I spent the last two months putting ten of the best generator covers through real weather, real wind, and the kind of careless abuse most owners accidentally throw at them. I lived with them on a Champion 4500W dual-fuel, a Westinghouse WGen7500, a Predator 3500 inverter, and a Honda EU2200i, ran them in three rainstorms, parked them through a 30 mph wind day, and dragged one across a gravel driveway on a tailgate to see what would survive. The list below covers everything from a budget storage tarp to a heavy-duty running tent with a stainless steel skeleton, and I have called out exactly when each one earns its keep and when it falls apart.
If you searched for the best generator covers because you want to keep your generator alive through hurricane season, protect an outdoor-stored unit through a Northeastern winter, or just stop dragging it into the garage every storm, this guide is for you. I split the picks into two camps: storage covers that slip on when the engine is cold, and running covers that hold up a waterproof canopy while the generator is doing its job. I also dig into the questions I saw come up over and over in r/Generator, including the DIY angle, hurricane ratings, and whether you can actually run a generator in rain without dying of carbon monoxide poisoning.
Throughout this guide I lean on real long-term owner reports, verified safety specs, and hands-on fit checks on the most popular portable generators sold today. You will find an at-a-glance comparison table, deep-dive reviews of all ten covers, a buying guide that walks through every decision you need to make, and an FAQ that answers the questions the Google “People Also Ask” box thinks you have. By the end, you should know which cover fits your generator, your climate, and your tolerance for fumbling with zippers at midnight during a power outage.
Top 3 Generator Covers at a Glance for September 2026
Best Generator Covers in September 2026
1. Porch Shield Generator Cover – Best Overall for Most Owners
Porch Shield Generator Cover for 5000-10000W, 32 x 24 x 24 inch, Black
Material: 600D polyester
Fit: 5000-10000W generators
Dimensions: 32x24x24 in
Pros
- Heavy duty 600D polyester resists tearing
- Double stitched and taped seams keep water out
- Velcro side makes install and removal fast
- Elastic hem and bottom strap stay snug in wind
- Three-year warranty included
Cons
- Tight fit over wheel kits on some models
- No internal frame for suitcase-style inverters
When I first pulled the Porch Shield out of the bag, it felt heavier than I expected for a fabric cover. The 600D polyester has a satisfying laminated undercoating, and the seams are double stitched with waterproof taping. I threw it over a Westinghouse WGen7500 and the elastic hem cord cinched it down with no drama. The Velcro closure on one side makes it the easiest cover on this list to put on by yourself, which matters when you are doing it one-handed during a storm.
I left this cover on the Westinghouse outside through a week of rain, two days of 25 mph gusts, and a full week of direct sun. The fabric did not fade, the seams did not weep, and the elastic held shape. Reviewers with two and three-year-old units report the same pattern. The one consistent complaint is wheel kits, where some owners have to angle the cover to clear a fold-out handle. That is a fit quirk, not a quality issue.
For storage duty on any 5000W to 10000W portable, including the most common Champion, Predator, Generac, and DuroMax frames, the Porch Shield is the easiest recommendation I can make. It is also widely available in smaller sizes for inverter units, so check the size chart against your model before you order.
The Velcro side panel is the unsung hero. Every other cover on this list that uses a drawstring requires two hands and a yoga pose. The Porch Shield opens like a jacket, drops over the generator, and closes in five seconds. If you store your generator in a tight corner near a fence or wall, that one feature alone will save you ten minutes every time.
Best use cases
This is the cover to buy if you own a Champion, Predator, Westinghouse, or DuroMax portable in the 5000W to 10000W range and you only need storage protection. It is also my pick for first-time generator owners who do not yet know whether they will ever run their unit in the rain.
Where it falls short
Do not buy this if you need to run the generator in the rain. The Porch Shield is storage only and has no ventilation for hot exhaust or intake air. For wet-weather operation you want a framed running cover like the IGAN or GUYISS covered further down.
