A Generac standby generator protects your home or business. Our generators run on either natural gas or liquid propane, and sit outside your building similarly to an air conditioning unit. A backup generator delivers power directly to your building’s electrical system, providing power to essential areas and appliances, or even the entire house or office in the event of a storm, construction, or other disrupting event!
You don’t have to worry about being there to start and stop your Generac backup generator. Standby generators are able to start and stop automatically as needed!
There are no need for extension cords with a standby generator from Generac. Your Generac backup generator safely delivers power right to your electrical panel.  Based on the unit installed, emergency power can be supplied to some or all of your residence of place of business.
Generac automatic home backup generators are permanently installed. Automatically deliver power during an outage. Can back up your entire home if you choose. And are the preferred brand of homeowners who invest in home backup power.
Whether a power failure is simply not an option, or you just want an advantage over your competitors during a power outage, Generac standby generators make sure you’re open for business during a power outage.
Generac dominates the residential standby generator market in the part because they make a generator for every size application. Check out our most purchased packages below.
Generac PowerPact 7.5kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 25 amps of continuous power (31.25 amps on LP). It has a rugged aluminum enclosure and comes equipped with an 8 circuit transfer switch (breakers included) for your application. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Generac Guardian 10kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 37.5 amps of continuous power (41.7 amps on LP). It has a rugged aluminum enclosure and runs at 3600 RPMs. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Generac Guardian 13kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 54.2 amps of continuous power. It has a rugged aluminum enclosure and runs at 3600 RPMs. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. G007173-0, G007174-0, G007175-0, 7173, 7174, 7175
Generac Guardian 14kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 58.3 amps of continuous power. It has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Generac EcoGen 15kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 62.5 amps of continuous power. It has a rugged aluminum enclosure and runs at 3600 RPMs. It’s designed specifically for off grid applications. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Generac Guardian 16kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 66 amps of continuous power. It has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. G007176-0, G007177-0, G007178-0, 7176, 7177, 7178
Generac Guardian 18kW air cooled standby generator runs on either natural gas or liquid propane. It has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Generac Guardian 20kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 75 amps of continuous power (83 amps on LP). It’s Generac’s top selling model nationwide, and it has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. G007039-0, G007038-0, 7039, 7038
Generac Guardian 22kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 81 amps of continuous power (91 amps on LP). It’s Generac’s top selling model nationwide, and it has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
The Generac Protector QS Series 22kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 92 amps of continuous power. It’s powered by an In-line 2.4L 4 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. RG022
Generac Guardian 24kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 87.5 amps of continuous power (100 amps on LP). It’s Generac’s newest innovation with the highest power rating of any air cooled generator, and it has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. G007209-0, G007210-0, 7209, 7210
Generac Guardian 26kW air cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 93.8 amps of continuous power (108.3 amps on LP). It’s Generac’s newest innovation with the highest power rating of any air cooled generator, and it has a rugged aluminum enclosure and comes equipped with wifi monitoring so you always know you’re ready for any emergency. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. 7291. 7290
The Generac Protector QS Series 27kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 104 amps of continuous power (113 amps on LP). It’s powered by a 2.4L 4 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. RG027
The Generac Protector QS Series 32kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 133 amps of continuous power. It’s powered by an In-line Turbocharged 2.4L 4 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. RG032
The Generac Protector QS Series 38kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 158 amps of continuous power. It’s powered by a turbocharged 2.4L 4 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. RG038
The Generac Protector QS Series 48kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 200 amps of continuous power. It’s powered by a Naturally Aspirated Inline 4.5L 4 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RG04845
The Generac Protector Series RGO 60kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 250 amps of continuous power. It’s powered by an In-Line Turbocharged 4.5L 4 cylinder engine that runs at a 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RG06045
The Generac Commercial QTO Series 70kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 267 amps of continuous power (292 amps on LP). It’s powered by a V Type 6.8L 10 cylinder engine that runs at a super quiet 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges. This model has been discontinued.Request a turnkey installation quote on this generatorModel No. QT070
The Generac Protector RGO8045 Series 80kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 333 amps of continuous power. It’s powered by a turbocharge inline 4.5L 4 cylinder engine that runs at a 1800 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RGO8045
The Generac Protector Series 100kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 400 amps of continuous power. It’s powered by a V Type 8.86L 8 cylinder engine that runs at a 2330 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RG10090
The Generac Protector Series 130kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 542 amps of continuous power. It’s powered by a Turbocharged and aftercooled 8.9L V8 engine that runs at a 2330 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RG13090
The Generac Protector Series 150kW liquid cooled standby generator runs on either natural gas or liquid propane, and is the perfect solution for those who need up to 600 amps of continuous power (558 amps on LP). It’s powered by a Turbocharge and Aftercooled 8.9 V8 engine that runs at 2330 RPM’s, and comes equipped with a rugged aluminum enclosure. We include your 1st year of maintenance at no charge, and we include a free surge protector with every installation to help protect your generator and all sensitive electronics from grid outages and electrical surges.
Request a turnkey installation quote on this generatorModel No. RG15090
Are you prepared?
1980
Hurricane Harvey
In August 2017 Hurricane Harvey landed in Houston and caused over 126 Billon in damage
0
Without power
It left over 500,000 homes without power in the Greater Houston area (Compared to 2.1 million for Hurricane Ike)Â
1 days
until restoration
Power restored to 400,000 within 2 weeks, and 500,000 by day 30.
What our customers are saying
This company got it done. There is no other way to describe the dedication from a personal phone call by the president to each and every employee that was onsite.
My mom was diagnosed with stage 4 cancer and they literally moved mountains to install a generator quickly and efficiently. They followed their timelines and showed up exactly when they said they would. There was zero headache on our part and we could focus on providing my mom the comfort care she needs.
This company was outstanding.
We called Grasten to perform the first service on our standby Generac 38 kw generator. Trevor their service technician was professional and knowledgeable. He reviewed the service requirements in terms of what Generac recommends and performed the service with no issues. It was a good experience all around from scheduling the maintenance to the work performed . We would highly recommend Grasten. Good job!
I've been using Grasten Power Technologies the past several years to perform semi-annual maintenance on my backup generator. I worked with Chris Brade (Service Manager) to schedule service. His team always arrives on time within the specified timeframe, performs all service activities per the contract, and informs me of any potential issues. Chris is always available to answer any questions and provide reasonable solution when necessary. I've recommended Grasten to friends and neighbors. Excellent service at a fair price!
The price was right, the instillation was well done, and Josh Keller did an excellent job making sure everything went smoothly. Completely satisfied.
Just wanted to share that I had a great experience with Grasten. Really friendly and competent people - from their office staff to their field crew. I highly recommend them for your generator needs.