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Verified Reviews for Generator Install pros in Gresham, OR

*The Angi rating for Generator Install companies in Gresham, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Gresham, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on April 21, 2026

Find Generator install pros in Gresham

Avatar for Woodline Electric
Woodline Electric
5.0(
54
)

Serving Gresham, OR and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Credit card accepted

Offers commercial services

"I used Woodline Electric to install a generator hookup. They were super prompt, professional and were always on the lookout to make it an economical install. Will be hiring them for future projects again!"
Response time2 days
Response rate87%
98 neighbors recently requested a quote
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Avatar for One Stop Electric LLC
One Stop Electric LLC
5.0(
36
)

Serving Gresham, OR and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"As we wanted a ev charger installed, they went out of their way to get us the correct one. They were prompt in installation and courteous in all interactions, fair and reasonable pricing. Would use again for electrical needs."
Kitchen Remodel
Response time10 mins
Response rate89%
7 neighbors recently requested a quote
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Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.9(
19
)

Serving Gresham, OR and surrounding areas

Approved

Super Service Award Winner

In business since 1974

Free estimates

Credit card accepted

"Ideal experience with this company! They contacted me and came out to make the bid the same day I contacted them. They were super flexible and worked to accommodate my schedule. I needed to wait until my EV charger arrived from the manufacturer. They came out the day after it arrived, installed the unit in under two hours, and it's been working flawlessly ever since. Don't let their name fool you--John's Waterproofing is expert at electrical work! I will use them again."
Water Puddle
Water Stains on the Walls
Full Perimeter Drainage and wall system
Room for The Home Appliances
Sump Pump and Battery Back up

+36

Response time6 hrs
Response rate91%
342 neighbors recently requested a quote
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Avatar for Wind River Electric LLC
Wind River Electric LLC
5.0(
9
)

Serving Gresham, OR and surrounding areas

Approved

In business since 1996

Free estimates

Credit card accepted

"Mike was fast, courteous, and explained everything very well in terms I understood. I could tell he definitely cared about his craftsmen ship and quality of work. I received top tier service and will be calling him again for any work I need completed. I would highly recommend Wind River Electric."
Kitchen upgrades
Kitchen upgrades
Kitchen upgrades
Kitchen upgrades
Kitchen upgrades

+1

1 neighbors recently requested a quote
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Avatar for Safety Home Services
Safety Home Services
5.0(
12
)

Serving Gresham, OR and surrounding areas

Approved

In business since 2009

Warranties offered

Credit card accepted

"did great work, installed all fixtures and fixed my outlets in the house that stop working as well!! very professional, friendly, and 100% would recommend to friends and family. thank you jarrod!!!!!!"
Our great service team at Safety Home Services. Excited to serve you!
We do the most simple to the most complex residential services. We are excited to serve you!
We are confident that we have what you need to fix your electrical issue!
Look for our trucks out there on their way to serve our customers!
We are excited to serve your electrical needs, whether small or big!

+5

14 neighbors recently requested a quote
Recommended by45%of homeowners
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Avatar for 3 Mountains Plumbing
3 Mountains Plumbing
4.2(
648
)

Serving Gresham, OR and surrounding areas

Approved

In business since 2000

Emergency services offered

Warranties offered

"The whole experience with 3 Mountains Plumbing was outstanding from Nicole at the office to Jon Marc and Peter, the plumbers. They originally scheduled me for an appointment 5 days out, but Nicole watched appointments carefully and moved my appointment to the same day I called. Jon Marc, the plumber, was very knowledgeable and professional. He gave me different options, which allowed me to decide what worked best for me. He even gave me a teacher discount. After installing my water heater at 8:00 p.m. at night, he discovered a manufacturing problem with the water heater. He called another plumber, Peter. Peter was going off shift and was at the office, but got another water heater and brought it to my house so Jon Marc could install it! I think other plumbers would have said that they needed to come back the next day, but Jon Marc stayed until 10:00 p.m. installing the water heater. I will never use another plumbing company because 3 Mountains is the best! Nicole, Peter and Jon Marc... Thank you!"
The 3MP Team (Circa 2017)
Bill Kerrigan
Alex Grabbing a Photo
Rolling Through Lake Oswego
Random Patch Photo

+103

Response time1 day
Recommended by92%of homeowners
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Grid Electric LLC
New to Angi

Serving Gresham, OR and surrounding areas

Approved

In business since 2023

Free estimates

Offers commercial services

We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We are ethical, honest, and easy to communicate with. \n\nCall us today you'll be pleased you did. Thank you\n

4 neighbors recently requested a quote
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Generator Install questions, answered by experts

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

The Gresham, OR homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.

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