10 Best Predator Generator Covers for 2026: Fits That Stay Put
The best Predator generator cover right now is the PREDATOR Generator Storage Cover, Large, sized for most generators over 6500 watts. We compared 10 covers from published listings and retailer specifications, scoring each on Value for Money, Durability, and Ease of Use. Most covers look identical on paper but fail on fit, and that gap is what this comparison exposes. Whether you need a Predator 3500, 6500, or 9500 cover, this guide gives you one clear answer.
Assumed draft, read this first: the products, scores, and rankings in this article are assumed editorial estimates, not supplied, researched, or tested picks. Product names and listed sizes were checked against published roundups and retailer listings, including Harbor Freight, but no cover was personally tested and no hands-on testing was done.
Quick Comparison: All 10 Products Ranked
| # | Product | Best For | Rating | Badge | |
|---|---|---|---|---|---|
| 1 | PREDATOR Generator Storage Cover, Large | Large Predators over 6500 watts | 4.9/5 | Best Overall | Buy → |
| 2 | Adamoss Generator Cover for iGen4500 and Predator 3500 4375 | Predator 3500 and 4375 inverters | 4.8/5 | Best for Predator 3500 | Buy → |
| 3 | Zettum Generator Cover 32 Inch for Predator 9500 8750 6500 | Predator 9500, 8750, and 6500 | 4.7/5 | Best for Large Predators | Buy → |
| 4 | PREDATOR Generator Storage Cover, Medium | Predators up to 5000 watts | 4.7/5 | Best Medium Fit | Buy → |
| 5 | NGB Generator Running Cover for Predator 5000 | Running use on Predator 5000 | 4.6/5 | Best Running Cover | Buy → |
| 6 | D&ONEHOS Waterproof Universal Generator Cover for Predator 3500 4375 | Budget Predator 3500 and 4375 storage | 4.6/5 | Best Budget | Buy → |
| 7 | Joramoy Generator Cover for Predator 3500 | Everyday Predator 3500 storage | 4.5/5 | Best Everyday Fit | Buy → |
| 8 | Rosefray Generator Cover for Predator 3000-5000W | Predator 3000-5000W in wind | 4.5/5 | Best Wind Hold | Buy → |
| 9 | WLEAFJ Generator Cover for Predator 5000-10000W | Large universal Predator storage | 4.4/5 | Best Universal Large | Buy → |
| 10 | GCD Fits Harbor Freight Predator 3500 Generator Cover Custom Fit | A tailored Predator 3500 fit | 4.3/5 | Best Custom Fit | Buy → |
How We Chose These Predator Covers
What we compared
We compared 10 covers from published listings and retailer specifications, checking stated size, material, Predator fit, and closure type. No cover was personally tested.
Our 3 scoring criteria
Value for Money, Durability, and Ease of Use. Scores are assumed editorial estimates, not measured test results.
Expert consulted
No named expert was consulted for this assumed ranking. We relied on manufacturer and retailer listings, including Harbor Freight and Predator manuals.
What we cut — and why
We cut generic tarps with no stated Predator fit and running tents with no stated Predator size, because fit is the main failure point for Predator owners.
What to Look for When Buying a Predator Generator Cover
Predator covers fail most often on fit, not fabric. Measure length, width, and height with wheels and handles included, then match the cover size to your exact Predator model.
1. Fit and Adjustability
A Predator 3500 is a closed-frame inverter, while a Predator 9500 is a much larger open-frame unit, so one universal size cannot fit both well. Look for a stated size and a named Predator model list, plus a drawstring, elastic hem, or buckle that pulls the base tight. The best Predator portable generators vary widely in size, so check your model before you buy.
2. Material Quality
Most covers in this list use 600D polyester or Oxford fabric with a waterproof coating, which is a good baseline for rain, dust, and sun. Look for a stated denier, a PU or PVC coating, and sealed or strong seams. Thinner tarpaulin can work for short garage storage, but it tears sooner outdoors. For inverter models, also check the inverter generator covers guide for closed-frame fit notes.
3. Safety Features
Predator manuals state clearly: do not cover the generator or its engine during operation. Storage covers are for a cool, stopped generator only. A running cover is a different product, with ventilation, panel access, and a refueling opening, and it must still follow the manual for your model. Never use a tight storage cover while running, and never run a generator indoors.
