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Avatar for Imperial electric
Imperial electric
5.0(
16
)

Serving Markham, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"The service guy came out very quickly. Had a smart thermostat installed. He walked me through setting up the app. Did a fast and a great job. I highly recommend this company if you want it done and done right."
154 neighbors recently requested a quote
Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,280
)

Serving Markham, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"Four Season service was awesome. The installers were friendly, professional, and knowledgeable. The installers cleaned up work area after they finished the job."
Additional Photos
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Response time9 hrs
28 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for M.T. Kelley Electric LLC
M.T. Kelley Electric LLC
5.0(
4
)

Serving Markham, IL and surrounding areas

Approved

In business since 1994

Warranties offered

Credit card accepted

"Hello, MTK electric was fantastic to deal with, their communication was top notch, they were very transparent about the entire process and the overall price was fair. Would definitely look for their assistance in the future."
Response time8 hrs
Response rate97%
6 neighbors recently requested a quote
Scardino Electric, Inc.
5.0(
3
)

Serving Markham, IL and surrounding areas

Approved

In business since 1970

Free estimates

Credit card accepted

With over 50 years of business serving the Chicago metro area, Scardino Electric, Inc., is the way to go for all your wiring and panel upgrade needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to do excellent work on every visit, answer all questions, and develop lasting relationships with all our clients so, that the next time service is needed, there will be no question on who to call. Contact us today for a free estimate. Satisfaction Guaranteed!

Response time11 hrs
Response rate100%
Recommended by100%of homeowners
Avatar for Ls industrial repair
Ls industrial repair
5.0(
2
)

Serving Markham, IL and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

At LSI repair we offer only the best and fair prices. We also specialize in heat treating furnaces but we cover a large array of services from residential to commercial from small to big.

3 neighbors recently requested a quote
Omar Santacruz
5.0(
1
)

Serving Markham, IL and surrounding areas

Approved

Hello homeowner/customer, my name is Omar Santacruz and I’m your local electrician, I have 5+ years of electrical knowledge and 10+ years of mechanical experience. When it comes down to any repair or fix please don’t hesitate to call and ask around, I will do my best to give you all details and break down costs regarding any upcoming projects, past repairs or even present emergencies. Feel free to reach out @(630)352-6190\nHope to get to work with you, God bless.\n\n¡Hola, propietario(a)/cliente!\nMi nombre es Omar Santacruz y soy su electricista local. Cuento con más de 5 años de experiencia en trabajos eléctricos y más de 10 años de experiencia en mecánica. Cuando se trate de cualquier reparación o instalación, no dude en llamarme o hacer cualquier pregunta. Con gusto le brindaré toda la información necesaria y un desglose claro de los costos relacionados con proyectos futuros, reparaciones anteriores o incluso emergencias actuales.\nNo dude en comunicarse conmigo al (630) 352-6190.

2 neighbors recently requested a quote
Avatar for MLP Electric LLC.
MLP Electric LLC.
5.0(
1
)

Serving Markham, IL and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time30 mins
Recommended by100%of homeowners
Avatar for 24/7 Services Inc.
24/7 Services Inc.
5.0(
1
)

Serving Markham, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

24/7 Services Inc. is a trusted, family-owned company providing comprehensive plumbing, sewer, and electrical services throughout the greater Chicagoland area. With a team of licensed professionals and decades of combined experience, we deliver fast, reliable solutions for both residential and commercial customers. Our services include emergency plumbing repairs, drain cleaning, sewer line repair and replacement, hydro-jetting, water heater installation, leak detection, sump pump service, and water filtration systems. We also offer full electrical services such as panel upgrades, lighting installation, wiring, troubleshooting, and generator installation. Available 24 hours a day, 7 days a week, we are committed to upfront pricing, quality workmanship, and dependable service whenever you need us most.

Project Photos
Avatar for GROMM Electric LLC
GROMM Electric LLC
New to Angi

Serving Markham, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Electrical professional with 20 years of hands-on experience in residential, commercial, and heavy industrial electrical construction. Raised in a family-owned electrical company that grew from a 10-person shop to a 500-electrician operation serving projects nationwide and internationally.\n\nExtensive field experience across high-demand environments including power plants, steel mills, paper mills, chemical plants, oil refineries, coal mines, Air Products facilities, and large food manufacturing plants.\n\nHighly skilled in:\n • Low-voltage systems, fire alarm, controls, and automation\n • Medium-voltage installations and power distribution\n • Underground services and excavation coordination\n • Bucket truck and service work\n • Smart home and modern electrical systems\n • Residential, commercial, and industrial construction from ground-up to retrofit\n\nCertifications & Credentials:\n • Chicago Licensed Electrician\n • OSHA 10 & OSHA 30\n • MSHA Certified\n • CPR Certified\n • NCCER Certified\n\n

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Generator Install questions, answered by experts

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup 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.

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.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

The Markham, IL homeowners’ guide to generator installs

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