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If you own a portable or standby generator, you probably already know the core unit is just the beginning. Accessories turn a bulky power machine into a safe, convenient, and reliable backup system for your home. Think of accessories like the socks and shoelaces for your generator — they keep everything together, comfortable, and working when you need it most. In this guide I’ll walk you through the most useful add-ons, where to find them in the US, and how to pick the right items so you don’t end up buying gear you’ll never use.
Generators need a small ecosystem of parts to perform well and safely. From inlet boxes and heavy-duty cords to grounding rods and fuel stabilizers, each category plays a role. I’ll break down these categories and explain what matters so you can shop smarter and protect your home and family during an outage.
Want to power your home circuits without running extension cords through windows? A power inlet box mounted outside your home plus a manual or automatic transfer switch inside will let you connect the generator to your home’s electrical panel safely. Manual transfer switches are usually simpler and less expensive, while automatic options can toggle loads without you lifting a finger. Make sure the inlet and switch amperage match your generator — common sizes are 30-amp and 50-amp — and that installation follows local electrical codes.
Not all extension cords are created equal. For generator use you need thick-gauge, three-prong or four-prong cords rated for outdoor use and load capacity. Popular lengths are 25 feet and 50 feet so you can stash the unit away from your home for safety. Look for cords labeled for generators with grounded plugs and a gauge like 10/3 or 6/3 depending on the current. Cord reels and hooks help prevent kinks and tripping hazards when you store cords between uses.
Fuel stabilizer and proper storage containers will save headaches when you keep gasoline on hand for shorter power outages. A small generator may burn a gallon every few hours, so using approved 5-gallon safety cans and a stabilizer that keeps gasoline fresh for months helps avoid clogged carburetors. Also consider a fuel transfer pump for filling the generator without spills and an oil funnel and measured filters to make routine oil changes faster.
Many portable generators use a battery for the electric start feature. Keeping that battery topped up with a smart battery charger during the offseason preserves starter life. For convenience, a compact jump starter pack is handy if you ever need to start the generator manually or help a car in a pinch. Look for chargers with built-in desulfation or maintenance modes so a battery left unused doesn’t fail when you need it most.
If your generator is heavier than about 100 pounds it pays to get a wheel kit or a proper dolly. Wheel kits reduce strain and make seasonal moves from the garage to the yard much quicker. For standby units, vibration isolators, rubber mounts, and permanent pads help reduce noise and protect the generator from settling or rocking during operation.
Carbon monoxide is the number one hazard with generators. A reliable CO detector designed for garages or large spaces should be placed near living areas and a safe distance from the generator. Proper grounding rods and clamps are also essential to reduce electrical hazards and protect electronics. Don’t skip grounding because it feels like an extra chore — it can prevent dangerous backfeed and protect the people in your home.
Shopping for generator accessories? You’ve got local big-box options and specialized online retailers. I’ll highlight stores where you’ll find a mix of price, selection, and convenience so you can decide where to buy each item on your list.
Walmart is a strong choice for budget-friendly, everyday generator accessories. You’ll find extension cords, inlet boxes, fuel cans, and smaller items like stabilizers and battery chargers. Walmart often carries seasonal or household-focused brands and is a good stop for items like the Samyohome single burner with adjustable regulator — handy if you need a temporary cooking solution during extended outages. If you value convenience and low prices, Walmart is worth checking first.
The Home Depot offers a wider selection of more heavy-duty generator accessories and the staff are usually knowledgeable about installation basics. Expect to find transfer switches, power inlet kits, heavy-gauge cords in 25-foot and 50-foot lengths, grounding rods, and wheel kits for bigger units. Home Depot also stocks professional-grade parts from brands known in the construction and electrical trades, so it’s a reliable place for higher-quality components.
Lowe’s competes closely with Home Depot on selection and service. It’s a strong bet for inlet boxes, transfer switches, and installation equipment. Lowe’s sometimes bundles installation services if you prefer a pro to handle the electrical hookup. The store also carries seasonal generator accessories and maintenance kits, and you can often find online-only items available for in-store pickup.
