Whole-Home Generator Installation
Whole-Home Generator Installation in Marin, Sonoma & Napa County
Whole-house generators protect you during power outages.
That means your refrigerator will keep running, you won’t have to throw away half of your groceries. Your lights will stay on, hold those candles for the next romantic dinner! Also, the Wi-Fi will keep working.
Your heating and cooling system won’t miss a beat either so you can stay comfortable. Your sump pump will remain powered so that you can avoid flooding and water damage.
More and more California homeowners are investing in standby generators. With all the unpredictable weather and surprise outages, it’s not hard to see why. With a constant supply of electricity, you’ll always be prepared. You can trust our team at Ongaro & Sons to help you choose and install a generator that meets all your needs.
How Whole-House Generators Work
Whole-house generators are permanent fixtures that automatically protect your home the moment the power goes out. Here’s how they work, and why more North Bay homeowners are installing them every year.
How Does a Whole-House Generator Operate?
Whole house generators sit on a pad outside your the North Bay home. They’re sometimes referred to as fixed standby generators.
Whenever there is an outage or your equipment malfunctions, your generator kicks on. It automatically begins powering your home.
When the generator detects a disruption in the current, an automatic transfer switch disconnects from your utility and sends electricity to your panel. Running on your home’s natural gas line, the generator can keep your home powered for days.
When the electric company restores service, your generator will return to standby mode.
Why Your Marin, Sonoma & Napa County Home Needs a Standby Generator
the North Bay has unique challenges. The power grid can be unpredictable, especially during wildfire season and extreme weather events. A standby generator ensures your home stays powered, safe, and comfortable when the electricity goes out. Here are the top reasons anyone in the North Bay should consider installing a standby generator.
the North Bay is particularly susceptible to PSPS events, where utility companies intentionally shut off power to prevent wildfires during high-risk weather conditions. A standby generator ensures your home remains powered through these multi-day outages.
Beyond PSPS, actual wildfires in the North Bay can directly damage power lines and infrastructure, leading to prolonged outages in affected and surrounding areas. A generator provides crucial backup during these emergencies.
During extended outages, refrigerators and freezers fail, leading to costly food spoilage. A standby generator keeps your appliances running, protecting your groceries and other temperature-sensitive items.
the North Bay also experiences significant winter storms, especially in elevated and coastal areas, bringing heavy rains and strong winds that frequently down power lines and cause widespread, lengthy power disruptions.
A standby generator powers your essential home systems, including your HVAC, lighting, well pumps, security systems, and even critical medical equipment, providing continuous comfort, safety, and peace of mind during any power loss.
How Is a Whole-House Generator Different From a Portable Generator?
Portable generators are excellent for outdoor activities like camping and tailgating. They are designed to power individual items like lights or appliances.
However, they don’t provide nearly as much power as a whole-house generator. Portable generators are also more prone to overheating or energy overload.
Whole-house generators are permanent home fixtures that ensure you’ll never be without power. Even if your home loses power while you’re away, you can be sure your appliances will keep working. Whole-house generators also increase your home value.
Whole-House Generator Installation and Replacement
Looking for a fantastic upgrade to your home? Our team at Ongaro & Sons is just a phone call away. Standby generators require close planning with our specialists, different homes have different appliances and energy usage needs, and we want to be sure we find one that works right for you.
We will also help determine a solution that works with your budget. These generators work with gas, diesel, or oil. Schedule an installation online today for a consultation and an upfront estimate from one of our experts.
Be sure to ask about our convenient financing options (subject to approved credit) and quick decision process.

Whole-House Generator Repairs and Maintenance
Your generator has one job and plenty of downtime. Whole-home generators sometimes fall prey to issues like:
- Clogged fuel filters
- Coolant leaks
- Battery failures
Our team of specialists is adept at problem-solving. Even if it’s a complex issue, we can bring your generator back online in no time, and we always give our customers an upfront estimate before performing any fixes.
Preventative maintenance is the best way to avoid generator breakdowns and preserve its lifespan. Generators require yearly maintenance from a professional, just like your car, they need an oil change to keep the parts running smoothly. Your technician will also need to replace your filter and occasionally change out spark plugs.
Many of the broken generators we repair could have been resolved during a maintenance visit. You can also join our Ongaro Maintenance Plans, together, we’ll set up a schedule that works for you, and we’ll even call you when you’re due for a check-up. You’ll also receive discounts and priority service.

Schedule Your Whole-Home Generator Service
Whether you need a new standby generator installed, a repair, or routine maintenance, our experienced team is ready to help you stay powered through any outage. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, Sebastopol, San Rafael, Novato, and surrounding cities. Call us now at 415-741-2820 or book your appointment online for fast, reliable whole-house generator service you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Whole-Home Generators
Public safety power shutoffs made backup a normal North Bay purchase, and sizing is where most of them go wrong.
Schedule Service →Certified Generac Generator Installer
Ongaro & Sons is a certified installer for Generac whole-home and commercial standby systems, a certification that covers commissioning as well as the installation.
You choose circuits, not just a machine
The useful question is which circuits must stay live: refrigeration, well pump, medical equipment, a home office. That decides the size, and it usually costs less than backing up everything.
Gas and electrical both in-house
A standby generator needs a gas supply and a transfer switch. Holding C-36 and C-10 means the fuel line and the electrical work are the same contractor.
Transfer switch and permits handled
Automatic transfer switches are permitted work and are inspected. We pull the permit and meet the inspector.
Sited for noise, clearance and code
Setback, clearance and exhaust direction are code requirements and also neighbour considerations. Getting siting right at the start avoids moving it later.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Do you install automatic transfer switches?
Yes, these switches detect outages and automatically shift power to the generator within seconds, keeping your home running smoothly.
How often should my generator be serviced?
We recommend a full inspection and service at least once a year; however, check your manufacturer's recommendations for an accurate maintenance schedule. Regular maintenance ensures reliable operation during unexpected outages.
What size generator do I need for my home?
It depends on your power needs. We’ll calculate your load requirements and recommend the right size to keep essentials, or your whole home, running.