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EcoGen 15kW Home Backup Generator

Model #7034
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Whether the off-grid lifestyle is a choice or a necessity, you are responsible for producing the energy you consume – even when there’s no sun or wind. Ensure you never have dead batteries with the Generac EcoGen–the only automatic standby generator designed and warrantied specifically for off-grid use with an alternative energy system.


Unlike competitive units that run at a constant speed, patented G-Flex technology allows the Generac EcoGen to run at lower speeds when household electrical demand is light. That means significantly quieter operation at normal capacity, less fuel consumption when you need less electricity, and cleaner power than competitive air-cooled home standby.

Innovative Extended Run Capability oil circulation system extends the maintenance intervals by an unprecedented 5 times the industry standard by offering 500 hour maintenance intervals.

Generac generators and engines are engineered and built in the USA*.
*Assembled in the USA using domestic and foreign parts

Generac's G-Force Engine is a purpose-built, pressure-lubricated engine capable of handling the rigors of generator use, resulting in power that’s more reliable and requires less routine maintenance than any competitive engine. Learn more about the G‑Force Engine »

3 Year / 2,000 Hour Limited Warranty for automatic standby generators.

Quiet-Test™ Self-Test Mode runs at a lower RPM for a five or twelve minute test, making generators significantly quieter than other brands while consuming less fuel.

24/7/365 Customer Support Team standing by all day, every day from our headquarters in Wisconsin to answer any questions you might have.

Our RhinoCoat™ powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.

Generac’s Evolution™ Controller features a multilingual LCD display that allows users to monitor battery status and track maintenance intervals to ensure your generator is always in top operating condition.

Home Generator Resources

The purchase of a home backup generator will give you peace of mind for years to come, but it’s a big investment. That is why we want to give you as much information as possible so you can make the right decision based on your needs and budget. The options below will help you understand how the entire process works, what your financing options are, and how to choose the right backup power solution.

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Rated 4 out of 5 by from Great product when it works. The generator was supplied under warranty replacing an identical one that failed on warranty after multiple repairs and only 730 hours of use. When it worked it was an excellent unit and we hope that this unit will be trouble free for years to come. The local Generac Service Technician has been very knowledgeable and great to work with.
Date published: 2018-09-26
Rated 5 out of 5 by from Great Off-Grid Solution From un-boxing to start-up it took only 3 hours to install. The installation documents were easy to follow during the installation and converting the unit to Propane was super easy to do. I will be using this as a back up to my solar system and will be using the two wire automatic starting option. The noise level is better than I expected with a 15kW generator. So far... So good.
Date published: 2018-08-20
Rated 1 out of 5 by from !st one failed! 1st Ecogen had engine blow 30 days after warranty expired! 3 years! Now have no choice but to replace it with the same! Generac will not warranty any other for off Grid! Even though all companies who sell them recommend that I get a better Generac! Will have to see if this one "blows". By the way, the old one only had 700 hours!
Date published: 2018-08-20
Date published: 2018-07-16
Rated 4 out of 5 by from Off grid and high-tech For me, this 15kw generator replaces a smaller predecessor, but I have also installed new Outback inverters as a load. They have a higher charging current then my previous inverters, so the increased capability seemed necessary. I like the idea of a governor so the generator needn't run full tilt all the time. Generator life should thereby be extended, and propane gas use moderated (though I had to replace my old half inch underground gas line with a 1 inch line, per instructions). I would give this five stars if they would improve their installation guide. Some of the electrical connections are not adequately explained in the literature, and the controller underside had multiple unexplained pigtails rather than the two shown in the instructions of figure 6-2. (I had to guess which poorly explained and oddly named wires were 183 and 178). I also did not enjoy the "activation" task. You can't effectively use the generator until you email or call Generac for a password. The website refused to accept my remote address and I was forced to call. The call went quick, but off-grid independents like me don't like having to manage an umbilical cord with the industrial world. Hopefully the cord is now severed and I won't need to restore it.
Date published: 2018-03-13
Rated 5 out of 5 by from Off-Grid Replacement As this was a replacement for a much larger (in physical size) generator, it went in very easy. It is small compared to the original, easy of the eyes, and much quieter. I am hoping for good performance with little to no issues. It is nice to have electric at night again.
Date published: 2017-12-21
Rated 5 out of 5 by from Has worked Great for 3 Years! We are off grid with a 15 KW solar power system. I purchased this 15 KW echogen 3 years ago. it now has almost 1000 hours on it and is still running strong at a 6200 foot elevation. I am now looking at a second as a backup. Great product.
Date published: 2017-10-03
Rated 4 out of 5 by from Nice Ecogen Very happy with the new ecogen, but it was only installed yesterday so who knows how it will actually perform. Sound spec was spot on at 63dB from 20'. Documentation is inconsistent. Advertisement says ecogen has weekly test run cycle, but tech support says this model does not. Need to clean that up for a 5 star rating.
Date published: 2017-09-21
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15kW-7034 is rated 4.2 out of 5 by 13.
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