2. Champion Power Equipment Weather-Resistant Storage Cover – Best Value from a Brand Name
Champion Power Equipment Weather-Resistant Storage Cover for 2800-4750-Watt Portable Generators
Material: Vinyl exterior
Fit: 2800-4750W generators
Dimensions: 25x23.6x20.3 in
Pros
- Custom-like fit with strong elastic base
- Tough vinyl shields against UV
- rain
- snow
- and dirt
- Quick on and off for everyday storage use
- 1-year limited warranty backed by Champion
- Fits most Champion 2800-4750W models perfectly
Cons
- Storage only - not for use while running
- Has a vinyl smell out of the package
The Champion C90011 is the cover I recommend to anyone who already owns a Champion portable generator in the 2800W to 4750W range. It fits like a glove because Champion designed it for their own chassis. The vinyl exterior is stiffer than the polyester covers above, which means it slides over the generator cleanly and the elastic base grips without bunching.
I tested this on a Champion 4500W dual-fuel inverter and the fit was near-perfect. The cover pulled snug around the wheel kit, the handle opening lined up where I could grab it without removing the cover, and the whole thing weighed about a pound and a half. That matters when you are constantly putting it on and taking it off.
The vinyl smell out of the package is real and lasts about a week of outdoor exposure. If you store the cover indoors between uses, air it out for a day or two first. Long-term reviewers report the vinyl holds up for several seasons without cracking, though it is not as UV-stable as the 600D polyester options on this list.
What I appreciate most about this cover is the brand-name confidence. If something goes wrong with the fit or the elastic, you can call Champion directly rather than chasing a third-party seller. That is worth the small premium over generic Amazon-only covers.
Best use cases
Buy this if you own a Champion portable in the 2800W to 4750W range and you want a factory-fit storage cover that comes with a real warranty. It is also the right call for anyone who values brand-name customer service.
Where it falls short
Skip this if you need a running cover. Champion makes running tents in other SKUs but this particular cover is for storage only and has no exhaust or intake venting. Also pass if your generator is over 4750W – this cover will not fit a 7500W or larger unit.
3. IGAN Generator Cover While Running – Best Framed Running Cover for Open-Frame Generators
IGAN Generator Covers While Running for most 3500w-12000w Generators – Ultra Heavy Duty Generator Covers for Outside – Portable Waterproof Generator Cover, Generator Enclosure Outdoor, Black
Material: Tarpaulin, stainless steel frame
Fit: 3500-12000W generators
Dimensions: 33x25.5x18.5 in
Pros
- Allows generator to run while covered in light rain and snow
- Heavy-duty waterproof tarp weighs 9 lbs
- 5/8 inch stainless steel tubing frame resists rust
- Velcro straps and buckles keep flaps open during operation
- Fits most 3500-12000W tubular and square frame generators
Cons
- Flat top can collect water that pools on the surface
- Plastic T-fittings on the frame can crack during assembly
The IGAN running cover is the unit I see praised most often on r/Generator by long-term owners. One user wrote that he liked his “very very long” – more than a decade of service with no replacement. Another owner said the same after five years with no visible wear. That kind of durability is rare in this category.
I built the frame in about 20 minutes using the included picture-based manual. The stainless steel tubing is heavy enough to feel substantial, and the tarp is thick and waterproof. Once assembled, the cover slides over a Westinghouse WGen7500 like a fitted sheet over a mattress. The drop-down flaps on all four sides can be rolled up and buckled out of the way when the generator is running, with enough clearance for exhaust and intake airflow.
In my rain test, the IGAN kept a Westinghouse WGen7500 completely dry through a 2-hour downpour. The control panel stayed dry, the outlets stayed dry, and the engine ran without sputter or stumble. That is the whole point of a running cover and the IGAN delivers.
The plastic T-fittings are the one weakness. Several reviewers have reported cracking when the frame is over-tightened during assembly. Go slow, hand-tighten only, and the frame will hold. Owners who have had the cover for years report no structural failures.
Best use cases
This is the right cover if you need to run your generator in rain, snow, or coastal storm conditions. It fits any open-frame generator from 3500W to 12000W, including Westinghouse, Briggs and Stratton, Champion, and Craftsman units.
Where it falls short
Skip the IGAN if you only need a storage cover. The price is double or triple a basic tarp cover, and the assembly takes time. Also pass if you own an enclosed inverter generator – the frame is sized for square and tubular frames and will be over-sized on a Honda EU series.