4. Long-Term Durability
UV, wind, and repeated fitting wear a cover out faster than rain alone. Look for UV resistance, a windproof closure, and reinforced corners where handles rub. A cover that stays put in wind will last longer than a loose cover that flaps. Store the cover dry and clean when not in use, and check the drawstring and seams each season.
PREDATOR Generator Storage Cover, Large — Direct fit for big Predators
Best for: Large Predator generators over 6500 watts
Predator owners with a 6500, 8750, or 9500 need a cover that actually reaches the base without pulling tight at the corners, and this Harbor Freight large cover is built for that job. Its listed size is 33 inches long, 24 inches wide, and 28 inches high, which suits most generators over 6500 watts. The weather-resistant exterior and soft inner lining help protect paint and panels in storage and transport, while the locking drawstring keeps the cover seated. It is storage-only, so let the generator cool fully before covering it. That direct fit is why it leads this list.
- Direct Harbor Freight fit, 33 by 24 by 28 inches
- Soft inner lining protects paint and panels
- Locking drawstring holds cover in wind
- Storage-only, not for running use
- Too large for Predator 3500 models
4.8/5
4.9/5
4.9/5
Adamoss Generator Cover for iGen4500 and Predator 3500 4375 — Snug 3500 fit
Best for: Predator 3500 and 4375 inverter generators
Predator 3500 and 4375 owners often buy a cover that is either too loose or too short, and this Adamoss cover is sized for that exact closed-frame shape. Its listed size is 24 inches long, 18 inches wide, and 20 inches high, with thick 600D polyester and an elastic drawstring for a snug hold. The weather and UV-resistant fabric helps in garage, shed, and covered outdoor storage. It is not a running cover, so use it only after the generator cools. For a 3500 or 4375, that precise fit is the main reason to choose it.
- Exact 24 by 18 by 20 inch fit
- Thick 600D polyester, weather and UV resistant
- Elastic drawstring for snug hold
- No running use, storage only
- Only one colour, black
4.9/5
4.7/5
4.8/5
Zettum Generator Cover 32 Inch for Predator 9500 8750 6500 — Roomy large fit
Best for: Predator 9500, 8750, and 6500 generators
Large Predators are hard to cover because the frame, wheels, and handles add bulk, and this Zettum 32-inch cover is sized for that larger footprint. Its listed size is 32 inches long, 24 inches wide, and 24 inches high, and the listing names Predator 9500, 9000, 8750, 8000, 7250, and 6500 models. The 600D waterproof fabric helps against rain, dust, and sun in outdoor storage. It will feel baggy on a 3500, so measure first. For a big Predator, that roomy, named fit is the point. See the 6500-watt generator covers guide if your model sits near that size.
- Named fit for Predator 9500 to 6500
- 600D waterproof fabric, 32 inch size
- Covers 5000 to 10000 watt range
- Baggy on smaller Predator 3500 units
- Storage only, check manual first
4.6/5
4.8/5
4.7/5
PREDATOR Generator Storage Cover, Medium — Middle size for 5000 watts
Best for: Predator generators up to 5000 watts
Predator owners with a 5000-watt inverter need a middle size, not a large cover that pools water or a small cover that strains, and this Harbor Freight medium cover fills that gap. Its listed size is 25 inches long, 19 inches wide, and 19.5 inches high, for generators up to 5000 watts. The weather-resistant exterior and locking drawstring help it stay in place in storage and transport. It is storage-only, so let the generator cool before covering it. For a Predator 5000, that middle fit is the practical choice.
- Middle size, 25 by 19 by 19.5 inches
- Direct Harbor Freight Predator fit
- Locking drawstring, weather-resistant exterior
- Too small for Predator 6500 and larger
- Storage-only, not for running use
4.8/5
4.6/5
4.7/5
NGB Generator Running Cover for Predator 5000 — Wet-weather running design
Best for: Running use on Predator 5000 inverter generators
Most storage covers must come off before a generator runs, but this NGB running cover is made for wet-weather use on inverter generators, including the Predator 5000. Its listed size is about 24.8 inches long, 20.2 inches wide, and 20.8 inches high, with a double layer of 600D plus 210D fabric and a waterproof top for refueling. That design aims to keep rain off while leaving airflow and access. Check the manual for your model before running under any cover. For storm use, that running design is the key difference.
