GENMAX 15000W Tri-Fuel Portable Generator - 2025 Model with ATS, CO Sensor, Digital Display & 50A Output Perfect for Home Backup, Construction Sites & Emergency Power

This generator is perfect for my needs! I was looking at the larger 240 volt inverter generators on the market to power my house during extended power outages. I decided this GENMAX GM9000iED has the most features for the best price compared to any of the other similar generators in this category. For example, if you compare this GENMAX 9000 iED generator to the Predator 9500 watt inverter generator offered by Harbor Freight: The GENMAX has a full digital multi meter showing power usage, the Predator only has an hour meter. The GENMAX has remote start, the Predator does not. The GENMAX has an engine oil filter screen, the Predator does not. (as far as I know, none of the GENAMX competitors have any form of engine oil filtration) The GENMAX is dual fuel compatible (gasoline and propane), the Predator is only setup to burn gasoline. The GENMAX has a 50 amp receptacle built in so no adapters are needed when plugging into large RVs, The Predator does not have this. (And I don’t believe any of the other 9000 watt inverter generators on the market have it, either… at least at the time of this review) When you compare the full asking price of the GENMAX vs the full asking price of the Predator, they are the same price. (at the time of this writing, Sept 2022) The GENMAX has a bunch more features for the exact same price as the Predator. I realize either one of these generators can be on sale at any given time but for conversation sake I am comparing full price vs full price to make it fair and even. I purchased my generator through Amazon and the home delivery company who delivered my generator did a great job. Because the generator is heavier than what the typical Amazon Prime delivery truck can handle, they ship the generator as “freight” to a local home delivery company in your area. That delivery company called me on a Friday afternoon. (My deliver was scheduled for the following Wednesday) The lady who called wanted to setup a time for the delivery. She asked if they could deliver it on the following Monday, but that didn’t work for me. We eventually settled on that Tuesday, which was one day earlier than was originally scheduled through Amazon when I originally placed the order. On that next Monday the home delivery company sent me an automated text to remind me of the Tuesday delivery, and to give me a timeframe when the truck would be at my house. On Tuesday my phone beeped with a text from the truck driver letting me know he would be at my house in 20 minutes. (This was right in the middle of the window of time they gave me the day before) Exactly 20 minutes after that text, the truck rolled up on the street in front of my house. Two guys unloaded the generator off the truck and rolled it up my driveway on a furniture moving cart and rolled it right into my open garage stall. The outer shipping carton (cardboard box) on the generator had a small puncture in the side from the tip of a forklift fork. I asked the delivery guys to stick around for a few minutes so I could insect the item before signing for it and officially accepting the delivery. They gladly waiting for me to unbox the generator and look for damage. I quickly discovered these generators are shipped in TWO thick cardboard cartons (not just one) and my inner cardboard carton was flawless and so was the generator itself. I signed for the delivery and the two guys said thank you and drove off onto their next delivery. It was a very easy and painless process. I would say between Amazon, and my local home delivery company, they have this oversized/overweight home delivery/scheduling perfected. It went very smoothly! I took both side panels off the generator and filled the engine with oil on one side, and connected the electric start battery on the other side, I then reinstalled both side panels and lastly I poured about a gallon of non-ethanol gas in to the gas tank and the generator was ready to start. On brand new engines I like to slowly pull the rope cord to move oil throughout the engine before hitting the electric start button, which is exactly what I did. Once I pulled the rope 3 or 4 times, I turned on the main power switch and hit the big round start button. I started right up and ran perfectly! I am still in the process of breaking in the generator so I haven’t completely loaded it down yet but I have been varying the load with two small electric heaters, and I’ve also been varying the engine speed by turning the low idle switch on or off every 5 or 10 minutes. I have also made sure that it will run pretty much anything in my house. I recently installed a power “inlet box” on my house along with a generator interlock device on my main panel. (Everything inspected and passed) My house is not very big and every light bulb is LED. I flipped the light switch on in every room along with my TV and refrigerator running, internet modem, router, desktop computer, driveway flood light etc…. and it was still able to kick my central AC unit on…. And I don’t even have an easy start kit installed. VERY impressive! The generator runs like a Swiss watch and is very quiet, especially for its size. I have it positioned in such a spot where I cannot hear it running in my house. This thing is the best product that I’ve purchased in a long time. I absolutely love knowing that I have a large enough generator to run pretty much my entire house during extended power outages, and it’s quiet enough that I won’t have to lose my mind listening to it run 24 hours a day during outages, AND it’s an inverter generator so it constantly puts out exactly 60 hertz at roughly 120 volts. Even with my home AC running along with a bunch of lights and appliances, this generator was still running at exactly 60 hertz and the voltage maintained right around 120. Perfect! I believe this is the best inverter generator with the most features that you can buy right now. If you’re looking for a generator like this for either camping or home backup, this is the one!

I probably did not need this much power other than to start my large air compressor or to use while welding with a Miller 252 welder but this unit had some features I was looking for. I did a lot or research to come up with this unit. An inverter generator is a nice item to have to power smaller loads but to power large inrush items you need a good surge generator as to why I went this route. I notices the Harbor Freight model on sale, a 13000w on sale for a little over a grand and in review the sign wave became trashy after 7500w so that was off the burner. Started looking over many units to find even champion was made in china. Yes most all portable gens are made over seas or put together here with china parts. This gen came with remote key fob /electric start / pull start / and 2-wire start control. A very use full way with solar inverters or other equipment. This tri-fuel unit give many options. Came with all the hoses/charged sealed batter/wheel kit/ grab handles/ tools /oil/ charger and more than you would expect. Amazon was quick to get it to me. The frame is larger than most being 1 1/4 inch thick. The rails above the tank are welded on instead of bolted like some of the other models. I could not find a scratch on mine. Ever thing about it well built and thought out. Even the wire harness going to the control panel was taped or rubber covered to keep water out and protect the wires. I like the style of the read out being easy to see with the lighting as well as the night time led lighting above the display of controls. I added the oil, hooked on my grill propane tank and it started right up on the first try, impressed.. I hope this unit lasts a long time. For thous interested in knowing, when you down load the manual, the web site has a statement. Starting this year, any one who buys a Genmax will now receiver a 3 year warranty. This started Jan. 01, 2026 for any one buying on this date and after. Glad I waited till this year to buy one. Here is some pictures of my unit. Looking at some of the pics, you can see they provided a cover for the unit, who does that? the handles have rubber inserts to grab and keep the handles from scratching the frame as well in aid for good grip when moving. Has a nice muffler and when it was running I was amassed it really was not as loud as I thought it would be being a large 520cc engine. I'm hoping for the best but just to say it looks like a nice unit to have. this one has the 50 amp RV plug which I need for the welder, so I'm all set with that. I will be able to use the 2 wire start to hook to my solar inverter or to add another way to start automatically from another location.