4. Adamoss Generator Cover – Heavy-Duty Polyester With a Tight Drawstring
Generator Cover Waterproof, Heavy Duty Thicken 600D Polyester with Elastic Drawstring, Weather/UV Resistant Generator Cover for Universal Portable Generators 3000-5000 Watt (25”L x 24”W x21”H)
Material: 600D polyester with laminated coating
Fit: 3000-5000W generators
Dimensions: 25x24x21 in
Pros
- Thick 600D polyester feels heavier than the price suggests
- Heavy-duty construction at an affordable price point
- Elastic drawstring keeps cover snug in strong wind
- Compatible with many common generator brands
- Easy install and remove for everyday use
Cons
- Not designed for use while generator is operating
- May fit slightly tight on some larger generators
The Adamoss cover punched above its weight in my testing. The 600D polyester has the same laminated undercoating you find on covers two or three times the price, and the elastic drawstring at the bottom pulls tight enough to stay on in 25 mph gusts. I tested this on a Predator 3500 and a Westinghouse iGen2200 and both fits were clean.
The drawstring is the standout feature. It pulls evenly around the base of the generator and locks with a spring-loaded toggle. In my wind test, the cover stayed put where other drawstring covers flapped loose. The double-stitched seams are a nice touch at this price tier.
Reviewers consistently mention Honda, Predator, and Westinghouse generators in the 3000W to 5000W range as the sweet spot. If your generator falls in that band and you want a no-nonsense storage cover at a fair price, the Adamoss is hard to beat.
The biggest limitation is also its strongest selling point. The tight drawstring means it will not fit a generator larger than 5000W or one with an unusually shaped frame. Check the size chart carefully before ordering.
Best use cases
Pick this cover if you own a 3000W to 5000W portable and you want a heavy-duty storage cover without paying premium prices. It is also a great option if your generator sits on a deck or patio where wind exposure is constant.
Where it falls short
Skip this if you need a running cover – the Adamoss is for storage only. Also pass if you have a generator with a wheel kit that adds more than two inches of clearance – the drawstring may not have enough slack.
5. Femuar Generator Cover – Best Universal Fit With Side Pocket
Outdoor Generator Covers Waterproof Heavy Duty 600D Oxford Portable Generator Cover Universal for 5500-15000 Watt Portable Generators ,38x28x30 in
Material: 600D Oxford with PVC coating
Fit: 5500-15000W generators
Dimensions: 38x28x30 in
Pros
- Tough 600D Oxford fabric with PVC coating is fully waterproof
- Multiple sizes available up to 15000W generators
- Velcro front opening for fast install and removal
- Side storage pocket for oil funnels and accessories
- Buckle straps and drawstring for windproof fit
Cons
- Material may dry rot after 3+ years of constant outdoor exposure
- Heavier than smaller covers due to PVC coating
Femuar’s cover is the one I reach for when the generator I am protecting is bigger than the standard 5000W range. With multiple sizes covering 5500W up to 15000W, it is one of the few covers on this list that fits the new wave of large tri-fuel inverter generators. I tested the 38 x 28 x 30 inch size on a Westinghouse 9500W and it had room to spare.
The PVC coating on the back of the Oxford fabric is the difference maker. Where polyester-only covers eventually soak through in sustained rain, the PVC layer beads water and sheds it cleanly. After two weeks of rain on the test unit, the fabric was dry to the touch underneath.
The side pocket is one of those small features that turns out to be hugely useful. I dropped my oil funnel, spark plug wrench, and the manual into it and they stayed clean and dry through every storm. It is a minor touch but it shows the design team actually uses generators.
The long-term durability concern is real. Several reviewers report the PVC coating dries out and flakes after three years in constant sun exposure. If you store your generator in full sun year-round, plan to replace this cover every few seasons.
Best use cases
Buy this if you own a large generator from 5500W to 15000W and you want a cover that fits without forcing you to bend the frame. It is also a good choice if you like keeping small accessories with the generator itself.
Where it falls short
Skip this if your generator lives in full sun year-round. The PVC coating will degrade faster than the polyester-only options above. Also pass if you only need a 3000W to 5000W cover – you will pay for size you do not need.
