The generator box you leave outside.
A heavy-gauge aluminum enclosure for your portable generator. Bolt it to your pad once, lift the hinged lid to refuel, fold out the side air windows and run. It won’t rust, blow away or sag under snow, and it locks with a padlock.
- .080" aluminum
- White textured powder coat
- 42" × 33" × 30" · 85 lbs
- Padlock-lockable
- $150 flat-rate FedEx
- Fits up to ~12,000W
Everything a generator enclosure should be
Tarps tear, tents get tossed around in storms, and steel boxes start rusting at the seams. We build The Generator Box from aluminum so it can sit outside all year.
Heavy .080" aluminum
Thick aluminum plate holds its shape and doesn’t dent easily. It’s much lighter than a steel box of the same size.
White textured powder coat
A tough textured powder coat over aluminum that will never rust, so it lasts even longer outdoors. Want it to match your trim? Custom colors are quoted separately.
Hinged lid for fuel access
The hinged lid swings up so you can refuel and reach the controls where the generator sits. You don’t have to pull the generator out.
Fold-out side air windows
Louvered side panels fold out to open the box for ventilation and cooling while the generator runs. Keep them open whenever it’s on.
4-point lag-down base
Four mounting holes at the base let you lag it into a concrete pad or pavers. Wind can’t move it, and it’s hard to walk off with.
Locks with a padlock
The latch takes a standard padlock (not included) to keep the lid closed and the generator secure. Pair it with the bolt-down base and it isn’t going anywhere.
Steel rusts. Vinyl tears. Aluminum lasts.
Most metal generator enclosures are galvanized steel. Once the coating gets scratched at a cut edge, fastener or hinge, rust starts spreading. Aluminum doesn’t rust, so a scratch stays a scratch. At 85 lbs, it’s also light enough for two people to carry to the pad.
- Stays outside all year with the generator inside
- Keeps rain, snow, leaves and critters off the generator
- Sits on the pad ready to run when the power goes out
- Clean, low-profile look next to the house
| Generator Box | Steel box | Vinyl tent | Plastic shed | |
|---|---|---|---|---|
| Rust-proof | Yes | Coating only | Yes | Yes |
| Outside year-round | Yes | Yes | No | Varies |
| Bolts to the pad | Yes | Usually | No | Some |
| Snow load / impact | Strong | Strong | Weak | Fair |
| Weight to move | Light | Heavy | Light | Light |
Looks clean next to any house
A crisp white box on a small paver pad. It fits in with vinyl siding, brick, board-and-batten or cedar shake.
Generator Box specs
Check the length, width and height of your generator, including handles, wheels and any wheel kit, before you order. If you aren’t sure it fits, call or send us the model number and we’ll check it.
| Material | .080" thick aluminum |
|---|---|
| Finish | White textured powder coat (custom colors quoted separately) |
| Outside dimensions | 42" W × 33" D × 30" H |
| Weight | 85 lbs |
| Generator capacity | Most portable generators up to ~12,000W (see fit guide) |
| Fuel access | Hinged lid |
| Ventilation | Fold-out louvered side air windows (must be open while running) |
| Security | Locks with a padlock (not included) + bolt-down base |
| Mounting | 4 base holes to lag into concrete or pavers |
| Made in | Oxford, Connecticut, USA |
| Arrival guarantee | Arrives damaged? We replace it with a new one. |
| Shipping | $150 flat rate via FedEx |
| Price | $1,195 + $150 shipping |
Generator fit guide
The Generator Box holds most portable generators up to about 12,000 watts. Here are some real-world examples. Dimensions are approximate, so always measure your own generator, including handles and the wheel kit.
| Generator class | Example model | Approx. size | Fit |
|---|---|---|---|
| Medium inverter (3,000–5,000W) | Westinghouse iGen5000 | 24.5" L × 17.5" W × 20" H | Fits with room to spare |
| Large inverter (7,000–9,500W) | Predator 9500 | 31" L × 23.75" W × 28.87" H | Fits (about 1" clearance on top) |
| Open-frame (7,000W running / 9,000W starting) | Champion 9000W (shown in our photos) | Open frame with wheel kit | Fits |
| Large open-frame (7,500–12,000W) | DuroMax XP12000EH | 40" L × 29" W × 27.5" H (with wheel kit) | Squeezes in — very tight fit |
Outside dimensions: 42″ W × 33″ D × 30″ H. Not sure? Send us your model or call (203) 267-1000.
Set it up in an afternoon
Pick & prep the spot
Choose a level concrete pad or paver base outdoors, well away from doors, windows and vents, with the exhaust pointed away from the house.
Lag it down
Set the box on the pad and drive masonry lag bolts through the four base holes. From then on it stays put.
Open up & run
When the power goes out, open the side air windows, lift the lid to check fuel, and start the generator.
Carbon monoxide safety comes first
Only run a portable generator outdoors, never in a garage, basement or shed attached to your home. The U.S. CPSC recommends placing it at least 20 feet from the house with the exhaust pointed away from windows and doors. Always open the side air windows before starting, and keep working CO alarms inside your home. Read our generator safety guide.
Know before you buy
Generator enclosure questions
The Generator Box measures 42″ wide × 33″ deep × 30″ tall on the outside. The usable space inside is slightly smaller, so measure your generator’s full length, width and height, including handles, wheels and fuel cap, and leave room around it for airflow. It holds most portable generators up to about 12,000 watts. For example, a Westinghouse iGen5000 (about 24.5″ × 17.5″ × 20″) fits with room to spare, a Predator 9500 inverter (about 31″ × 23.75″ × 28.87″) fits with roughly an inch of clearance on top, and a DuroMax XP12000EH with its wheel kit (about 40″ × 29″ × 27.5″) squeezes in as a very tight fit. If you’re not sure, call (203) 267-1000 or send us your generator’s make and model and we’ll check the fit before you order.
Yes. That’s what the fold-out side air windows are for, and they must be open whenever the generator is running. Keep the enclosure outdoors, well away from doors, windows and vents, with the exhaust pointed away from the house. Follow your generator manufacturer’s instructions and keep working carbon monoxide alarms inside your home.
No. Aluminum doesn’t rust the way steel does. The Generator Box is built from .080″ aluminum with a white textured powder coat, so it holds up to rain, snow and road salt year after year. Galvanized steel enclosures rely on their coating, and once it’s scratched or cut the steel underneath can rust.
The Generator Box is $1,195 plus a flat $150 for FedEx delivery anywhere in the continental U.S. The box weighs 85 lbs.
Yes. The lid latch takes a standard padlock (padlock not included). The base also has four mounting holes, so you can lag it into a concrete pad or pavers. Once it’s locked and bolted down, wind can’t move it and it’s much harder to steal.
Lift the hinged lid. It gives you access to fill the tank where the generator sits. Always shut the generator off and let it cool before refueling.
Bolt it down once. Stop dragging the generator out.
$1,195 + $150 flat-rate FedEx shipping · Questions? Call (203) 267-1000
A rust-proof aluminum portable generator enclosure you bolt down once and leave outside for good. Designed and fabricated by Microfab Company in Oxford, Connecticut.
Guides
Contact
- (203) 267-1000
- microfab@optonline.net
- 339 Christian Street, Oxford, CT 06478
- Mon–Fri 7AM–5PM · Sat 7AM–12PM · Sun by appointment