4000W Dual Fuel Generator

(Updated review:) I am changing my review to 5 stars as after correspondence with MaxpeedingRods and going through their checks they have stood up and done what’s right and stood behind their product by replacing our Generator. I believe that there was a fluke issue with the original one and it originally worked 100% only to later loose the electronic start function. I have no reason to believe that this is a systemic issue and think that it was just our luck of the draw to have that issue. The new generator works flawlessly. When a company like MaxpeedingRods stands behind their product we can tell that they are a company that we would like to continue to do business with and recommend their products to our family and friends. For full disclosure I paid for the first generator out of pocket full price and with the issue and going through their resolution they replaced it. Knowing this you can feel safe in spending money with them for an investment such as this. Thank you MaxpeedingRods! (Original review for reference:) I am going to say it’s a wonderful product with at this point questionable support. I am going through their support for the last week with limited effective responses. If this changes I will change my review to 5 stars but at this point the electric start has failed and they are sending me thru the same tests multiple times. When it arrived everything worked flawlessly and now only the electronic start functions do not work and I eagerly want a resolution but so far I’m just getting scripted responses from the app at first and now via email. If they help me resolve this it will truly be a quality generator however the support has to stand up and provide true assistance for this to happen. I believe they can if they are willing. (Final thoughts) as you can tell if you read everything they did stand behind their product and I once again commend them for it.

This generator is terrible it does not stay running and now the generator does not start at all. I have contacted the manufacturer and product support and have recieved no response. DO NOT BUY THIS GENERATOR!

This is by far my favorite generator that I own (out of four). I use it to charge my solar home backup batteries when solar isn't cutting it. The app works well and the output THD is clean. It's a little louder than my generac iq3500, but the fact that it runs on propane more than compensates for that. I also like that I can pick it up and set it in the back of my truck and use it to power my welder anywhere I go. The build quality is great and is very efficient on propane. I get between 6 and 8 hours on a 20lb tank with moderate use. It's also great for camping when solar isn't enough to power my tent AC. I've also seen several people using them for RV's and they really like them. I also like the fact that they put a light on it. The display tells you all the info you need if you don't want to use the app. I usually don't push it past 2800 watts but it will surge to 3600 watts on propane if needed. I did swap out the spark plug it came with (torch) with an NGK plug. I haven't and don't plan on putting any gasoline in this generator, so I can't speak to it's performance on gas. Another perk to the design of this thing is the internal propane regulator, so I can use any propane hose that I want and not have to worry about an external regulator that other brands require that can break, be left behind, or misplaced. You still have to use a tank regulator, but not the big plastic/metal one that champion and predator come with. It also comes with a parallel kit if you want to combine two of these. I would definitely recommend this generator for any light duty single phase power needs.

I wanted to give this a 5 even though I had problems with it. When it runs, it is quiet and the Bluetooth makes it easy to start even from a distance. The first problem is that you can't let it sit for more than 3 days or you need to remove the side panel, search out the choke, put petroleum gas in even if you only want LPG and it fires right up. I only wanted to run it on LPG because I put it inside the RV when traveling and didn't want the gas smell. To be clear, that was the only problem I had before now. There is a video that shows how to find the choke and the process to get it running again. The video is hard to find , but through the chat or email, they send the link. The support page is actually a joke. It takes you to the descriptions of their generators, but not much in the way of support. Now it stopped running right again and it isn't even a year old, on a 2 year warranty. I called and a technician wanted a video of it running. Not only is it not running right, but it isn't charging the battery and the front work light isn't working. I sent him a video of it running terribly and also, pics of the model #, the sales receipt and even the bar code. The tech agreed that there's a problem and said they will replace it, but they would like me to pay the shipping. I've been trying for days to find out where and how to pay the shipping. They should pay, but I need a generator, so I'll pay, just to have it here. I am very patient and sometimes, you do get a dud, like anything else. But the runaround is a real pain. Now today, they sent an email saying they want a picture of the control panel. I sent that and I should have taken pictures of the underside of the handle because it seems they will ask for that next. The generator is great when it's running but the support isn't good and the warranty is a game of send this, then send that then get a tech's agreement and then the hoops and send things you already sent. And while I'm bitching, we shouldn't need to run it every couple days to keep it running. And if you don't start it every couple days, why isn't the choke accessible from outside the case?

Ran 4 hours on gasoline with a heavy load. 12 plus hours on a 20# propane tank on medium load. Battery doesn’t seem to want to charge so Bluetooth doesn’t work.