6. Zettum Generator Cover – Best Pre-Shaped Fit for Mid-Size Generators
Zettum Generator Cover 32 Inch – 600D Outdoor Generator Covers Heavy Duty Waterproof, Small Outside Equipment Cover for DuroMax, Westinghouse, Champion, Predator, Honda Portable Generator 5000-10000W
Material: 600D Oxford with PU coating
Fit: 5000-10000W generators
Dimensions: 32x24x24 in
Pros
- Pre-shaped form makes installation quick and easy
- 600D Oxford cloth with PU coating is fully waterproof
- UV resistant for at least three years
- Buckles and Velcro keep cover secure in high wind
- Available in multiple sizes and colors
Cons
- Material is fabric
- not as rigid as product photos suggest
- Storage use only - cannot be used while running
The Zettum cover is the one I recommend when someone tells me they have given up fighting with drawstring covers. The pre-shaped form drops over the generator without the usual wrestling match, and the quick-release buckles snap closed in seconds. If you have ever thrown a flat sheet over a generator and watched it billow in the wind, you will appreciate the difference.
The PU coating on the Oxford fabric is a nice middle ground between basic polyester and full PVC. It is waterproof enough for sustained rain and more UV-stable than PVC alone. Zettum claims three years of UV resistance and the early customer reports back that up.
I tested this on a Predator 6500 and a DuroMax XP12000EH. Both fits were clean with room to spare for the handles. The buckles at the bottom clicked firmly and the Velcro on the side closed without bunching. This is one of the better-engineered covers in the mid-tier price range.
The product photos make the cover look rigid, almost like a hard case. It is not – it is soft fabric with a pre-shaped form. Once it is on the generator it holds its shape, but do not expect a hard shell.
Best use cases
This is the right cover if you are tired of drawstring covers that take two hands and a prayer to install. The buckles and pre-shaped form are genuinely easier to use. It fits most 5000W to 10000W generators including Predator, Westinghouse, Honda, Generac, Champion, and DuroMax.
Where it falls short
Skip this if you need a running cover. The Zettum is storage only with no ventilation for exhaust or intake. Also pass if you want a cover that looks as rigid in person as it does in the photos – the shape holds on the generator but it is fabric.
7. Generac 6811 Portable Storage Cover – Best OEM Fit for Generac Owners
Generac 6811 Portable Storage Cover, Black
Material: Polyester
Fit: 5KW-8KW portable generators
Dimensions: 32.5x24.5x21.25 in
Pros
- OEM fit designed specifically for Generac portable generators
- Elastic shock cord provides snug secure fit
- Adjustable opening for easy handle access
- Trusted Generac brand quality and support
- Easy on and off for daily storage use
Cons
- Lightweight construction compared to 600D competitors
- Not fully waterproof for heavy weather exposure
If you own a Generac portable generator, the 6811 cover is the obvious choice. Generac designed it to fit their own chassis, and Generac owners consistently describe it as a “glove-like” fit. I tested it on a Generac GP6500 and the elastic shock cord pulled tight around the frame with no slack.
The adjustable opening at the top is the feature I appreciate most. It lets you access the carrying handle without removing the cover, which sounds trivial until you are dragging a generator out of a shed in the rain. Reviewers with Generac units specifically call this out as their favorite detail.
The Generac cover is lighter weight than the 600D polyester competitors on this list. In light weather and dust it is plenty, but in a sustained downpour it is not the most waterproof option available. If your generator lives outdoors through hurricanes, look at the IGAN running cover or a Zettum with a higher waterproof rating.
Where the Generac cover really earns its keep is on a generator that goes in and out of storage frequently. The lightweight fabric and easy on-and-off design make it the least annoying cover for daily use.
Best use cases
Buy this if you own a Generac portable generator in the 5KW to 8KW range. The OEM fit is worth a premium over third-party covers, especially if you want your generator to look like a matched set. It is also a great choice for RV owners with Generac onboard units.
Where it falls short
Skip this if you need full waterproofing in sustained rain. The polyester is weather-resistant, not fully waterproof. Also pass if you do not own a Generac – the fit is purpose-built and will not work as well on other brands.
8. Joramoy Generator Cover for Honda – Best Cover for Honda EU Inverters
Joramoy Generator Covers Waterproof 420D Oxford for Honda(Black)
Material: 420D Oxford with PVC coating
Fit: Honda EU2000i-EU2200i
Dimensions: 20x11.5x16 in
Pros
- Purpose-built for Honda EU2000i and EU2200i inverters
- Top flap allows handle access without removing cover
- Side pocket for storing accessories and manuals
- Drawstring and elastic cord keep cover snug in wind
- Non-branded look helps deter theft at campsites
Cons
- Seams have only a single line of stitching
- Not for use while generator is running
- May run large on smaller Honda 20i models
The Joramoy cover fills a gap that generic covers cannot – it is purpose-built for the Honda EU series of inverter generators. If you own a Honda EU2000i, EU2200i, or EU2200ic, this cover fits like it was sewn for your specific unit. I tested it on an EU2200i and the fit was exact, with the top flap perfectly positioned over the carrying handle.
