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Avatar for Current Electric Company
Current Electric Company
4.7(
140
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Caledonia, WI and surrounding areas

Approved

In business since 1983

Emergency services offered

Credit card accepted

"Current Electric helped us tremendously with our Electrical Box upgrade. We first wanted our power line to be placed underground and Current Electric helped us with the logistics with contacting the electric company. Second, when it was time for the installation to happen, the technicians came on time, worked diligently, and cleaned up after the project was completed. I would hire them for any of our future projects."
Kitchen Remodel
Landscape Lighting
Restaurant Lighting
Lighting in newly built hotel
Commercial Solar

+2

Response time1 day
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Milwaukee Electrical
Milwaukee Electrical
5.0(
2
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Caledonia, WI and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Elliott does great work for a great price. He installed a new 100 amp breaker box and updated some of the house wiring to accommodate the new service. He also wired the newly renovated basement with all the wiring and installed all the outlets, switches and drop ceiling LED lights that have dimmer capability. He is meticulous in what he does."
Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Ls industrial repair
Ls industrial repair
5.0(
2
)
Portable Generator - Repair

Serving Caledonia, WI and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

"He showed up in a timely manner. He did the job quickly. There was a shorted wire that he had to re-run and pull through the existing pipe. So far it's all working great and has not needed to return. So far everything working great."
Avatar for Witty Property Solutions
Witty Property Solutions
5.0(
3
)
Portable Generator - Repair

Serving Caledonia, WI and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

"We were very pleased with the caulking and painting work Alex recently did for us. The caulking work was near perfect, and the thorough prep work before painting was notable. He went out of his way to guarantee our satisfaction with our painting project. We have no reservations recommending Alex and would hire him again."
Tosa Kitchen Refresh
5 neighbors recently requested a quote
Showing 1-10 of 27
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.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

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.

The Caledonia, WI homeowners’ guide to generator installs

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