Pulsar Products GD400BN, 4000W Portable super-quiet Dual Fuel & Parallel Capability, RV-Ready, CARB Compliant

*Update 1/17/24* Still working great, still running it only on propane. We have been having single digit temperature weather and I have been able to get the generator started relatively easy to run the block heater on my truck. Truck is parked far enough from an outlet that it's easier to turn on the generator to get power by the truck that way. When power went out it was also great to have the electronic safe power that this provided. Starlink internet kept the home entertained, the generator ran other electronics, and propane kept us heated. Overall, still very happy with the generator. Have not run the generator on gas, only have ran mine on propane. Generator ships with all you need to get started, except the fuel source. Oil funnel is also used to drain the oil. Makes it very mess free for oil changes. Which I recommend changing after the first hour, since there's all kind of glitter in the first oil change. I then ran it another couple hours and changed again. Much cleaner this time. Holds 15 ounces of oil so a standard quart of oil can do two oil changes. In total I changed the oil three times during the break in before switching in full synthetic oil. It runs very quiet and stays pretty quiet under load. Quieter than a smaller 700 watt inverter generator I have and while not as fuel efficient it is still very economical with how much propane it uses. Revs up to produce power and has run my 10,000 btu window ac without issue. Ran a 5,000 btu and small .7 cubic foot microwave at the same time off of it. I love the size of this unit for the amount of power it produces. You can parallel two of them if you need more power. Really the only downsides I have would be no electric start, and the outlet selection is sparse. Got mine with coupon off of Amazon and have no regrets so far. Will update if anything negative happens

Full disclosure- i've only owned this 4000W Duel Fuel generator for 3 weeks, but I've already had some good use from it and I've been very impressed thus far! I bought this to power my truck camper, and specifically my A/C on the truck camper when it's very hot. I had been carrying a 2000W Firman gas-only generator prior, and while I can run the A/C on the camper from that, it is nearly maxxed out when I do so I don't think I could run it for long if necessary, and there is the issue of carrying gas. The storage compartment of my camper requires laying the generator almost on its side to get it in/out of the compartment, and I've had gasoline leak into the compartment prior when doing so. No Bueno!! So I bought this generator, which is virtually the same size and weight as my Firman (which otherwise I've been very impressed with as well, btw) but allows me to operate from the on-board propane tanks located in my truck camper. It's clean and convenient to do so, and this generator runs pretty quietly given it can put out 3,200W continuously and 4,000 surge watts if necessary! It also produces a clean sine wave signal, so I don't have to worry about frying my cellphone, laptops, etc while charging. It is a few decibels louder than a Honda 2000i or 2200i, but close to 2 x's the output for a few decibels more. And at lighter loads on eco mode it is still very quiet (which is where it will operate most of the time I'm using it; less than 50% load.) I bought it and broke it in and tucked it away in the camper to take to the Sierra for one last skiing weekend, and lo and behold, it saved my butt when my diesel fuel gelled and I had to run the Pulsar for 3 hours to power my truck's block heater to get it started! My Firman could have handled the 700-800W draw as well, but again, nice to pull it out, hook it to the propane extension and fire it up. On that note, with propane I do need to give it a pull or two on choke before it starts on propane, but it runs perfectly once I do so. I'm at the 5 hour mark so I'll change the oil again tomorrow which should be the last maintenance I need for awhile. I really can't believe I found a propane generator with twice the capacity as my Firman 2k/1,600W gas generator for $500 (caught a sale on Amazon.) If my experience changes over time I'll update, but so far I'm very satisfied with this Pulsar Dual Fuel generator!

The generator worked every time I did the test run. When I actually tried to use it to charge up the batteries in a boon docking situation, it ran for 17 minutes. Then it quit. No spark. Pulsar has a help(less) line. When you need help they just tell you to take it someplace and they will send parts. Well, done. Still haven't received the parts or any notification that they are actually really sending them. Choose a generator that you can actually get serviced if it fails.