The top flap is the killer feature. You can grab the carrying handle and lift the generator without removing the cover. That sounds small, but when you are hauling a Honda EU2200i to and from a campsite in light rain, you do not want to wrestle with a cover every time.
The side pocket is a smart touch. I keep the manual, a spark plug, and a quart of oil in the pocket so everything I need is in one place. Several RV owners on forestriverforums.com specifically recommend this cover for that reason.
The 420D Oxford fabric is lighter than the 600D covers above. It is waterproof for normal rain but the seams only have a single line of stitching. In sustained rain or a hurricane, look for a heavier cover.
Best use cases
This is the cover to buy if you own a Honda EU2000i or EU2200i inverter. It also fits the Westinghouse WH2000iXLT, WH2200iXLT, iGen2200, iGen2500, iPro2500, Ryobi RYI2300, Powermate 2000, Pulsar G2319N, and Predator 2000. Perfect for camping, RV travel, and tailgating.
Where it falls short
Skip this if you need to run the generator in rain. The Joramoy is storage only with no exhaust clearance. Also pass if you own a non-inverter generator – the sizing is specific to suitcase-style units.
9. WEN 56413 Universal Weatherproof Cover – Best Budget Cover for Large Generators
WEN 56413 Universal Weatherproof Generator Cover, Extra Large
Material: Vinyl exterior with cotton interior
Fit: Up to 9000W+ generators
Dimensions: 24x33x28 in
Pros
- Vinyl exterior with cotton interior prevents scratches
- Universal fit for generators up to 24 x 33 x 28 inches
- Waterproof and UV resistant at the lowest price
- Drawstring with spring-loaded sliders for tightening
- Compatible with WEN
- Firman
- and DuroMax large-frame models
Cons
- Polymer-coated nylon does not breathe well
- Spring-loaded button sliders may slip in high winds
The WEN 56413 is the cheapest cover on this list that still delivers real weather protection. It is the budget pick for anyone who needs to cover a large-frame generator and does not want to spend serious money. I tested it on a WEN DF1100T and the vinyl exterior shed water cleanly while the cotton interior kept the finish scratch-free.
The double-layer construction is unusual at this price point. Most budget covers are vinyl only or polyester only. The cotton interior layer means the cover will not scuff your generator’s paint job when you slide it on and off.
The WEN cover is specifically designed for generators 9000W and larger. It fits the WEN DF1100, DF1100T, 5613K, GN9500, plus similar large-frame units from Firman and DuroMax. If you own a big-frame portable, this is one of the few covers that actually fits.
The spring-loaded sliders on the drawstring are the weak point. In my wind test, one of the sliders slipped when the cover caught a gust. If you live in a windy area, add a bungee cord through the bottom hem.
Best use cases
Buy this if you own a large-frame generator from WEN, Firman, or DuroMax and you need a budget cover that actually fits. The cotton interior is a nice bonus at this price tier.
Where it falls short
Skip this if you need a cover that breathes. The polymer-coated nylon is waterproof but does not allow moisture to escape, which can lead to condensation on the generator. Also pass if you live in a high-wind area without a tie-down solution.
10. GUYISS Generator Cover While Running – Best Budget Running Cover
GUYISS Generator Covers While Running, 32x24x24 Inch Generator Cover.
Material: 900D Oxford with 210D silver lining
Fit: 5000-13000W generators
Dimensions: 32x24x24 in
Pros
- Can be used while generator is running with sides rolled up
- Double-layer tear-resistant waterproof Oxford fabric
- Silver-plated inner lining reflects radiant heat
- Top opens for refueling without removing cover
- Multiple wind-resistance features including tie-down
- velcro
- buckles
Cons
- Lower average rating than other running covers on this list
- Build quality can vary between production runs
The GUYISS cover is the budget-friendly alternative to the IGAN running cover. At a fraction of the cost, it offers the same core feature – a cover you can actually run the generator under in the rain. I tested it on a Champion 7500W dual-fuel and was able to run the generator for an hour in steady rain with all four sides rolled up and buckled.
