Whole-Home Generator Installation Services In Spokane | Mainstream

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Whole-Home Generator Services in Spokane & Spokane Valley

We offer a full line of installation, maintenance and repair services your home generator system may require, no matter the problem or time of year. You can count on the trusted professionals at Mainstream for exceptional service and quality craftsmanship every time.

Homeowners enjoy the following benefits when they choose Mainstream for electrician services:

Upfront pricing: You’ll never pay more than you’re quoted.

Expertise: Get advice from professional, licensed, certified electricians.

Flexible scheduling: Ask about same-day service!

How to Choose a New Generator For Your Home

Whether you’re looking to use a generator at your home, workplace, or for a recreational vehicle, there are a few factors to consider:

The Different Types of Home Generators

There are plenty of home generator options to choose from, including whole-home standby generators; large, medium, and small inverters; portable generators, and more.

Whole-home standby generators: Many standby home generators are powered by natural gas, and switch on automatically in a power outage without requiring refueling.

Inverters: Inverters cover a wide range of uses and can power anything from a few appliances to a whole small house.

Portable generators: Portable generators usually offer the best value for your dollar, but are often limited in their output.

Generator Sizes

The size of the home generator that you choose to buy depends mostly on what you’ll be using it for.

If you need a home generator with capacity to power your entire home for prolonged periods during an emergency, then you’ll probably need what’s called a standby generator. These are permanently installed outside your home, and are generally the most expensive option.

Large and medium inverters are another good option if you’re only looking to power a few key appliances during a power outage.

Calculating the Amount of Power You Need

Your home generator should be able to power the combined wattage of all of the appliances you want running when the power goes out. Calculating exactly what wattage you need can be tricky, and is potentially dangerous if calculated incorrectly. The generator installation experts at Mainstream can help you decide exactly how much power your home needs with a personalized, home generator installation proposal.

Call the expert electricians at Mainstream to receive a comprehensive proposal for the perfect home generator for you!

Check out why your neighbors trust us to get the job done right

Great seasonal service!

Great seasonal service today on our furnace and air handler/AC unit. Matt Miller did a very courteous and professional job describing all that he was doing and did and made additional recommendations on future service and care. He was very knowledgeable and had great interpersonal skills. We have used Mainstream for other projects as well and have always been satisfied with the work performed. I can say with honesty that they have not always been the cheapest, but they have always been the best. 'Good service is not cheap and cheap service is not good.' If you ever need a plumber, electrician or HVAC specialist, I highly recommend Mainstream.
Greg A.


Cody was respectful, personable, courteous, answered all our questions we had during his visit, knowledgeable. Cody helped us get in touch of the appropriate people, to finance the work that our home needs. He helped get the work scheduled so that we wont need to wait longer to get the work taken care of.
Crystal N.

Highly Recommend

The entire team was very responsive and nice. Handled scheduling quickly. Process was clearly outlined at multiple points in the job to ensure expectations were being met. Took 48 hours from time I reached out to complete issue resolution. Highly recommend
Jenn C.


Jaymin was very professional and friendly. Was knowledgeable and got right down to business. Did a great job! He deserves a KUDOS!! 👍 Daryl was also very professional and friendly. He was knowledgeable and explained the problem very clearly. He's also a good salesman! KUDOS to him, as well!! 👍
Judy W.
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Schedule a Home Generator Installation

Schedule your home generator installation cost estimate today to ensure your home’s electrical grid is running smoothly, protecting you all year long!

Special Offers in Spokane Valley, Washington

Upgrade to Cozy: Score Up to $1500 Trade-In Credit & Warm Up with Payments From $87/Month!

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Plan 2740. 1. Subject to credit approval. 2. Loan term is 120 months at fixed rate of 9.99% APR. For example, assuming the full credit limit is used on loan approval date, for every $1,000 financed at 9.99% APR, 120 monthly payments of $13.21. This example is an estimate only. Actual payment amounts based on amount and timing of purchases. Call 866-936-0602 for financing costs and terms. Financing for the GreenSky® consumer loan program is provided by Equal Opportunity Lenders. GreenSky® is a registered trademark of GreenSky, LLC, a subsidiary of Goldman Sachs Bank USA. NMLS #1416362. Loans originated by Goldman Sachs are issued by Goldman Sachs Bank US A, Salt Lake City Branch. NMLS #208156. [www.nmlsconsumeraccess.org](http://www.nmlsconsumeraccess.org/). Valid only for residential customers. Not valid with any other offers, discounts, or on prior sales. Offer valid only on units purchased directly through Mainstream Electric, Heating, Cooling, & Plumbing. Trade-in must be processed with our team to qualify for the bonus.
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Valid only for residential customers. Not valid with any other offers, discounts, or on prior sales.