As a bare generator it worked well. Powered my 12k BTU portable AC, fridge, some electronics and a blower fan with a 20lb propane tank for over 12 hours no hiccups. The major issue was complete loss of bluetooth functionality, the app and even the onboard lcd screen displaying usage % etc. This left me in a bit of a limbo with hurricane beryl as I wasn’t sure how it would fare overnight. Luckily we got power back in 16 hours. I seriously needed bluetooth to monitor it from the other side of the house while it was on the front porch. It was never exposed to any rain. I emailed [email protected] and exchanged 4 emails. One asked to send them a video of the unit not displaying the bluetooth LED which I did. After that I was told to wait 1-2 business days and one week later I have still not heard a response. Even with the $200 coupon this unit sits at a pricey $899. At that price point the main reason I purchased it was limited availability of other bluetooth-enabled generators. Really you are limited to this one, the MXR4000, Honda 2200i, Ecoflo and Ryobi. Apart from the other MXR none of them are rated for more than 3000 watts. So I bought this one. Now if bluetooth is unreliable and nonfunctional, at $899 you can most definitely proceed with buying a much more powerful inverter generator lacking bluetooth well within 6000W territory. I will update the review and rating once I hear a final usable solution from MXR. For now, I find 3 stars generous simply as it kept us reasonably comfortable with a cold fridge for 14 hours (which one can argue any number of other generators could have done and more at $899).. UPDATE: Customer service was generous in offering a partial refund for the bluetooth malfunction to be used towards the bluetooth surge plug. Happy with their service, increased to 5 stars. They offered to replace it but since it functions as a regular generator I opted for a bluetooth plug and only lose the remote start capability which is fine

Started great, good looking machine, remote start is awesome. Now the bad, after putting in new oil and hooking it to a brand new freshly filled 30lb LP cylinder the generator ran good for 20 minutes and then shut off on its own. Now it shuts off after less than a minute of running every time. Flashes a C02 or maintenance light once and shuts down. It's outside, so a C02 issue is non-existent. Im talking to the manufacturer through their app, slow responses but promising to "send me parts" the last thing I want to do is tear apart a brand new generator to fix a factory lemon. I bought this for an ice fishing trip and I leave this week, now I'm in a bind. Don't buy this unless you want to be frustrated and work on a brand new machine after 20 minutes of idle time.

Feature packed little generator. Handles all of our needs. 3600 peak watts - 3200 running watts on propane. 4000 peak watt - 3600 running watts on gasoline. The wife doesn't like the smell of gas, so I run it on propane. Has Blue Tooth control of starting, stopping. Runs on either propane or gasoline. Has digital gauge for output power and voltage. All this at a reasonable cost. Not 100% sure, but seems to be quieter than my old 2200 peak wattage running generator. Build quality seems to be better too. Only down side is that it's a little heavier, but you would expect that from a higher output generator. Hopefully it will be trouble free. Only problem I had was finding the starter battery connection. The manual tells you to connect the battery, but doesn't tell you where to look. After a bit of searching, I finally found it and connected it. So far, so good.

I needed a generator for a small off grid cabin to charge up the lithium battery pack and I decided to go with the dual fuel MXR4000GT and it has been great so far. Starts up easily on both gasoline and propane even in cold temperatures. I saw a few people mentioning theirs leaks fuel (user error!) that happens when you fill the tank beyond the red bar at the top of the tank... Due to the unit being compatible with a fuel transfer pump there is an overflow to avoid pressurizing the fuel system. Now the 1.1gallon tank is a bit on the small side and if you are always running it like I am (60-85% load) you will only get 2-3hrs on the fuel tank without the fuel transfer pump addon. But that's why I opted for the dual fuel version so that I can run it on 30lb propane tanks with the same 60-85% load I'm getting around 18hrs per tank. I did the effeciency calculations: 1.1gallons of 91 produced 5.5kwh which is 14.8% effeciency and a 30lb propane tank produced 33.5kwh which is 17.8% effeciency. So definitely better running it on propane. It's also pretty quiet depending on the load with it only getting relatively loud above 2000w. In terms of max power output it will hold 3300w @119v charging batteries on both gasoline or propane at 700ft AMSL pushing even slightly beyond that bogs down the engine before tripping the overload. But as always for longevity continues loads like battery charging should be kept below 85% or ~2700w which this unit does happily. After the 25hr break in period on dyno oil I used amsoil 4 stroke synthetic 10w-30 which made a dramatic difference in cold start performance for those using this unit in cold regions. Overall I'm happy with the unit considering the price and features compared to a 3x as expensive Honda with similar running watts. It comes with a 2 year warranty as well. And weighs just 50lbs so it's easy to move around compared to similar spec generators

Product does not charge its own battery, battery slowly discharges while running until display and Bluetooth stops working. Generator seems to run ok and is quite, Bluetooth was nice when it was working but it would not restart using Bluetooth after it was shut down via Bluetooth. Cold starting using the pull cord was not as great as some reviews stated at -20C would not start after several pulls needed to be warmed up then started first pull. Hoping this is just a defective unit and the vendor will ship a new one. But they have not responded to my inquiry. I will start return process through Amazon if they don’t respond.

4& 5 stars out shine the one star reviews of this Generator. I gave this generator 5 stars. The first time starts are always the hardest because no gas or propane are in the lines yet. After that I started it with the rope & handle push start on the front dash of the generator & from the app and they all started on first try that’s what I like to see. I also bought the Wen aluminum dip stick that as a magnet on the end to catch any metal particles from the engine. It fits this model MXR4000 GT. The pictures I posted I did a decibel sound check to see if there the same as this product on YouTube they are. The other test is I wanted to see how many watts a skill saw would use.

Works great

Although dealing with customer service was a bust as starter is defective, however, it has outlasted any of the other generators that i have tried. Lower rating is only because I could not get any satisfaction when I attempted to get a replacement starter after weeks of trying. It does start up easily with pull cord.