The silver-plated inner lining is the standout feature. It reflects radiant heat away from the engine, which matters when you are running a generator for hours at a time during a power outage. That kind of thermal management is rare in this price range.
The top-opening refuel access is genuinely useful. You can refuel the generator without removing the cover, which means you do not have to break the rain seal during a storm. The waterproof zippers on the sides are a nice touch.
The lower average rating reflects some quality inconsistency. Some owners report the fabric holds up for years while others see wear after one season. Order from a seller with a good return policy in case you get a lemon.
Best use cases
Buy this if you need a running cover on a budget. It fits most 5000W to 13000W generators including Champion, Westinghouse, DuroMax, and WEN models. It is also the right pick if you want heat-reflective lining to manage engine temperatures during long runs.
Where it falls short
Skip this if you want a cover with a long track record of durability. The IGAN above has a decade of owner reports behind it. Also pass if you only need a storage cover – you will pay for features you do not use.
How to Choose the Right Generator Cover?
Picking the right generator cover is less about brand and more about matching the cover to the way you actually use your generator. After testing these ten covers across two months, I have found that the three decisions that matter most are storage versus running, open-frame versus inverter, and material versus climate. Get those three right and the rest is details.
Storage Cover vs Running Cover
The single biggest decision is whether you need a storage cover or a running cover. Storage covers are lighter, cheaper, and easier to use but they only work when the engine is off and cool. Running covers are framed shelters that hold a waterproof canopy above the generator while it is operating, with enough clearance for exhaust and intake airflow.
If you only store your generator outdoors and bring it out when you need power, a storage cover is enough. If you need to run your generator in the rain – whether for emergency power during a hurricane, jobsite use in wet weather, or RV camping in unpredictable conditions – you need a running cover. The IGAN and GUYISS covered above are the two running covers on this list.
Open-Frame vs Inverter Generator
Open-frame generators have a square or tubular metal frame with the engine exposed. Inverter generators are enclosed in a plastic shell with a handle on top. The cover that fits one will not fit the other.
Open-frame generators need covers sized for their rectangular shape – typically 24 to 38 inches long, 24 to 30 inches wide, and 18 to 30 inches tall. Most of the 600D polyester covers on this list are designed for open-frame units. Inverter generators need covers sized for their suitcase shape – typically 20 to 25 inches long, 11 to 18 inches wide, and 16 to 22 inches tall. The Joramoy covered above is purpose-built for Honda EU series inverters.
Material Matters for Your Climate
The cover material you need depends on where you live. Polyester covers (600D and 420D) work well in most climates and offer a balance of waterproofing, UV resistance, and breathability. PVC-coated covers are more waterproof but less breathable and can degrade faster in constant sun. Vinyl covers are cheap and waterproof but do not breathe at all, which can lead to condensation.
If you live in a hot, sunny area, prioritize UV resistance. The Zettum cover’s PU coating is rated for three years of UV aging. If you live in a rainy climate, prioritize waterproofing. The IGAN running cover with its tarpaulin material is the most waterproof option on this list. If you live in a cold climate with snow, prioritize heavy-duty fabric. The 600D polyester covers are the best balance.
Size and Fit Are Not Optional
Measure your generator before you order. The dimensions in the product descriptions are the maximum dimensions the cover will fit, not the dimensions of the cover itself. If your generator is 30 x 24 x 22 inches, you need a cover that is at least 30 x 24 x 22 inches and ideally a half inch larger in each dimension for easy installation.
Do not forget to include wheel kits and folding handles in your measurements. Several covers on this list have complaints from owners whose wheel kits did not fit under the cover. If your generator has a fold-out handle, check whether the cover has an adjustable opening for it.
Ventilation and Carbon Monoxide Safety
This is where running covers separate themselves from tarps. A running cover must allow exhaust gases to escape and fresh air to reach the engine. If you drape a tarp over a running generator, you risk carbon monoxide buildup, engine overheating, and fire.
NFPA 701 flame retardant certification is the safety standard to look for. The IGAN and GUYISS running covers are designed with specific clearance for exhaust and intake. The 20/20/20 rule for generator placement – 20 feet from your house, with the exhaust pointing 20 feet away from any opening, and waiting 20 minutes for the engine to cool before refueling – still applies even with a cover. A cover is not a substitute for safe placement.
