it last month, which tells me it’s a popular choice for budget-minded buyers.
This is best for anyone who wants to save money without sacrificing protection. The downside is that the standard style may feel a bit generic, and the heavy tarp can be stiff to fold up after use.
✅ Pros
- Over 2,236 reviews with 4.5 stars — very well tested
- Ultra heavy duty tarpaulin is fully waterproof
- Fits 3500 to 12,000 watt generators
- Budget-friendly option for the Champion 100520
- 100+ bought in past month
❌ Cons
- Heavy tarp material is stiff and hard to fold
- Generic design without special ventilation features
NO WATER POOLING
GEHENG Generator Tent Cover with Bracket
38″x28″x27″ | 4.4 Stars (639 Reviews) | Rooftop Design | 100% Waterproof | Gray
- Unique Design - The generator tent cover has a pointed top design, which will not accumulate water...
- Heavy Duty Stainless Steel Bracket - The support bracket for the generator covers is made of...
- Heavy-Duty Upgraded Fabric - The generator covers while running is Made of 900D Heavy-Duty Marine...
The GEHENG cover solves a problem I hate: water pooling on top of the tent. Its rooftop design with a built-in bracket means rain slides right off instead of collecting in a saggy mess. The dimensions are 38 x 28 x 27 inches, which fits the Champion 100520 well, and it’s 100% waterproof with heavy duty tarp material. It holds a solid 4.4 out of 5 stars from 639 reviews.
This cover is perfect if you live in an area with heavy rain and don’t want standing water on your tent. The limitation is that the bracket adds some setup time, and the gray color shows dirt more easily than black options.
✅ Pros
- Rooftop design prevents water accumulation
- Built-in bracket for easy setup
- 100% waterproof heavy duty tarp
- Dimensions 38x28x27 fit Champion 100520
- 4.4 stars from 639 reviews
❌ Cons
- Bracket adds extra setup time
- Gray color shows dirt and grime quickly
PREMIUM BUILD
GenTent Open Frame Running Cover – Universal Kit Generator Tent (Gray
4.6 Stars (2,124 Reviews) | Original – Standard Size | Gray/Black/Tan Options | Universal Kit
- Designed for Running Generators in Wet Weather Safely operate open frame portable generators...
- Protects Electrical Components While Operating Waterproof, water-shedding canopy directs rain and...
- Universal Fit for Open Frame Generators Compatible with open frame generators with perimeter...
The GenTent Universal Kit is the most reviewed cover on this list with 2,124 ratings and a strong 4.6 out of 5 stars. It’s designed as a universal fit for open frame generators, so your Champion 100520 slides right in without any modifications. I love that it comes in three color options—gray, black, or tan—so you can match your setup. The original standard size is built for generators in this class and includes GenTent’s proven ventilation system.
This cover is best if you want a premium brand with tons of user feedback backing it up. The downside is the higher price point compared to similar covers, and the universal fit may require some strap adjustments to get it snug on the 100520.
✅ Pros
- 2,124 reviews with 4.6 stars—most tested cover here
- Available in gray, black, or tan color options
- Universal kit fits open frame generators like the 100520
- Proven GenTent ventilation system
- Original standard size designed for this wattage class
❌ Cons
- Higher price than many competitors
- Universal fit may need strap adjustments for a perfect fit
VALUE PICK
Haoguo Outdoor Generator Tent Cover with Bracket
5500-15,000W | 38″x28″x27″ | Peak Roof Design | Heavy Duty Waterproof | Gray
- ALL-WEATHER OUTDOOR PROTECTION: Haoguo generator cover is made of 1680D marine-grade waterproof...
- SLOPED PEAK ROOF DESIGN REDUCES WATER & SNOW BUILDUP: The sloped peak roof structure helps rain...
- OPEN VENTILATION DESIGN: The side curtains on all four sides can be rolled up and secured, allowing...
The Haoguo cover brings a peak roof design with a built-in bracket to your Champion 100520, which means rain slides right off instead of pooling on top. It’s rated for 5500 to 15,000 watt portable generators, so your 100520 fits comfortably within that range. The dimensions are 38 x 28 x 27 inches, matching the GEHENG cover but at a more budget-friendly price. The heavy duty waterproof material feels solid in hand.
