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Avatar for A/C Benton Electric
A/C Benton Electric
5.0(
17
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Penryn, CA and surrounding areas

Approved

In business since 1984

Free estimates

Offers commercial services

"I was having a problem with my electrical panel the power keep flickering so I called Chris he came out the same day he drove all the way to Marysville and told me my whole panel needed to be replaced, needed to get a permit from PG&E so they came out the next day told me the main breaker needed replacing right away so I called Chris he came back out replaced the breaker even checked the rest of the breakers, clean the post and was done in about 10 minutes he even didn't charge me for the first time he came out. I would recommend Chris he is very courteous he arrives on time he will let you know if he's going to be late he is very affordable all around great guy."
Response time6 hrs
Response rate88%
Recommended by100%of homeowners
Avatar for Kingdom Current Electric
Kingdom Current Electric
4.8(
5
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Penryn, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Quick response time, great communication and extremely knowledgable with all things electrical. Kingdom current will be referred and hired by me in the future. The men that came out care about their work and went above and beyond to make sure I was satisfied. Thanks again, Kingdom!"
Electrical Work
Electrical Work
Electrical Work
Electrical Work
Electrical Work

+11

2 neighbors recently requested a quote
Avatar for Atomic Telecomm & Electrical Inc.
Atomic Telecomm & Electrical Inc.
4.5(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Penryn, CA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Joe is hard working, diligent, and honest. I hired him 1) to put up an antenna for local tv service and 2) to fix poor wifi signals. TV was converted from cable rapidly using leftover wires. Saving $ not paying for cable and streaming off wifi. Great signal strength! WiFi was harder. He worked with ATT to determine my new iMac was sucking signals. He installed a more powerful router that solved wifi issues when iMac is off. Now I have to work with Apple to figure out how to manage the computer searching. I would not hesitate to call Joe back again. He is an excellent technician and a fine person. He is pretty busy, so sometimes it takes a few days before he can come out, but he is worth the wait."
Network Switch and Router
Driveway Camera
Backyard Camera's
Front Yard Camera
NW corner of house

+9

Response time1 day
Response rate85%
Recommended by87%of homeowners
Avatar for Cool Electric
Cool Electric
5.0(
3
)
Fixed Generator - Install

Serving Penryn, CA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"I called Dan to install an outlet and he also found other serious problems with my house electrical. I have a much older home and was in desperate need of some electrical fixes. Dan was so nice and professional and very knowledgeable. He took the time to check everything out and really cared that things be right and things be safe. His price was very reasonable and I would definitely call him again and refer him to anyone."
Kitchen lighting
Response time12 hrs
Recommended by100%of homeowners
Avatar for Bodie Electric Inc
Bodie Electric Inc
5.0(
1
)
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business

Serving Penryn, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Hi there! My name is Jake and I am the owner of Bodie Electric. With over 15 years of electrical experience ranging from residential panel upgrades to $20M jobs at Levi’s Stadium and UC Davis; there is no job too big or too small! I specialize in Solar, Generators, Batteries, Panel Upgrades, and engineering for large scale projects. My goal is to be as many people’s electrician they can call for questions, help, pricing, and install. I am a single man crew that is licensed, bonded, and insured.

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

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.

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.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500–$2,000

  • Partial-Home Generators (9kW–20kW): $2,000–$6,500

  • Whole-House Generators (22kW–48kW): $5,000–$18,000

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

The Penryn, CA homeowners’ guide to generator installs

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