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Avatar for Southern Power Systems, LLC
Southern Power Systems, LLC
4.9(
86
)
Fixed Generator - InstallFixed Generator - Repair

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Randy Hamrick(owner) was very thorough answering my questions and follow up. The installation crew was pleasant and efficient. Generator installation was completed on the date promised."
Generator Installation
Generator Installation
Generator Installation
Generator Installation
Generator Installation

+2

Response time2 days
74 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for M.J. Power LLC
M.J. Power LLC
5.0(
18
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

With over a decade of experience, we offer licensed and fully insured electrical services that prioritize both expertise and reliability. We ensure the highest standards of craftsmanship, delivering top-quality workmanship in every project we undertake. Clients can rest assured knowing that their electrical needs are in capable hands, providing them with peace of mind and confidence in the safety and efficiency of their electrical systems.

7 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Lightning Bug Electric
Lightning Bug Electric
4.7(
502
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Berkeley Lake, GA and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Free estimates

Emergency services offered

"We chose Lightning Bug Electric to install a backup generator for our house because Lightning Bug had handled some electrical work for us in the past, and we liked their service. Sean and Dustin installed our generator and we could not be more pleased with our experience. They were totally accommodating to our needs and schedules, installed the generator and completed their work with a minimum of disruption to us. They answered all of our questions and were extremely knowledgeable. When we had a minor glitch with our water heater, Sean made sure that we were taken care of promptly on a Saturday morning! We look forward to continuing our relationship with Lightning Bug-- they are definitely our go-to guys!"
Undercabinet lighting to code!
Up Lighting and recessed lighting
Landscape lighting
Surround your pool to give a great ambience for social gatherings.
Light up dark pathways for safety and beauty!

+5

Response time1 day
36 neighbors recently requested a quote
Recommended by90%of homeowners
J & K Electrical Contractors, LLC
4.6(
12
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 1996

Free estimates

Credit card accepted

"We hired them last year to install a motion detector over our garage and to disconnect an outdoor junction box and wiring used by the previous owner. They did a great job and were very courteous. They were very responsive to our request and scheduled the appointment for the next day."
Response time2 days
Recommended by90%of homeowners
Avatar for Dependable Electric Service, LLC
Dependable Electric Service, LLC
4.4(
415
)
Portable Generator - Install

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Came in, got straight to work. Lights looked amazing. Only problem was they wouldn’t patch 2 small holes from removing old fixture. I took care of it no problem but it would be common courtesy to take care of that for your customer. Other than that, honestly the guys were extremely professional. He wanted to make sure my lights lined up with existing fixtures so in an event I ever changed it, it could match and looked uniformed to the ones installed. I’d definitely use them again for sure."
Panel Change out
Detached Bar from House
Auto Transfer Panel for Back up generator
Movie Theater
Movie Theater

+62

Response time5 hrs
Response rate92%
1 neighbors recently requested a quote
Avatar for Britebox Electrical Services
Britebox Electrical Services
4.4(
37
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Berkeley Lake, GA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Customers say: Super punctual

"Three light fixtures installed to existing wiring, less than an hour to survey work, perform task, and do paperwork...$387...Really surprised my elderly parents and me...Just found out through this experience, they have taken over the electrical for Ragsdale Heating and Air, liked it better when Ragsdale did their own electrical...So buyer beware when dealing with this company."
Response time1 day
8 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for TE Certified, Electrical, Plumbing, Heating & Cooling
TE Certified, Electrical, Plumbing, Heating & Cooling
4.7(
129
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 2003

Small jobs welcome

Credit card accepted

"We hired TE to install an outlet under our kitchen sink. I was worried there might be complications with the counter and cabinets in the way but everything went smoothly and Kyle did a great job with the outlet! I would hire them again for any additional electrical work we needed."
Recessed Lights
Chandelier
TE Electrician
Kitchen Lights
Pendant Lights

+5

6 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Atlanta Master Electricians
Atlanta Master Electricians
5.0(
9
)
Portable Generator - Install

Serving Berkeley Lake, GA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Excellent Work! Prompt and professional. I've used Atlanta Master Electricians several times and they never disappoint. I highly recommend for your electrical needs - indoor and outdoor."
Foyer Lighting
Bathroom Lighting Contemporary Upgrade
Dining Room Lighting Upgrade
Bathroom Mirror Lighting Upgrade
Chandelier Foyer Lighting

+7

Response time10 hrs
6 neighbors recently requested a quote
Recommended by88%of homeowners
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Generator Install questions, answered by experts

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

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.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

The Berkeley Lake, GA homeowners’ guide to generator installs

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