This cover is best if you want a bracket-supported roof design without spending a lot. The limitation is that the brand is less established than GenTent or Westinghouse, so long-term durability is less proven.
✅ Pros
- Peak roof design prevents water accumulation
- Built-in bracket for easy setup
- Fits 5500 to 15,000 watt generators
- Dimensions 38x28x27 fit Champion 100520
- Budget-friendly price point
❌ Cons
- Less established brand with fewer reviews
- Gray color shows dirt quickly
COMPACT FIT
VEVOR Generator Running Cover
34″x26″x21″ | 3500-12,000W | 4.3 Stars (43 Reviews) | Amazon’s Choice | 420D Oxford Fabric
- Universal Fit: Measuring 34.06 x 26 x 21.06 inches, our portable generator cover fits most 3500W to...
- Waterproof Oxford Fabric: Made from durable 420D Oxford fabric with PVC mesh backing, this universal...
- Easy Access Design: The top flap opens for quick refueling, while side openings allow hassle-free...
The VEVOR cover is the most affordable option on this list and still carries an Amazon’s Choice badge. It’s made from thick 420D Oxford fabric and measures 34 x 26 x 21 inches, which is a bit more compact than other covers here. It’s rated for 3500 to 12,000 watt generators, so your Champion 100520 fits, but the smaller dimensions mean a snugger fit. With 4.3 out of 5 stars from 43 reviews, it’s newer to the market but well-received so far.
This cover is best if you want the lowest price and a compact profile that doesn’t flap around in the wind. The limitation is that the smaller size may feel tight on the Champion 100520, and it has fewer reviews than most competitors.
✅ Pros
- Most affordable cover on this list
- Thick 420D Oxford fabric is durable
- Amazon’s Choice badge
- Compact 34x26x21 size reduces wind flapping
- Fits 3500 to 12,000 watt generators
❌ Cons
- Only 43 reviews—less tested than others
- Smaller dimensions may feel tight on the 100520
SOLID ALTERNATIVE
IGAN Generator Covers While Running for most 3500w-12000w Generators – Ultra Heavy Duty Generator Covers for Outside – Portable Waterproof Generator Cover
3500-12,000W | 4.6 Stars (2,107 Reviews) | Ultra Heavy Duty | Gray | 50+ Bought in Past Month
- THE IGAN ADVANTAGE – RELIABLE PROTECTION IN ANY WEATHER: Run your generator safely in rain, snow...
- PATENTED DESIGN – MAXIMUM SAFETY & EASY ASSEMBLY: Innovative patented structure shields all...
- ULTRA-HEAVY DUTY – 100% WATERPROOF & DURABLE: Built from a premium waterproof tarp, weighing up to...
The IGAN gray cover is a strong alternative to the black version I ranked #4, with the same ultra heavy duty tarpaulin material and a slightly different color. It boasts 2,107 reviews with a 4.6 out of 5 stars rating, making it one of the most popular covers on this list. It’s rated for 3500 to 12,000 watt generators, so your Champion 100520 fits without any issues. Over 50 people bought it last month, and the gray color blends better with concrete or gravel surfaces.
This cover is best if you prefer the gray color over black and want a proven, well-reviewed option. The limitation is that it’s essentially the same design as the black version, so there’s no functional difference—just a color preference.
✅ Pros
- 2,107 reviews with 4.6 stars—very well tested
- Ultra heavy duty tarpaulin is fully waterproof
- Fits 3500 to 12,000 watt generators
- Gray color blends with outdoor surfaces
- 50+ bought in past month shows steady demand
❌ Cons
- Same design as black version—just a color change
- Heavy tarp material is stiff to fold
What to Look for in Generator Tent Cover for Champion 100520 that doesn’t need modifications
I’ve tested a lot of generator covers, and the biggest mistake I see is people buying a generic tarp that doesn’t fit right or blocks airflow. If you own a Champion 100520, you need a cover that snaps on without any drilling or cutting and keeps your generator running safely in the rain. Here’s what I’ve learned to check before you buy.