I've had 4 suitcase generators before this one. Overall I am pleased after 6 mos of steady use of this one. BUT: loads of brass flex in the oil after break-in. I'd suggest change the oil after the first hour or less. No flex after break-in. Pull cord comes out 13" before it catches. That's OK in warm weather and when it's newer and starts well, but later on could be a prob. The round 30A plug is a bit of a nuisance to me. I had to buy an adapter to go to three regular 120V sockets. There is only one regular socket on the unit, but maybe they couldn't fit another in. Otherwise, it's hard to find a compact light weight unit with that many watts. And this one runs on propane as well ( I have collected all the brass fittings to tie it into my RV propane system, right after the regulator, starting with a 3/8 brass T, and incl a quick connect fitting with a built in valve, Camco 59853). A typical RV gas regulator has the correct pressure, so you don't need to use the one that comes with the generator. And its reasonably quiet for 145cc and 3200 running watts. It's a bit hard to start on propane, probably because of air in the hose at first. So start on gasoline, then turn the gas valve on at the propane tank (or in the line), then put the fuel switch on the generator to propane. It will cough a wee bit, but keep running.

My use case is a travel trailer hooked up to a Bluetti AC300 Solar Battery system. I don't have a large enough solar array (yet) on the RV to charge the batteries to full but enough solar to cover our normal usage inside (not counting things like A/C). So my intent for the generator is to charge the batteries in a few hours a day so we can make it through the night with some medical machines inside when there isn't shore power. The generator isn't too loud, but it is louder under load than we expected it to be. As for our use case, this claims 4000W peak, 3200 Continuous on Gas and 3600W peak / 2800 W on propane. I have only used it on Propane. We just took this setup out for our first trip. The AC300 lets me change what my "Grid" power is rated at (15A, 20A, 25A or 30A). Here is how this worked out: At 30A setting on the AC300 (connected to the 30A on the generator) the AC300 tries to pull 3000W. The Generator quits, never gets to the full power. In fact, the Generator quits right around 2200-2400W, cuts the power, and resets itself. At 25A setting on the AC300, it tries to pull 2500-2800 Watts. Theoretically, this generator can do that. It doesn't, still resets and cuts power. At 20A setting, the AC300 will pull around 2200-2400W. This works for about 5 minutes, then again the generator cuts power. At 15A, it pulls around 1800W. This is stable, while plugged into the 30A port. This will charge my batteries in a couple hours, but not if I'm running A/C. All in all, it does work, runs on propane (all I've tested), is not too expensive for a Dual Fuel, and I will likely purchase a second to run in Parallel which is a nice feature and I think would solve my issues. My electrical knowledge is limited, I'm not sure why I can't get the rated wattage, but it's getting us through our "boondocking" trip for now. Since I will need two of them though, at $500+ each, there is probably $1000 generators that would have been a better purchase for my use case.

Purchased this for the propane capabilites and not bother with changing the carburetor fuel jet in high altitude. Generator is capable of handling on 13.5 btu A/C with a soft start installed and a 12v refrigerator with gasoline. Lost a few watts on propane, but it handles the mentioned A/C with no issues. Generator is durable if maintenance is done. Worked perfect as described. PROS: Great value. Not heavy even with full tank of gasoline. Turns on easy with gasoline. Recommend premium 93 octane and stabilizer for less issues. COMES WITH oil, spark plug removal tool and other maintenance stuff. CONS: A little difficult to start cold with propane. Slight discoloration spots to removable covers due to contact with internal heat (cosmetic issue). No hourly meter to help with maintenance. Air filter was dry, you have to lightly oil it. Big hands can't fit through spark plug door access. I don't like the screw in type propane hose inlet to the generator. A quick connect type design would make set up efficient. No gasoline fuel meter, have to guess or purchase an extended fuel tank. No ampere or Watt meter. Overall, I recommend this generator. My cons were more of a design improvement.

2024 update : first extended power outage of the winter and I pulled this out and it started up in 3 easy pulls on 1/2 choke and powered my fridges for 37 min before the power company got powered restored after i ran my extension cords. HA. it ran great for another hour in the rain before I put it away. This is all off of natural gas, so no gunked up carb. This is a 50lb 3KW (4kw surge) generator that runs great, so far. I have not had an emergency that requires long use, but I ran it for a couple hours each over a few days for break in with oil changes in between. It is powerful : i tested a space heater and some other gear to put it over 2KW load, and it help for an hour no problem. My neighbor thought i was running an air compressor and not a generator. It is quiet enough to have a conversation nearby but not as quiet as a honda. It is >50% as powerful. I have only run this on propane. Getting it started on propane was a pain the first time until I figured out the proper choke setting. The full choke setting won't start, but you have to put it at full choke until you get a partial start, then put it 1/2 between run and full choke. There is no detent, but it works to start and it cranks right up with the mid position. first oil change after 1 hour was pretty shiny. following oil change after a couple more hours was much better.

I’d like this one you can go from gas to Propane with just a flick of a switch! Always starts on the second doesn’t use oil I just want a lot I would buy it again