Harbor Freight is where many DIYers go for tools, mounts, and lower-cost hardware. If you need mounting plates, wrenches, dolly parts, or a compact generator wheel kit, Harbor Freight’s prices are tough to beat. The trade-off is that some items are less refined than premium brands, so Harbor Freight is ideal for cost-conscious buyers and homeowners who are comfortable doing the work themselves.
Northern Tool serves contractors and serious hobbyists. You’ll find industrial-grade extension cords, professional inlet solutions, and rugged storage cases. They also carry higher-capacity fuel tanks and more specialized accessories designed to withstand regular heavy use. If your generator duty is frequent or you need accessories that handle tougher jobs, Northern Tool is a top pick.
Amazon has the deepest selection and fast shipping for most generator accessories, including niche items and specific brands. You can compare customer reviews, browse a wide price range, and find parts like smart battery maintainers, unique cord adapters, and less common inlet configurations. Specialized online retailers and manufacturer sites are also great if you need OEM parts for your specific generator model or prefer full warranties directly from the maker.
Choosing the correct accessories isn’t just about picking the fanciest item on the shelf. Match the accessory to your generator capacity, the loads you plan to run, and how you intend to use the unit. Safety, compatibility, and ease of installation should drive your decisions.
A small portable inverter might only supply 1,000 to 3,000 watts, while larger units can deliver 5,000 to 10,000 watts or more. Know your generator’s continuous and peak watt ratings so you don’t overload cords or inlet boxes. Also factor in fuel type: gasoline, propane, and diesel each have different storage and transfer needs. For instance, a diesel generator owner will focus more on secure fuel tanks and filters, while a propane user needs proper hose fittings and regulators.
An accessory that saves time but violates local code is a false economy. Transfer switches often need a certified electrician to install to meet code and pass inspection. Grounding rods must be driven to the required depth, and inlet boxes must be weatherproof when mounted outdoors. When in doubt, consult a licensed electrician — it’s safer and often cheaper than paying for repairs after something goes wrong.
A careful installation and simple maintenance routine keep your generator ready when you need it. You don’t need to be an expert to perform basic checks, but regular attention pays off in reliability and longer equipment life.
Install the inlet box on the exterior wall near where you plan to run the cord from the generator. Use conduit to protect wiring if it runs exposed, and seal the box with weather-resistant caulk to keep water out. For cords, lay them so they don’t cross walkways and keep them off wet ground whenever possible. Always plug cords into the generator first, then the inlet, and reverse that when shutting down to avoid sparks.
Even if your generator only gets used a few times a year, regular maintenance is essential. Change oil after the first month of use and then every 50 to 100 hours of operation depending on the manufacturer. Check air filters, inspect spark plugs, and run the generator under load for 30 minutes every month so fuel systems stay clear. Keep a small maintenance kit with oil, a spare filter, stabilizer, and a few fuses so you’re ready for minor repairs.
You can cut costs on certain accessories but not on anything that impacts safety or electrical integrity. Think of this as a mix-and-match approach: buy cheaper everyday items where acceptable, and spend more on components that interface directly with your home’s electrical system.
Spend money on a high-quality transfer switch, a properly installed inlet box, and certified grounding equipment. Those parts protect your home and are often required by code. Skimp on gimmicks like novelty tools or unnecessarily large extension reels if you won’t use them. It’s better to have one reliable, code-compliant setup than several cheap items that create risk.
Buy accessories with clear warranty terms and good return policies (but don’t rely on returns for installation mistakes). Take advantage of price matching at big retailers and look for seasonal sales before storm season. For electrical parts, prioritizing items backed by manufacturer support ensures you can get replacement parts or help if something fails during a critical time.
Generator accessories may seem like small purchases compared to the cost of a generator, but they make the difference between a clumsy setup and a dependable backup power system. Focus on safety, compatibility, and quality for the parts that connect to your home or control load distribution. For cheaper consumables and everyday gear, big-box stores like Walmart, Home Depot, and Lowe’s offer convenience and value, while specialty outlets and online retailers provide depth and brand-specific parts. With a plan and a few smart purchases, you’ll be ready for outages with confidence — and maybe even a little peace of mind.
| Generator Accessories | Price | |
|---|---|---|
| Nature S Generator Rv 50a Automatic Transfer Switch | $ 299,99 | |
| Lennox 42w16- Genuine Oem Replacement Part | $ 368,75 |
