
4000W Gas Inverter Generator, Under 3% THD, 30A Outlet
Model GEN-4000W-INVERTER-30AInverter Generators
- Free tracked delivery3–5 business days after dispatch to most US addresses; 5–8 to Alaska, Hawaii and US territories.
- 30-day returnsUnused, in its packaging. Faulty or damaged on arrival, we pay the return; a change of mind, you do.
- Secure checkoutPayment is handled and encrypted by Shopify Checkout.
Overview
2-Year GridGuardPlus Warranty included. Every item we sell is backed by our two-year warranty. Questions? Call 1-800-680-4080.
This portable 4,000W gas inverter generator delivers clean power with under 3% THD and runs up to 14 hours at 25% load. It has a 30A outlet for heavier loads, and its portable roll-frame design makes it easy to move for camping, RV trips and home backup power.
A gas generator makes its own power from fuel, so it can run for as long as you keep it fueled, with no wall outlet needed. Always run it outdoors and well away from windows, doors and vents.
Key specs
- 4,000W gas-powered inverter generator
- Under 3% THD (total harmonic distortion) for cleaner power
- Up to 14 hours of run time at 25% load
- 30A outlet plus two 120V AC outlets
- 12V DC outlet
- ECO mode switch and overload indicator lights
- Portable roll-frame design, listed at about 56 lbs
Best for
- Camping and outdoors
- RV and travel
- Home backup power during an outage
- Powering tools and equipment away from an outlet
Good to know
Add up the wattage of everything you plan to power at the same time and keep it below the generator's output rating. Motors and compressors briefly draw more power when they start. A portable generator is not designed to run an entire home.
Who this is not for
Anyone who needs to power an entire home, central air conditioning or other heavy loads at once, or who needs to run power indoors or in an enclosed space.
Safety and care
- Run it outdoors only, at least 20 feet from the house, with the exhaust pointed away from windows and doors
- Never run a generator in a garage, shed or any enclosed space, even with the door open
- Let the engine cool before refueling, and store fuel in an approved container away from heat
- Check the oil level before each use and follow the manual for maintenance
Frequently asked questions
What can it run?
Add up the running watts of the items you want to power at the same time and keep the total below the generator's 4,000W rating.
Can I use it indoors?
No. Gas generators produce carbon monoxide and must only be used outdoors in open air.
What does under 3% THD mean?
THD measures how clean the power is. Lower is better, and under 3% is good for sensitive electronics such as phones and laptops.
Can I bring it on a plane?
No. Gas generators cannot be transported by air.
Buy with confidence from GridGuardPlus
- 2-year GridGuardPlus warranty on every item
- Free return pickup on bulky or heavy items
- Damage guarantee: if it arrives damaged we replace or refund it, with no photo-proof fight
- 30-day returns
- Real people on the phone: 1-800-680-4080, 875 Industrial Hwy, Unit 8, Cinnaminson, NJ 08077
Good to know
When will it arrive?
Orders placed before 2:00 pm ET on a business day ship the same day from Orlando; Saturday orders before 1:00 pm ET go out that afternoon. After that, it ships the next business day.
Delivery takes 3–5 business days after dispatch to most US addresses, and 5–8 to Alaska, Hawaii and US territories.
Can I return it?
Yes — tell us within 30 days of delivery and send it back unused, in its packaging, for a full refund. If it is faulty, damaged in transit or not as described, we pay the return; if you have changed your mind, the return shipping is yours, and we quote it before anything is booked.
How does Bundle & Save work?
Every item marked Bundle & Save counts (single items under $550), and you can mix them: 2 items save 5%, 3 save 10%, 5 or more save 15%. The saving is taken off automatically in the cart — there is no code to enter.
Do I need to be in for the delivery?
Orders over $150 ship with signature on delivery, so a missing parcel can be claimed. Your tracking number is emailed the moment the label prints.
