Generators & Backup Power
Standby power sized, fueled, and switched over before the lights go out.
- 20+
- Years in Business
- 100%
- Licensed & Insured
- 2000+
- Projects Completed
Power when it drops
Multiphase Electric provides complete generator and backup power solutions for residential and commercial properties. We design systems around the power needs of the property, whether the goal is whole-building backup, selected loads, or critical circuits only.
Our services include permanent standby generators, portable generator connections, automatic transfer switches, battery backup systems, load calculations, electrical installation, and coordination of the complete backup power system.
Generac Generators
As a Generac dealer and certified installer, Multiphase Electric provides Generac generator solutions from initial system design and sizing through installation, startup, and final commissioning.
We also service and maintain Generac generators, including annual maintenance to help ensure the system is ready when backup power is needed.
What we offer:
- Backup power designed around your property’s needs
- Standby generators, transfer switches, and battery backup solutions
- Certified Generac design, installation, startup, and commissioning
- Service and maintenance to keep your system ready when needed
Certifications & Licenses:
Dealer & service
Electrical contractor
Backup work
Every install is load-sized, permitted, inspected, and serviced by the crew that set it.
Permanent Standby Generator Installation
Portable Generator Connections
Battery Backup Systems
Automatic Transfer Switch Installation
Manual Transfer Switch Installation
Whole Home Backup Power
Critical Circuit Backup
Generator Load Calculations
Natural Gas & Propane Coordination
Generator Maintenance Program
Generator Repair & Service
Commercial Standby Power
Why it starts
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Sized for the outage, not the brochure
A generator that can't carry the well pump and the furnace together is a generator you'll resent in January. We calculate the load first, then pick the unit.
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Changeover you don't have to be home for
An automatic transfer switch senses the outage, starts the generator, and moves the house over in seconds — no cords, no back-feeding, no being home to throw a switch.
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We service what we install
A standby unit that sits untested for four years is a decoration. Our maintenance program exercises it, changes the oil and filters, and catches a failed battery before the storm does.
Sized on a real load, not on square footage.
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On-site sizing & fixed quote
We walk the property, agree what has to stay on — whole home, part of it, or the critical circuits — and size the unit against a real load calculation. The quote is fixed, and it covers the pad, the gas run, and the switch, not just the generator.
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Permit pulled, gas and utility coordinated
We pull the electrical permit and coordinate the fuel supply, whether that is a natural gas run from the meter or a propane tank. Larger installs get the load documentation the plan reviewer wants.
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Install, test under load, inspection
Pad set, generator placed, transfer switch wired in, then tested under an actual outage so you watch it change over. We schedule the inspection and show you the monthly exercise cycle before we go.
Trusted by Homeowners & Businesses
proudly serving the Portland metro
Multiphase Electric covers the whole metro — from Hillsboro and Newberg out to Corbett, and south through Oregon City to Molalla. Licensed in Oregon, with emergency service anywhere on this map.
- Portland
- Tigard
- Gresham
- Beaverton
- Clackamas
- Hillsboro
- Milwaukie
- West Linn
- Canby
- Lake Oswego
- Wilsonville
- Dundee
- Corbett
- Molalla
- Newberg
- Fairview
- Troutdale
- Oregon City
- Sellwood-Moreland
- Tualatin
- Bethany
- Beavercreek
- Damascus
- Estacada
- Sandy
- Portland, Multnomah County
- Tigard, Washington County
- Gresham, Multnomah County
- Beaverton, Washington County
- Clackamas, Clackamas County
- Hillsboro, Washington County
- Milwaukie, Clackamas County
- West Linn, Clackamas County
- Canby, Clackamas County
- Lake Oswego, Clackamas County
- Wilsonville, Clackamas County
- Dundee, Yamhill County
- Corbett, Multnomah County
- Molalla, Clackamas County
- Newberg, Yamhill County
- Fairview, Multnomah County
- Troutdale, Multnomah County
- Oregon City, Clackamas County
- Sellwood-Moreland, Portland, Multnomah County
- Tualatin, Washington County
- Bethany, Washington County
- Beavercreek, Clackamas County
- Damascus, Clackamas County
- Estacada, Clackamas County
- Sandy, Clackamas County
© CARTO, © OpenStreetMap contributors
outage questions
What people ask after the last outage and before the next one. If yours isn't here, call and we'll talk it through.
What size generator do I need?
It depends on what you want running. Critical circuits only — furnace, fridge, well pump, a few outlets — is usually a smaller air-cooled unit. Whole home, including air conditioning and an electric range, takes considerably more. We run the load calculation as part of the estimate rather than guessing from square footage.
What's the difference between a standby generator and a battery backup?
A standby generator burns natural gas or propane and can run for days, which is what you want for a long winter outage. A battery is silent, needs no fuel, and covers hours rather than days — good for short outages and for pairing with solar. Some homes end up with both, and we install either.
Can you connect the portable generator I already own?
Yes. We install an inlet and a transfer switch so you plug the generator in at the wall and throw one switch, instead of running extension cords through a window. It is far cheaper than a standby unit and it eliminates the back-feeding that kills people every storm season.
Do I need a permit for a generator?
Yes, and we pull it. A generator install is a service change — new transfer switch, new circuits, often gas work — and Oregon requires it permitted and inspected. We schedule the inspection and hand you the paperwork.
Natural gas or propane?
If you already have gas at the house, natural gas is usually simpler — no tank, no refills, and it keeps running as long as the gas line does. Propane is the answer where there is no gas service, and it stores well. We coordinate either, and we'll tell you which is cheaper for your lot before you commit.
How often does a standby generator need service?
Annually, plus the weekly or monthly self-exercise cycle it runs on its own. Oil, filters, plugs, and the starting battery are what fail, and the battery is what most often turns a generator into an expensive lawn ornament. Our maintenance program covers all of it.
How loud is it, and where can it go?
A modern air-cooled standby runs around the volume of an air conditioner and only under load or during its weekly exercise. Placement is set by code — clearances from windows, doors, vents, and the property line — and we work that out on the site visit before anything is ordered.
Other power work
All services
Lighting & Controls Design
Layout, fixtures, and control — designed on one contract, rebates included.
Data & Low Voltage Systems
Structured cabling, fiber, and cameras, run by the electricians.
Commercial Electrical Services
Ground-up builds, tenant improvements, and service upgrades — on the schedule you were given.
request your free estimate
Questions? Call (503) 908-1593