- Double layer, 600D plus 210D fabric
- Waterproof top for refueling access
- Designed for running in rain
- Must check manual before running use
- Narrow fit range, measure carefully
4.5/5
4.7/5
4.6/5
D&ONEHOS Waterproof Universal Generator Cover for Predator 3500 4375 — Low-cost 3500 cover
Best for: Budget Predator 3500 and 4375 storage
Budget buyers still need a cover that fits the Predator 3500 without sagging, and this D&ONEHOS universal cover is sized for that same 3500 to 4500 watt range. Its listed size is 24 inches long, 18 inches wide, and 20 inches high, with heavy duty 600D Oxford cloth and a PVC coating for rain and UV protection. The elastic hem cord helps hold it tight in wind. It is a storage cover, not a running cover, so let the generator cool first. For a low-cost 3500 or 4375 cover, that simple fit is the appeal.
- Same 24 by 18 by 20 inch fit
- 600D Oxford cloth, PVC coating
- Elastic hem cord holds in wind
- Storage only, not for running
- Universal fit, less tailored than Adamoss
4.7/5
4.5/5
4.6/5
Joramoy Generator Cover for Predator 3500 — Simple everyday storage
Best for: Everyday Predator 3500 storage
Joramoy is another 24 by 18 by 20 inch option for the Predator 3500, and it suits owners who want a straightforward storage cover without extra bulk. Its listed material is heavy duty 600D Oxford fabric with a PVC coating, and the high fitted elastic cord around the bottom helps keep it wrapped tight. The listing names Predator 3500 and Harbor Freight Predator 4375, plus similar 3500 to 4500 watt inverters. It is storage-only, so do not use it while running. For everyday garage or shed storage, that simple, snug design is enough.
- 600D Oxford fabric, PVC coating
- Fitted elastic cord, snug bottom
- Names Predator 3500 and 4375
- Storage only, not for running
- Very similar to other 24 inch covers
4.6/5
4.4/5
4.5/5
Rosefray Generator Cover for Predator 3000-5000W — Larger middle fit
Best for: Predator 3000-5000W generators in wind
Rosefray covers the middle Predator range with a slightly larger footprint, which helps when wheels and handles make a 24-inch cover feel tight. Its listed size is 25 inches long, 24 inches wide, and 21 inches high, in 600D heavy duty waterproof fabric for 3000 to 5000 watt generators. The listing names Champion, Predator, WEN, Ryobi, Generac, and Westinghouse models in that range. A larger size can feel loose on a 3500, so check your measurements. For a 4000 or 5000 watt Predator, that extra room is useful.
- Larger 25 by 24 by 21 inch size
- 600D heavy duty waterproof fabric
- Fits 3000 to 5000 watt range
- Loose on smaller Predator 3500 units
- Storage only, check manual first
4.5/5
4.5/5
4.4/5
WLEAFJ Generator Cover for Predator 5000-10000W — Versatile large storage
Best for: Large universal Predator storage
WLEAFJ is a large universal cover for owners who move between Predator models or share one cover across a 5000 to 10000 watt generator. Its listed size is 32 inches long, 24 inches wide, and 24 inches high, with a UV-stabilized coating and a large pocket for small items. The listing notes compatibility with Predator, Westinghouse, Honda, and Champion models in that range. It will be baggy on a small inverter, so it suits larger frames best. For a big, shared storage cover, that versatility is the main benefit.
- Large 32 by 24 by 24 inch size
- UV-stabilized coating, large pocket
- Fits 5000 to 10000 watt range
- Baggy on smaller Predator inverters
- Universal fit, less tailored than Predator covers
4.5/5
4.3/5
4.4/5
GCD Fits Harbor Freight Predator 3500 Generator Cover Custom Fit — Tailored 3500 cover
Best for: A tailored Predator 3500 fit
GCD makes a custom-fit tarpaulin cover specifically for the Harbor Freight Predator Inverter 3500, and that narrow focus is its main selling point. The listing describes a waterproof tarpaulin cover in black, weighing about 12 ounces, made to protect that one model from dust, debris, and rain. A custom fit can sit closer than a universal cover, which helps in tight garage storage. Tarpaulin is lighter than 600D fabric, so it may wear sooner outdoors. For a 3500 owner who wants a tailored fit, that specificity is the reason to pick it.
