I have yet to use this generator in anger but I have run it once a month for 1/2 hour to test my whole house backup system for the last several months. I run 240 volts from the 50 amp plug to a 50 amp whole house interlock. When I got it, I ran it from a 100# propane can and it ran well on that. I have just installed a 3/4" NG QD on the side of my house (which a certified plumber hooked up and tested) and ran the generator this month on NG. I plan to use the propane can as a backup fuel source going forward. I have not tested the generator with gasoline yet. It starts right up from the propane but takes a bit to start from the NG line as I suspect it needs to purge more air from that line as it is larger (3/4" with 1/2" adapter) and longer (20 ft.). I was able to run my home's 3 ton AC unit (with soft start) this summer with this generator. About the highest steady load I have seen on it with NG so far is 5700 Watts. I had low idle On and the lights momentarily dimmed when my 4000 Watt water heater kicked on but the generator responded quickly and automatically bumped up the RPM to meet the demand.

Received on Feb11,2025. Was a little disappointed it came with no pallet because it traveled a long way. Upon opening the box they use sheets of wood to protect the top and bottom of the unit. The unit feels well built and came with a lot of accessories and features. It is big and heavy but is manageable with the handles. Everything is labeled on where everything is. Checked and double checked the unit thoroughly. Read the manual twice, added oil and it started on second attempt on Natural Gas, and will only be used to run on NG. This thing is really quiet and only have 15min runtime so I can not say on the longevity but hope it lasts for years with proper care and maintenance.

Wow! Genmax Nailed on this one – The tri fuel option is a must these days and I will never get a generator without out it. I did some shopping around and this was the only big wattage unit that came in an enclosed inverter while providing me with the running wattage that I needed to power my house. Ordered this unit back in June and the unit arrived at my house less than 3 days later- and the white glove service was impeccable. The guys unloaded the unit for me and dropped it off exactly where I needed it to go which was sweet, I was a little worried about maneuvering this beast but once it arrived the heavy duty handle bars and wheel system make it super easy to move around, youre carrying less than a quarter of the weight. I was looking at the Westinghouse unit which was a few hundred dollars more but was an open unit. The fact that I can keep this unit running outside indefinitely while having it connected to my natural gas line and have people over in my backyard without being disturbed was shocking to me.. the noise level is so low you barely notice it in the background. I also have been in talks with their support team about getting this unit connected with a transfer switch which I will be doing soon – Oscar and the genmax support team were awesome with answering all of my questions and getting back to me with emails – very happy with my purchase after 2 months of owning

Only run for one hour break in so far but seems nice and is quiet. Only issue so far is when researching this before buying, the manual stated it was a floating neutral generator with an included bonding plug which is what I wanted for connection to my house as backup power. However, when it arrived it is a bonded neutral and there is no information on the Genmax FAQ page that the manual points you to on where the neutral to ground bond is that you need to remove. Genmax service also still thinks this model is neutral floating by default and I had to send them a picture of my front panel to show them that it said Neutral Bonded. They did not have any updated instructions for this model either.

This is a great generator. Bought as a home backup because Edison is replacing poles and power is shut off frequently up to 8 hours. I have a 10 circuit transfer switch and it powers our whole house except hot water heater which it would but no required. It rarely kicks up to full power. I replaced an open frame generator with this because of noise issue. The Genmax is very quiet..

Got this beauty just in time for hurricane Helen

best purchase in a while, well designed and made machine

Love this generator. We can run this generator to our service panel with a lockout switch and it can practically run the whole house (except AC and stove).

This generator claims to have 6500 W running and 8500 W start but the generator I just replaced it with had 2900 running 3200 starting but was as powerful as this one. Also, the generator has shut itself off two nights in a row when I was sleeping.

Comes with everything you need to setup except an 8mm socket to take the sides off to add the oil and connect the battery. Oil, hoses and connections all included.