Multiphase Electric
Generac standby generator on a concrete pad beside a board-and-batten farmhouse, fuel line run into the wall behind it
4.9 40+

Generators & Backup Power

Standby power sized, fueled, and switched over before the lights go out.

(503) 908-1593
20+
Years in Business
100%
Licensed & Insured
2000+
Projects Completed
Meter, two Generac transfer switches and a gutter box on a lap-sided wall, with a standby generator on the driveway beside them

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:

Generac

Dealer & service

Oregon CCB

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

  • 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.

  • 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.

  • 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.

  1. 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.

    An electrician shaking hands with two homeowners in the entryway of their home
  2. 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.

    An electrician in a hard hat wiring a wall switch box, while a second fits pendant lights from a ladder behind him
  3. 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.

    A finished open-plan kitchen and living space, lit by recessed downlights and two glass pendants over the island

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, 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
Map of the Portland metro with every town Multiphase Electric covers marked, from Hillsboro and Dundee west to Corbett east, and south through Oregon City to Molalla.

© 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.

request your free estimate

Step 1. What can we help you with? It takes about two minutes.

What you need
Project Type

Questions? Call (503) 908-1593