I have the Champion 9kW tri fuel inverter as I bought into the marketing hype of the cleaner power being better for sensitive electronics (no clue if this is actually true). It's been running my 3 ton upstairs AC (w/o soft start), a portable AC downstairs and everything else in the house on NG. Slightly cheaper than some of the other options and a 3 year warranty.

https://www.amazon.com/Champion-Power-Equipment-201176-9000-Watt/dp/B0C9KZCXBL/ref=pd_aw_ci_mcx_mh_mcx_views_0?pd_rd_w=YPWC6&content-id=amzn1.sym.b6f63020-40c7-426a-9c3f-c15ee0c5d228%3Aamzn1.symc.2b06b7e8-a86c-4e6e-b02c-90d58278f4f1&pf_rd_p=b6f63020-40c7-426a-9c3f-c15ee0c5d228&pf_rd_r=TAHRTSMQ3BJ6SX32Z4FK&pd_rd_wg=A32rC&pd_rd_r=2fffc74d-13b1-459f-bfd5-9279329dd989&pd_rd_i=B0C9KZCXBL

I have been waiting to post a writeup until my power came back on. Didn't want to jinx anything while things were still running on the generator. This post is a bit rambling so TLDR - Super pleased with my generator.

I bought the Westinghouse WGEN9500TFc tri-fuel generator about 2 weeks ago to get ready for hurricane season. Did not think I would be using it as quickly(or as long) as I did! We lost power around 6:00am on the 8th and got it back around 7:00pm on the 14th.

Here is the model I bought:
https://westinghouseoutdoorpower.com/products/wgen9500tfc-tri-fuel-with-co-sensor

Initial setup and prep:

At some point in the past my house had a hot tub so I already had a tee and valve at my gas meter and there was a empty 40-amp breaker located at the top right position of my breaker panel. This made it easy enough for me to install everything myself without and electrician or plumber. I swapped out the 40-amp for a 50-amp breaker, finished wiring up the inlet, and installed the interlock on Sunday before the storm. I installed a Microair soft start on my 5-ton AC unit 2-3 weeks ago which got my starting amps down to ~35.

Something to think about when getting things set up, the location of your electrical panel and natural gas connections. My power enters the house on the left side of a semi-detached garage. The natural gas meter is on the right side of my house. As a crow flies they are about 75' apart. I used about 30' of wire and conduit to install my generator inlet as close as possible in the direction of the gas meter. The factory 1/2" diameter natural gas hose that came with the generator is 20' long and I bought a 50' long 50amp extension cord. I had almost no slack to get them both connected and no options on where to place the generator except where they met in the middle. Better than nothing but having the generator running right off of the back patio non-stop is a noisy affair. The rumble was very noticeable in the living room and master bedroom.

Running the generator:

I ran the generator on NG for about an hour to break in for the first oil change on Sunday. Started up and ran perfectly. Oil changes were simple enough and I used an old citronella candle container that slid under the frame to catch oil as it came out the drain plug. Definitely want to find a reservoir that is small enough to fit under the frame so you aren't having to balance it on blocks or something to drain it. I wish I would have marked the bottle that came with the generator with the oil fill level. It uses 1.1 liters of oil and I pretty much had to slowly fill and measure with the dipstick constantly since I the bottle didn't have any markings showing how much 1.1L of oil was. I Ran it for about 4 hours on propane again before changing the oil a second time. Once the storm died down I hooked up the natural gas hose again and ran it on NG for the rest of the outage. I think I did another oil change at 24hrs. and then roughly every 48hrs. after that. Probably overkill but better safe than sorry. I was worried initially that the 1/2" hose might not give it enough fuel but had zero issues throughout the storm. I may buy a longer 3/4" hose to give me more flexibility as to where I place the generator in the future.

We kept the AC and fridge on throughout the outage and were able to use all the other lights and small electronics we wanted. The dishwasher ran, although I didn't run the dry cycle as I wasn't sure how much juice that would pull. I turned on the electric stove just to test the ability but did most of my cooking on the blackstone outside. We have a Breville espresso machine that is 1,560 watts and we used that several times with the AC running. Wife was able to use her 900 watt hair tool with no issues. Didn't try to run the dryer because although I know we'd have had the electricity to run it, I was not sure how using a gas clothes dryer would effect the generator running outside also running on NG. All in this generator ran several stretches of 18 hours+ and I put over 120 hours total on it. No issues starting the unit or keeping it running. Not having to chase gasoline or propane made this week so much less of a pain in the tail. We had no issues with the various electronics in the house not liking the power. The display on the generator shows the Hz output and it usually bounced between 60 and 62. Most of our lights are on smart switches and have dimmers with LED lights. Other thank some flickering, all worked fine.

Closing thoughts:

I'll probably invest in a tent of some sort to keep the unit covered in the future. I harnessed my inner Eagle Scout to pitch a 4x6 tarp over it this time and while sufficient, I think a little pop-up would be simpler to take up and down. Not sure if I will spring for the gen-tent but who knows. The grass where the exhaust exited the unit is completely toast. I'm happy to trade that patch of grass for having AC for the past 6 1/2 days but I'd be leery if I was parking this thing on artificial turf or a composite deck. The exhaust puts out tons of heat. Consider the path your hose and cord take to get to one another. I lost a branch Tuesday morning that fell directly on the generator cord and yanked it out of the outlet. I was able to repair the head of the cord but it was a close call that would have screwed up the entire setup. I may invest in a spare cord or at least some way to repair the ends of the cable to have on hand just in case. All told, the generator was a workhorse. I told the wife when we got power back that I haven't been this pleased with a purchase in a long time. We don't have family nearby that we could have stayed with and with 2 kids under 3, we would have ended up in a hotel without the generator. I feel like I already broke even on the purchase after the first time we used it.