Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Backup Power
Power that stays on, even when the grid doesn't.
Spokane and Coeur d’Alene see windstorm, ice-storm, and wildfire-related outages multiple times a year — and the trend is going the wrong direction. Whole-home generators and battery backup systems keep the lights on, the heat running, the fridge cold, and the sump pump pumping when the grid goes down.
We install standby generators from Generac, Kohler, and Briggs & Stratton, plus battery systems from Tesla Powerwall, Enphase, and Franklin. Auto-transfer switches kick in within seconds of a power loss — no flipping breakers in the dark. Residential and commercial in Washington and Idaho.
- Licensed in WA & ID Washington and Idaho licensed, bonded, and insured — residential and commercial.
- Stocked trucks Breakers, switches, outlets, wiring, and diagnostic gear on board for one-trip repairs.
- Flat-rate quotes Approved before any work — never charged by the hour.
- Warrantied work 1-year labor warranty plus full manufacturer parts coverage.
When It Makes Sense
Common reasons to add backup power
Not every home needs backup power. These are the scenarios where it pays back:
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Frequent outages
3+ outages a year is the threshold where backup power starts paying back.
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Heat-dependent household
Heat pumps, electric furnaces, and boilers all stop in an outage — backup matters in winter.
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Sump pump dependency
Spring storms that knock out power are exactly when sump pumps are needed most.
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Medical equipment
Oxygen concentrators, CPAP, dialysis — uninterrupted power isn't optional.
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Work-from-home
Lost productivity from outages adds up — and a generator pays back fast for remote workers.
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Wildfire-zone home
PSPS (Public Safety Power Shutoffs) increasingly common — backup power = real resilience.
What We Install
Backup power systems
Generators, battery, and restoration service — sized for your household and properly transferred to your panel.
- Home Battery Backup Tesla Powerwall, Enphase IQ Battery, and Franklin Home Power — silent, fume-free, indoor or outdoor.
- Home Generators Whole-home standby generators from Generac, Kohler, and Briggs & Stratton — natural gas, propane, or diesel.
- Power Restoration Post-outage diagnostics — restore power to circuits that won't come back, identify damaged equipment, and verify safety.
- Automatic transfer switches Whole-home and managed-circuit transfer switches that engage backup power in seconds.
- Smart panel integration Pair with Span or Lumin smart panels to manage circuits and extend battery runtime.
- Solar + battery Battery systems compatible with existing or new solar installs for full grid independence.
- Generator maintenance Annual maintenance, oil changes, and load testing to keep your generator ready.
- Commercial backup Commercial-scale generators and transfer switches for restaurants, offices, and multi-family.
How It Works
A backup-power install, start to finish
Most generator installs take 1–2 days. Battery installs are typically 1 day.
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Free home assessment
Load calc, fuel-supply review, and location options for the generator or battery system.
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Fixed-price quote
Equipment, install, fuel hookup, transfer switch, and permitting — all in writing.
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Install
Pad poured (when needed), equipment mounted, gas/electrical connected, transfer switch installed.
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Test & walk-through
We simulate a power outage to verify the system kicks in — then walk you through controls.
Current Specials
Save on the work your home needs most.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
Power out? Keep it on next time.
Same-day service across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Ricky Saldana the technician that came out was fantastic. He was so knowledgeable about my plumbing issues and his recommendations were spot on. He was on time and very pleasant to work with. I would highly recommend him for any plumbing work that needs to be done.
Thanks Ricky for all of your input.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Backup Power — Frequently Asked Questions
Generator or battery?
Generators handle longer outages (days) and unlimited runtime if you have a gas connection — but they’re loud and require maintenance. Batteries are silent, fume-free, and integrate with solar — but runtime is limited (4–24 hours typical) without solar recharge. Hybrid solar+battery+generator systems give you all three.
How long does an outage have to be for backup to pay back?
Depends on what you’re protecting. For most homes with frequent outages and a freezer full of food + a sump pump, the payback is just one or two big outages. For homes with medical equipment, the math is irrelevant — uninterrupted power is the requirement.
What size generator do I need?
Depends on what you want to run. A 14kW generator handles essentials (fridge, furnace, lighting, sump pump) for most homes. A 22kW handles essentials + AC + electric range simultaneously. We size based on your actual loads, not a generic recommendation.
Can I install a generator myself?
No. Standby generator install requires a licensed electrician for the transfer switch and a licensed plumber for the gas connection. We handle both in-house. DIY installs typically fail inspection and may void your home insurance.
Do you handle commercial backup power?
Yes. Commercial generators and transfer switches for restaurants, offices, multi-family, and light industrial in both Washington and Idaho. Documented installs for compliance and insurance records.
Is the work warrantied?
Every install includes a 1-year Mainstream labor warranty plus the manufacturer warranty (typically 5–10 years on generators and 10-year on batteries).
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