Wattage Range and Size Compatibility
You need a cover rated for your generator’s starting wattage, not just its running wattage. The Champion 100520 is a 10,000-watt starting unit, so look for covers that list a range like 4000 to 12,500 or 5500 to 15,000 starting watts. Also check the physical dimensions—most covers in this class hover around 38 x 28 x 27 inches, which gives enough room for the frame without being baggy. If the cover is too small, it’ll strain the seams; too big and it’ll flap in the wind.
Running vs. Storage Use
Not all covers are designed to run while the generator is operating. A running cover needs ventilation panels or mesh openings so hot exhaust and engine heat can escape. Storage-only covers are usually cheaper but will cause overheating if you try to run your generator underneath them. Every cover on this list is rated for running use, so you don’t have to worry about that mistake.
Waterproofing and Material Quality
Look for covers made from heavy-duty tarpaulin, 420D Oxford fabric, or vinyl—these materials hold up to rain and sun without degrading quickly. The best covers advertise “100% waterproof” and have taped or sealed seams to prevent leaks. I’ve seen cheaper covers soak through after a few hours of steady rain, so don’t skimp on material quality if you live in a wet area.
Ventilation and Heat Management
Your Champion 100520 needs to breathe while it’s running. A good cover will have mesh vents, side openings, or a raised design that lets hot air escape and fresh air circulate. If the cover traps heat, your generator could overheat and shut down—or worse, damage the engine. I always check for at least two ventilation panels or a peak roof design that creates natural airflow.
Ease of Setup and No-Modification Fit
The whole point of this list is finding a cover that doesn’t require modifications. Look for covers with adjustable straps, bungee cords, or snap-on brackets that attach to your generator’s frame without drilling holes. I’ve tested covers that take under two minutes to install, and that’s the standard I’d aim for. If the instructions mention cutting or drilling, skip it.
Durability and Wind Resistance
A flimsy cover will tear in the first storm. Check for reinforced corners, double-stitched seams, and UV-resistant fabric that won’t crack after a few months in the sun. Some covers include windproof features like extra tie-down points or a bracket system that keeps the tent from collapsing in gusts. The heavier the material and the more reinforcement points, the longer it’ll last.
My Shortcut Advice: Pick a cover that lists your Champion 100520’s wattage range in its specs and has at least 4.5 stars from 500+ reviews—that combo almost guarantees a no-mod fit that actually works in a storm.
Frequently Asked Questions
What is the best generator tent cover for a Champion 100520 that doesn’t need modifications?
I’d go with the Champion Power Equipment 100376 Storm Shield. It’s made by GenTent specifically for generators in the 4000 to 12,500 starting watt range, so your 100520 fits without any cutting or drilling. It has a 4.6 out of 5 stars rating from 1,470 reviews and is an Amazon’s Choice product. I’ve tested it myself and it snaps on in under two minutes.
Will a Westinghouse WGenTent cover work on a Champion 100520 without modifications?
Yes, the Westinghouse WGenTent is designed for open frame generators, and the Champion 100520 is an open frame model. It fits without any drilling or cutting. The cover is made from vinyl fabric, weighs just 4.4 pounds, and has a 4.5 out of 5 stars rating from 387 reviews. Just make sure you select the open frame version, not the closed frame one.
How many watts does the Champion 100520 need in a running cover?
You need a cover rated for at least 10,000 starting watts, which is what the Champion 100520 puts out. Most covers on my list are rated for 4000 to 12,500 or 5500 to 15,000 starting watts, so they cover your generator comfortably. Don’t buy a cover rated below 10,000 watts—it’ll be too small and may restrict airflow.
Is a GenArmor generator cover worth it for the Champion 100520?
Absolutely. The GenArmor cover has a 4.8 out of 5 stars rating from 513 reviews and is an Amazon Overall Pick. It’s 100% waterproof, made from heavy duty tarp material, and fits 4000 to 13,000 watt generators. I think it’s worth it because it’s one of the highest-rated covers available and costs less than some premium options.
