GENMAX Portable Generator, 2800W ultra-quiet gas engine,with CO Sensor and Parallel Capability, Ideal for camping outdoor Home backup power.EPA &CARB Compliant (GM2800iSAC)

I purchased this GENMAX generator in October 2025, and it has worked out really well for what I bought it for. One of the biggest things I like is the price. For the amount of power and the features you get, I think it’s a really good value. It’s also very easy to use. Starting it is simple, and I was honestly surprised by how easy it is to pull start. The noise level has probably impressed me the most. I expected a portable generator to be noticeably louder, but this one is actually very quiet. That makes a big difference for how I use it, especially on hunting trips where I don’t want something running that sounds like a lawn mower sitting beside camp. It’s also light enough that moving it around isn’t a hassle. I wouldn’t call any generator weightless, but this one is very portable and easy to load, unload, and move where I need it. Routine maintenance is straightforward too. Basic things like checking and changing the oil are easy to get to, which I appreciate because I don’t want maintenance to turn into a project every time. Fuel efficiency has been good, and it puts out plenty of power for my needs. I mainly use it on hunting trips to recharge batteries and keep my portable power station charged. The available outlets and ports give me plenty of options for plugging things in without needing a bunch of extra adapters or equipment. I really don’t have any complaints about it so far. It’s quiet, easy to start, portable, fuel efficient, easy to maintain, and has enough power for what I need. For someone looking for a small portable generator for camping, hunting, backup charging, or similar use, I’ve been very happy with it.

*UPDATED 6 Months Later* I am so pleased with this little generator. Since my original review of using this generator for running compressor and power tools, I finally had the opportunity to run it for the purpose I bought it for; running a small air conditioner at my no-power hunting camp. The generator performed exactly as expected, and was able to run the small 5,000 BTU air conditioner as well as some lights and providing me an AC outlet in my hunt camp camper for my phone charger for 6+ hours in 90 degree temperatures on the one gallon of gas. The generator is light enough for me to transport wherever I need it, so I have used it to run power tools on other "in the woods" projects to run my saw and nailer, electric landscaping tools and other plug-in equipment at my hunting stands. My latest experiment involved trying to run the electric systems on my 17" popup camper on this generator. With the 13,500 BTU rooftop air conditioner, as well as the Absorption-type fridge, and the main lights (2x LED banks) the generator was able to run everything. Once the AC ran through its start up cycle (large, temporary draw) and went to steady draw of about 1300 watts to run, I was able to run everything in eco mode, and did not overload the generator. I am incredibly pleased with the output of this generator and the small fuel consumption, small footprint, and relatively quiet operation. I would definitely purchase this again if I had need to replace this unit, or if I had increased power consumption. *ORIGINAL REVIEW* I purchased this generator on a Lightning Deal. It was a little bigger than what I wanted. I needed a small generator to run a 5000 BTU window AC on a camper I use at hunt camp. I was looking at the smaller Genmax generator (1200) but saw this one at basically the same price. This last weekend I had the opportunity to put it through its paces helping a friend build a cabin on a remote property he has. This generator was able to run a compressor (to run a framing nailer) as well as a chop saw for cutting dimensional lumber for framing, and a circular saw for cutting zip board. We even had an extra outlet we used to charge power tool batteries. The generator would struggle just a little bit if the air compressor and the chop saw ran at the same time, but it would catch up quickly and push on through. We ran the generator continuously for 6 hours on the single tank of gas. While its primary purpose will be to run the AC unit, I am now confident that I will be able to also run lights and perhaps even some appliances at the hunt camp trailer. The generator was quiet enough to be able to have a conversation standing next to it without really raising your voice. In fact, it was quieter than either the air compressor or the chop saw when they were running. All in all, I am very happy with its performance over the weekend, and I'm sure it will be more than adequate for what it was originally purchased for.

Starts easy, manageable weight seems to be easy on gas. Biggest issue is you have to use it where exhaust can not be sensed by the unit or it will shut down. This includes back of a pick up, back of an off-road,Ute, wall that would reflect the gas, etc..

Awesome generator. Where we live our power goes out quite often and we need it for our sub pump. Highly recommend buying this!!!

I couldn’t be happier with the GENMAX GM2800iSAC! I bought it for camping trips and to use as an emergency backup generator, and it’s honestly been a game-changer. What I Love About It: ⚡ Plenty of Power – This little generator has more than enough juice to run my 5,000 BTU AC, lights, and all my small electronics (phone, laptop, etc.) simultaneously without breaking a sweat. The clean inverter power means I can run sensitive devices with zero worries about damage. 🎒 Super Portable – Weighing only 45 lbs, I can easily carry it from the car to the campsite. The handle is solid and makes it easy to transport, even when it’s fully fueled. 🔇 Surprisingly Quiet – It’s definitely quieter than traditional generators! We were able to have normal conversations standing right next to it. It’s not “silent,” but for the power it provides, it’s impressively quiet. ⛽ Great Fuel Efficiency – The runtime is awesome! I’ve been getting around 6–8 hours on a single gallon of gas at partial load. That’s perfect for longer camping trips or power outages without constantly needing to refuel. 🛡️ Awesome Safety Features – The CO Detect sensor gives me peace of mind when using it indoors or in semi-enclosed spaces like the garage. I love that it automatically shuts off if unsafe CO levels are detected. Final Thoughts: For the price, this generator punches well above its weight. It’s powerful, portable, and built with safety in mind. Whether you're camping, tailgating, or just want some peace of mind during power outages, this generator is a fantastic choice. I couldn’t be more satisfied with my purchase—highly recommend it!