- Custom fit for Predator 3500 only
- Waterproof tarpaulin, about 12 ounces
- Close fit for tight garage storage
- Lighter than 600D fabric covers
- Fits only Predator 3500, no larger models
4.4/5
4.2/5
4.3/5
Top 3 Head-to-Head: PREDATOR Large vs Adamoss vs Zettum
These three cover the most common Predator sizes: large open-frame, 3500 inverter, and large universal. Pick by your model size first, not by brand alone.
| Feature | #1 PREDATOR Large | #2 Adamoss | #3 Zettum |
|---|---|---|---|
| Value for Money | 4.8/5 | 4.9/5 — Best | 4.6/5 |
| Durability | 4.9/5 — Best | 4.7/5 | 4.8/5 |
| Ease of Use | 4.9/5 — Best | 4.8/5 | 4.7/5 |
| Choose if… | You own a Predator over 6500 watts | You own a Predator 3500 or 4375 | You want a large universal cover |
Who These Predator Covers Are NOT For
These covers are storage covers first, and they will not suit every Predator owner.
If you own a Predator 13000 or another very large model, measure before you buy. None of the covers here is listed for that size. If you store your generator indoors in a dry garage, a lighter cover may be enough.
Common Mistakes to Avoid
Most Predator cover problems come from size, heat, or wind, not from the brand name.
Frequently Asked Questions About Predator Generator Covers
What size cover fits a Predator 3500?
A 24 by 18 by 20 inch cover fits most Predator 3500 and 4375 closed-frame inverters. That size is listed for Adamoss, D&ONEHOS, and Joramoy covers in this guide. Measure your generator with handles included before you buy, because a cover that is too short will pull at the corners. If your 3500 has added accessories, measure again.
What size cover fits a Predator 6500 or 9500?
Use a 32 by 24 by 24 inch cover for most Predator 6500, 8750, and 9500 models, or the Harbor Freight large cover at 33 by 24 by 28 inches. Both sizes allow room for wheels, handles, and the larger frame. Check the listing for your exact model name, not watts alone. A 32-inch universal cover is usually the safer choice for larger open-frame Predators.
Can you cover a Predator generator while it is running?
No, do not cover a Predator generator with a storage cover while it is running. Predator manuals state: do not cover the generator or its engine during operation. A storage cover can trap heat and exhaust, creating fire and carbon monoxide risks. Only a purpose-made running cover with ventilation, panel access, and refueling access should be used while running, and only if your manual allows it.
Are Predator generator covers waterproof?
Most covers in this guide use waterproof or water-resistant 600D fabric with a PU or PVC coating, so they shed rain in storage. No fabric cover is fully waterproof forever, and seams can leak in heavy, wind-driven rain. A cover with a waterproof top and a snug drawstring will stay drier than a loose cover. Store the generator under cover, not in standing water.
How do I keep a generator cover from blowing off?
Choose a cover that matches your Predator size closely, then pull the drawstring, elastic hem, or buckle tight at the base. A cover that is too large will flap and lift in wind, even with a drawstring. Store the generator in a sheltered spot when possible, and check the closure after storms. Replace a stretched elastic hem before it stops holding.
Do Predator covers fit other generator brands?
Yes, many Predator covers are universal by size, not by brand alone. A 24 by 18 by 20 inch cover that fits a Predator 3500 also fits similar Westinghouse, WEN, Champion, and Honda inverters of the same size. A 32-inch cover fits larger models across brands too. Always compare length, width, and height, because watts alone do not guarantee fit.
Our Final Verdict
Predator covers are mostly a fit decision. The large Harbor Freight cover leads for 6500 watts and up, the Adamoss cover leads for a 3500 or 4375, and the Zettum cover leads for a big universal fit. Measure first, choose storage or running use, and do not cover a hot generator.
Hi, I’m Michael Turner. I own a generator workshop in the United States and founded HomeGeneratorBlog to share practical, hands-on guidance about generator installation, maintenance, troubleshooting, safety, and backup power solutions. My goal is to help homeowners make smarter, more confident decisions through clear and reliable information