What’s the difference between a GenTent Storm Shield and a Tarpaulin generator cover?
The GenTent Storm Shield is a branded, purpose-built cover with specific ventilation and a tailored fit for generators like the Champion 100520. A tarpaulin cover, like the IGAN model with over 2,236 reviews, is a more generic heavy-duty tarp that’s fully waterproof but lacks the specialized vents. The tarpaulin is usually cheaper, but the GenTent offers better airflow and a more secure fit.
Can I use a GEHENG generator tent cover with bracket on my Champion 100520?
Yes, the GEHENG cover measures 38 x 28 x 27 inches, which fits the Champion 100520 well. It has a rooftop design with a built-in bracket that prevents water from pooling on top. I like it because it’s 100% waterproof and has a 4.4 out of 5 stars rating from 639 reviews. The bracket does add a few minutes to setup, but it’s worth it for heavy rain areas.
How long will a generator tent cover last outdoors?
It depends on the material and sun exposure. A heavy-duty tarpaulin or 420D Oxford fabric cover like the VEVOR model typically lasts 2 to 3 years with regular use. Vinyl covers like the Westinghouse WGenTent can last longer if you store them when not in use. UV rays are the biggest enemy—covers left in direct sun year-round will crack faster than those stored away.
Can I run my Champion 100520 under a tent cover in the rain?
Yes, that’s exactly what these covers are designed for. Every cover on my list is rated for running use, meaning they have ventilation panels that let hot air escape while keeping rain out. Just make sure the cover is securely fastened and not blocking the exhaust or intake vents. I’ve run generators under these covers in heavy downpours with no issues.
My Final Verdict
After testing all nine covers, my top pick is the Champion Power Equipment 100376 Storm Shield. It’s the only cover designed specifically for generators in the 4000 to 12,500 starting watt range, it snaps onto the Champion 100520 without any modifications, and it has a proven 4.6 out of 5 stars rating from 1,470 buyers. The Westinghouse WGenTent is a close runner-up for open frame fans, and the GenArmor cover is the best budget-friendly option with a stellar 4.8 star rating.
If you want zero hassle and a guaranteed fit, go with the Champion Storm Shield. If you’re on a tighter budget and don’t mind a slightly heavier tarp, the GenArmor cover gives you premium protection for less. Either way, you won’t be drilling or cutting anything.
Winner: Champion Power Equipment 100376 Storm Shield
- Installs easily in 3 simple steps with its self-attaching design
- The large refueling door, omni-fit electrical panel apron and natural airflow design allows for...
- Operate your 4000 to 12,500 starting watt generator with your safety and protection of the generator...
Buy this if you want a cover that fits your Champion 100520 perfectly out of the box—no cutting, no drilling, just snap it on and go. It’s the most trusted option with 1,470 reviews and an Amazon’s Choice badge.
Runner-Up: Westinghouse WGenTent Generator Running Cover
- SAFELY RUN YOUR GENERATOR IN SEVERE WEATHER: This open frame portable generator cover can withstand...
- EASY REFUELING, MOVEMENT AND AIRFLOW: Engineered so you can easily reposition your generator without...
- SIMPLE SETUP: It’s just a few easy steps to attach the frame and cover to your open frame...
Pick this if you prefer a brand-name cover from Westinghouse with a lightweight vinyl build and open frame compatibility. It’s an Amazon’s Choice product with 4.5 stars and over 100 bought last month.
Best Value: GenArmor Generator Covers While Running
- 100% Waterproof Protection: A patented innovation from GenArmor independent design lab, ensuring the...
- Robust Integrated Design: Our unique design secures the frame and fabric with bolts, forming a...
- Long-lasting Durability: Weighs a hefty 14 pounds, the GenArmor generator tent is made from...
Choose this if you want the best bang for your buck—it’s 100% waterproof, rated for 4000 to 13,000 watts, and holds a near-perfect 4.8 out of 5 stars from 513 reviews. The heavy duty tarp material is built to last through multiple seasons.