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45kW Protector

Model #RG045

Starting At

$16,119.00 Where To Buy

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Generac Protector 45kW Standby Generator

Automatic Backup for Large or Custom Homes
Looking to back up your entire home, or more items than usual? Consider the Protector Series gaseous automatic backup generator line. These units powers essential appliances and modern technologies during power outages, allowing homeowners and their families to continue living life comfortably and without interruption.

What Makes the Protector Series Such a Great Choice?
Generac's Protector Series offers benefits that competitors’ can’t match. Installation flexibility and cost reduction. Sophisticated, yet intuitive controls. Quiet operation. Supported by a 24/7/365 customer support team at our corporate headquarters, and a nationwide dealer network of more than 6,000 strong.

The best liquid cooled engine packs more power into a smaller footprint - ideal when space is a premium.  The neutral styling, color and small footprint fits unobtrusively into landscaping. Clean burning, continuous fuel choice of natural gas to LP.

True Power™ Technology
Delivers best-in class power quality with less than 5% total harmonic distortion (THD) for clean, smooth operation of sensitive electronics and appliances.

Evolution™ Controller
A cutting-edge, intuitive control. The Evolution controller features a multilingual, two-line LCD text display with color-coded, backlit buttons. It has received upgrades, including USB flash capability, smart battery charging, voltage adjustment, and backlit membrane pad style buttons.

5-year limited warranty, with extended warranty options available.
We are proud of our innovative product design, high quality and first-class reliability so we stand behind them with a strong 5, 7 or 10-year limited warranty.

Tough, Durable All-Aluminum Enclosures
Our RhinoCoat™ powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.

Quiet-Test™
All backup generators run a weekly test to ensure the system is running properly. Thanks to Quiet-Test, your Protector Series home generator runs its self-test at a lower, quieter RPM, which can be programmed to run weekly, bi-weekly, or monthly.

Mobile Link™ Connectivity
Mobile Link™ Connectivity allows you to monitor the status of your generator from anywhere in the world using a smartphone, tablet or PC.  Easily access information such as the current operating status and the generator's maintenance schedule. Learn more about Mobile Link
Mobile Link comes standard with Protector Series 22 - 100 kW gaseous models and diesel (RD) models.  The Wi-Fi device is standard on every Protector series generator except for the RG13090/RG15090 and the 130 - 150 kW gaseous models.

Additional Features
Improved stub ups and electrical connection access decrease installation costs. All connections are dual conductor rated, and the implementation of quick connects for the control wires, completely eliminates the need for crimping or lugging.
Improved customer connection access, which decreases installation costs.

Generac <strong>Protector 45kW </strong>Standby Generator

Home Generator Buyer's Guide

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Rated 5 out of 5 by from 45KW Had a 45KW installed and power went off the next day for only 9 minutes and for that time it went great. Since then no outages thank god but I now have a peace of no worries
Date published: 2023-08-27
Rated 1 out of 5 by from new unit never worked Just built a new house with a new Generac. No technician can get the unit working. It has been over 2 months since closing and Generac is still not turned on. Very disappointing. Do not recommend at all!!!
Date published: 2023-07-11
Rated 5 out of 5 by from Peace of Mind is important to me This product has come to me highly recommended. I hope I never need it but I'm sure I will. It's nice to know that I'll have the convenience of not being without power
Date published: 2021-11-26
Rated 5 out of 5 by from Reasonably priced With any luck I will never have the pleasure of using the generator but if I do I feel positive that it will be there when needed. I love all the safety features as well as the appearance and the fact that if our electric does go out that all of our electric needs will be met.
Date published: 2019-12-09
Rated 1 out of 5 by from Hopefully gets better from here Installation was complete the last week in July. The unit operated one hour and twenty minutes and the timing gear came off the crankshaft. obviously improper assembly. that engine is an interference engine the valves hit the pistons when they lose timing. the engine was totaled. Generac replaced the engine which took over two months! Hopefully it gets better from here.
Date published: 2019-10-10
Rated 5 out of 5 by from Great Product Unit does what it is designed to do and purrs like a kitten. Installers were capable, courteous, and efficient.
Date published: 2019-09-12
Rated 5 out of 5 by from This generator is just what we need to keep our home and farm shop up and running. The value for the price is well worth the money. This generator is just what we need to keep our home and farm shop running when the power goes out, which is very often. The appearance is very neat and really makes our new home look outstanding.
Date published: 2019-02-07
Rated 5 out of 5 by from Be totally prepared for power outages for days if necessary We happened to be hit by a tornado and while the entire neighborhood is totally pitch black our house was fully functioning. Kept pool pumps going during downpours of rain and saved our pool liner and auto cover. We went 4 days without power due to the damage and so many trees on the power lines. Never missed a beat and ran for 4 days. We were able to help our neighbors with water, charging, etc. Just got this RG045 installed due to our RG036 getting hit by lightning Sept 2018. Our peace of mind is back after several weeks of dreading thunderstorms or ice/snow storms. Highly recommended by our entire family for reliability and its auto transfer switch does all the work switching from Generator to Electric Company once the power supply is stable. Great value for the money.
Date published: 2019-02-04
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45kW-RG045 is rated 4.3 out of 5 by 13.
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Protector Series Accessories

Maximize your investment and maintain your Generac home standby generator with a variety of accessories.