Best generator covers for backup power – all‑weather protection
Start with fit, material, and use-case. A good generator enclosure cover should match your unit’s length, width, and height; use durable, waterproof fabric; and suit storage or running needs. For backup power setups, look for reinforced seams, UV resistance, and secure tie-downs that won’t flap in wind. If you need weather protection while running, choose a purpose-built running canopy; for storage, a full-coverage generator cover keeps dust and rain off between uses.
Generated 8/27/2025
Recommendation
The Arlmont & Co. Heavy Duty Waterproof All Weather Protection Universal Portable Generator Cover is an excellent match for protecting your generator in various weather conditions. With its universal fit, it's designed to securely cover a range of generator models, ensuring your equipment remains dry and protected from the elements. One of the standout features of this cover is its heavy-duty construction, which promises durability and longevity. Made from high-quality waterproof materials, it provides reliable protection against rain, snow, dust, and sun. The design caters to universal use, making it versatile for most portable generators. The product's user rating is 5 stars, based on 4 reviews, which speaks to its quality and customer satisfaction. With a competitive price of $45.99, it offers good value for money for those looking to invest in protecting their generator. This cover is priced well within an affordable range, ensuring cost efficiency while not compromising on quality. If you are shopping on a budget, this item is a prudent choice given its robust protection compared to more expensive options. Things to consider: Ensure that your generator measures within the cover's dimensions to guarantee a snug fit. Also, while the waterproof material is meant to withstand various weather conditions, allowing the cover to dry out completely between uses will maintain its durability. As always, check the fit and closure to prevent any wind damage or moisture ingress.
Recommendation criteria
The recommendation is based on these requirements:
Our recommendation – Arlmont & Co. Heavy Duty Waterproof All Weather Protection Universal Portable Generator Cover
This universal portable generator cover offers straightforward, all‑weather protection for storage and transport. Its full‑coverage design helps keep rain, dust, and UV off the frame and outlets, and the universal fit suits many popular sizes—measure your Generac before buying to confirm length, width, and height. It’s simple to put on and remove, folds down neatly when not in use, and costs far less than specialized canopies, leaving room in your budget for fuel, cords, or a maintenance kit.
- Universal sizing works with many portable generators, including common Generac dimensions (confirm measurements)
- All‑weather, waterproof exterior for off‑duty protection from rain, dust, and sun
- Easy on/off design that stores compactly between outages
- Excellent price for everyday storage protection
Other products analyzed at the time
Waterproof Universal Generator Cover
$26.13 - eBay - nder16
(1 reviews)Budget alternativeOur evaluationLow-costWaterproof Universal Generator Cover – Basic, affordable storage coverageSimple universal cover suited to indoor or sheltered storage. Good for keeping debris off between uses without adding bulk.
Westinghouse Portable Generator Cover
$20.13 - Home Depot
(2800 reviews)PremiumOur evaluationBrand-fitWestinghouse Portable Generator Cover – Tailored storage fit for Westinghouse unitsBrand‑specific cover with a neater silhouette and reinforced panels around common contact points. Measure your model to ensure the listed size aligns.
Champion 4800-11,500W Portable Generator Cover
$25.13 - Grainger Industrial Supply
(490 reviews)Our evaluationCompactChampion 4800-11,500W Portable Generator Cover – Sized for popular Champion framesCompact storage cover with openings positioned for typical Champion handles and frames. Best for off‑duty protection, not for running use.
GenTent Generator Running Cover Universal Kit
$159.99 - GenTent Safety Canopies
(201 reviews)Our evaluationRunning useGenTent Generator Running Cover Universal Kit – Operate safely in wet weatherA running canopy with a rigid frame that diverts rain while allowing airflow and access to controls. Choose for outdoor operation during storms; not intended as a storage dust cover.
FAQ
What should I look for in a generator cover for backup power?
Match the cover to your generator’s dimensions (length, width, height) with a little clearance for handles and cords. Choose waterproof, UV‑resistant fabric with reinforced seams and secure tie‑downs. Decide on storage versus running use: storage covers provide full protection when the engine is off, while running canopies shield from precipitation and maintain airflow when operating. Finally, check that control panels and carry points remain accessible.
How much should I spend, and what represents good value?
For storage covers, expect a reasonable price for durable fabric, taped or well‑finished seams, and reliable fastening. Spending more brings thicker materials and better fit. Running canopies cost more due to their frames and safety features; pay up if you’ll operate in rain or snow. Value comes from fit and durability—measure carefully, avoid overpaying for features you won’t use, and prioritize weather protection that matches your routine.
Will a cover fit my Generac, and can I use it while the generator is running?
Most universal storage covers fit many Generac portable models if you match size correctly. Measure your unit and compare to the cover’s stated dimensions. Storage covers are for off‑duty protection only—remove before starting. If you must run in wet weather, use a purpose‑built running canopy such as the GenTent style that maintains airflow and keeps outlets and exhaust clear.
How do I care for and store a generator cover to make it last?
Let the generator cool completely before covering. Rinse off mud or salt with fresh water, then hand‑wash with mild soap; avoid harsh solvents. Air‑dry fully before folding. Store the cover in a dry, shaded place away from sharp edges, and avoid prolonged UV exposure when not needed. Periodically inspect for abrasion points and retighten straps or cords to prevent flapping that accelerates wear.
When should I choose a fabric cover instead of a rigid enclosure or shed?
Choose a fabric storage cover if you need lightweight, portable protection between uses or during transport. Pick a rigid enclosure or small outdoor shed when you want year‑round placement, better impact resistance, and noise reduction. If operation during storms is required, a running canopy is the safer choice because it preserves airflow and keeps electrical panels dry. Match the solution to how and where you use the generator.
How do I prevent condensation or mildew under a generator cover?
Always cool the engine fully before covering to avoid trapping warm, moist air. Wipe off visible moisture, then cover in a dry environment. Prefer breathable fabrics or slight ventilation at the base to allow moisture to escape. Store the generator on a raised, dry surface, and consider a desiccant pack nearby in humid climates. If condensation appears, remove the cover to air‑dry both surfaces before reuse.
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