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Avatar for Greens Electrical
Greens Electrical
5.0(
26
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Woodruff, SC and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Mr. Green TRULY puts the customer first! He installed a whole house generator for me last August and called to check on us 6 months later because bad weather is coming. Brought me a key and showed me (again) how to add oil. I had several estimates and he beat other prices by several thousand $ AND he installed a bigger generator! I will definitely hire him again and recommend him to every one!! 5 star service *****!!"
Additional Photos
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+1

Response time1 day
Response rate100%
5 neighbors recently requested a quote
Avatar for U.S. Energy Solutions
U.S. Energy Solutions
4.7(
74
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+4 more

Serving Woodruff, SC and surrounding areas

Approved

In business since 2015

Warranties offered

Credit card accepted

"These guys did a great job! I was called within 1 minute of requesting quotes for this job. I was given a reasonable quote promptly. Within a few days the unit was installed and is working wonderfully. I have to point out the technician that did the install. Josh was courteous and professional at all times. He stayed in contact with me thru the whole process. I would absolutely recommend this company and will to any of my neighbors that have such needs."
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Roof Installation 3rd day

+1

14 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for US Energy Solutions, LLC
US Energy Solutions, LLC
4.8(
146
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Woodruff, SC and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"We had an electric vehicle charging station installed. They handled permits and everything necessary to complete this project. Richard provided excellent communication and was very responsive to input. Overall a great experience that exceeded expectations."
Roof Mounted Solar System
Solar Battery Energy Storage
Solar Battery Energy Storage
Heat Pump
Air Conditioning Unit

+6

Response time10 hrs
Response rate92%
4 neighbors recently requested a quote
Avatar for Surge Electrical Contractor, LLC
Surge Electrical Contractor, LLC
4.7(
19
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Woodruff, SC and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Serge and Reuben were very kind and professional. They showed up on time, managed the permits and inspections in record time. AND got the power company in my area on board in record time also! This in the middle of storm damage all over our town! When there were some issues with wiring (as there always is in a house built initially in 1940 and added to in no apparent plan, quirky but cool!) Serge explained them to me and we came up with a plan and though he could have, didn't charge me for the extra effort. We discussed some future projects as the remodel goes forward and he ran wires for them so it will be a go when we get there. I couldn't have asked for better service, better communication, better replacement equipment and better understanding when I wanted to change things on the fly. He will be my go to guy for all future projects and I would recommend him highly and plan to with everyone I know. He does commercial and residential and is truly a part of the pro family now"
Response time6 hrs
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Homeland Electric LLC
Homeland Electric LLC
5.0(
18
)
Portable Generator - Install

Serving Woodruff, SC and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"Matthew installed a new sub panel box for us. His work was thorough and fast. The finished job looked great and worked perfectly. He also installed recess lighting for us. Again another job very well done. Not only is he reliable and does a great job but he's also personable and very kine. We highly recommend Matthew with Homeland Electric"
Response time12 hrs
8 neighbors recently requested a quote
Avatar for Besters Electrical
Besters Electrical
5.0(
6
)
Fixed Generator - InstallPortable Generator - Install

Serving Woodruff, SC and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"Bay and his crew were outstanding from start to finish. Bay communicated clearly, provided a fair and transparent quote, and showed real integrity throughout the project. Logan and Gino were equally impressive—an engaging, highly capable crew who made the work feel smooth and well organized. They were very flexible when my plans changed from replacing two light fixtures to installing ceiling fans with light dimmers. They also decommissioned and safely capped an existing light-fixture junction box, then installed a new electrical box, wiring, and mounting hardware for a pool table light fixture in a different location. The result looks great, allowed the pool table to be installed the next day and I’m very happy with the whole experience. I’ll absolutely be reaching out to Bay and his team for additional work already planned down the road. Highly recommend! Spot on experience."
1 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.

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. 

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

The Woodruff, SC homeowners’ guide to generator installs

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