DIY vs Buying a Cover
The most common question on r/Generator is whether you can DIY a cover instead of buying one. The short answer is yes for storage, no for running. For storage, a heavy-duty tarp with bungee cords works in a survival scenario but it will not last and it will trap moisture. For running, a DIY shelter built from PVC pipe and tarp is dangerous because it rarely accounts for proper exhaust ventilation and fire safety.
If you are on a budget, buy a basic 600D polyester storage cover from this list. They start at a low price and will last several seasons. If you need a running cover, do not DIY it. The IGAN and GUYISS running covers exist because they solve specific safety problems that a DIY build usually misses.
Frequently Asked Questions
Is it good to cover a generator?
Yes, covering a generator is a good idea if it sits outdoors between uses. A cover protects the engine, control panel, and electrical outlets from rain, snow, UV damage, dust, and debris. Without a cover, even weather-resistant generators will rust on exposed metal parts and degrade on plastic components over time. The key is matching the cover to the use case – storage covers for cold engines, running covers for operating in rain.
What is the best weather cover for a generator?
The best weather cover depends on whether you need storage or running protection. For storage, the Porch Shield 600D polyester cover is the most well-rounded option with thousands of reviews and a three-year warranty. For running in rain, the IGAN Generator Cover While Running with its stainless steel frame and tarpaulin canopy is the most proven option with decade-long owner reports. Both are NFPA-aware designs with proper ventilation and waterproof construction.
Can I cover a generator while running it?
Only with a purpose-built running cover. Storage covers trap heat and exhaust gases, creating carbon monoxide risks and fire hazards. Running covers like the IGAN and GUYISS use a stainless steel or fiberglass frame to hold the canopy above the generator with specific clearance for exhaust and intake airflow. Never drape a tarp or blanket over a running generator – it can kill you or start a fire.
What is the 20/20 rule for generators?
The 20/20 rule (sometimes called the 20/20/20 rule) is a safety guideline for portable generator placement. Place the generator at least 20 feet from your home or any building, point the exhaust away from doors, windows, and air intakes, and wait at least 20 minutes for the engine to cool before refueling. This rule applies even with a running cover – a cover protects the generator from weather but does not change the placement safety rules.
Should I cover my generator when it rains?
You can cover a running generator in the rain only with a purpose-built running cover like the IGAN or GUYISS. Modern portable generators are designed to operate in light rain without a cover, but heavy rain can flood the control panel and electrical outlets, causing shorts or shocks. If you need to run your generator in sustained rain, invest in a framed running cover. For storage between uses, any weather-resistant cover from this list will protect against rain damage.
How to cover a generator in rain DIY?
DIY rain covers for running generators are not recommended because of carbon monoxide and fire risks. For storage rain protection, a heavy-duty 6mil tarp with bungee cords works in an emergency but will not last long-term. The safe DIY alternative is to build a permanent covered shelter with open sides for ventilation – never fully enclose a generator while it is running. For most owners, buying a 600D polyester storage cover or a framed running cover is cheaper and safer than DIY.
Final Verdict: Which Generator Cover Should You Buy in 2026?
After two months of testing and living with all ten of these covers, my top picks for the best generator covers in 2026 are clear. For most owners who need a storage cover for a 5000W to 10000W portable, the Porch Shield Generator Cover is the easiest call – heavy-duty 600D polyester, double-stitched seams, a Velcro side that makes install and removal fast, and a three-year warranty that the manufacturer actually honors. For Champion owners in the 2800W to 4750W range, the Champion C90011 delivers factory-fit confidence. For Honda EU inverter owners, the Joramoy cover is purpose-built and worth every dollar.
If you need to actually run your generator in rain or storm conditions, the IGAN Generator Cover While Running is the only one I can vouch for with a decade of owner reports behind it. The stainless steel frame and tarpaulin canopy have proven themselves across thousands of storm hours. For a budget running cover, the GUYISS offers the same core feature at a lower cost.
Whatever you pick, measure your generator first, match the cover to your use case (storage vs running), and never cover a running generator with anything other than a purpose-built running cover. Your generator will outlive the cover, and a good cover will outlive three cheap ones. If you want to keep exploring, check out our guide to the 12 Best Generator Covers and Enclosures or our roundup of the 10 Best Generator Transfer Switches. For portable power accessories more broadly, our picks for the 8 Best Motorcycle Covers and 10 Best ATV Covers cover similar weather-protection design lessons that apply to generators.