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Top-Rated Generator install pros in Caldwell - Updated Nov 2026

Avatar for RAP Electric Co., Inc.
RAP Electric Co., Inc.
4.6(
137
)
Portable Generator - Install

Serving Caldwell, NJ and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Roy is really a prof. He installed two overhead fans and a hanging lamp. The fans had a complicated control system but he was able to get them to work flawlessly. Bonus: he is really a nice person and he cleaned up too! I would recommend his work to anyone."
Response time2 hrs
Response rate93%
Recommended by90%of homeowners
Avatar for A Team Electrical Contractors Corp.
A Team Electrical Contractors Corp.
4.6(
65
)
Fixed Generator - InstallFixed Generator - Repair

Serving Caldwell, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Next time I will ask only him to do the work in my multiple house and will recommend him to all my friends. In 3 days the work was done perfectly and the price was reasonable. Big thanks. Diana."
Service Upgrade
Generator
Service Upgrade
Generator
Service Upgrade

+141

Response time1 day
3 neighbors recently requested a quote
Recommended by100%of homeowners
Schweiger Electrical Contracting, LLC
4.7(
78
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Caldwell, NJ and surrounding areas

Approved

In business since 2015

Free estimates

Customers say: Quality work

"Frank and his team did a fantastic job upgrading our electrical panel and wiring for our generator. He even came out to help us during off hours when we needed help with starting the generator! He is quick to get back and does above and beyond. I highly recommend and will use his company again and again!"
Response time5 hrs
Response rate87%
Recommended by94%of homeowners
Michael Bianchi LLC
4.7(
44
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Caldwell, NJ and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

We offer over 15 years of experience in the industry. At M Bianchi LLC, we combine technical expertise with a customer-first approach. Our company provides complete electrical services—from upgrades and rewiring to lighting design, smart-home integrations, and commercial installations. We pride ourselves on honesty, craftsmanship, and fast, reliable service. Whether it's a small repair or a large project, you can count on us for safe, efficient, and high-quality electrical work.

Response time12 hrs
Response rate100%
13 neighbors recently requested a quote
Avatar for Pipe Works Services Inc
Pipe Works Services Inc
4.4(
204
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Caldwell, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"Yes. On initial install technicians discovered new programmable thermostat was defective. Installed a temporary replacement and next day installed the permanent thermostat and walked us through setting up app and Siri and Alexa ."
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+93

16 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for First Wave Electrical
First Wave Electrical
4.7(
55
)
Portable Generator - Install

Serving Caldwell, NJ and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"A+ for being prompt, accurate on time and on the scope of work. I did request to install needed equipment to run the generator and my house had some non-standard situations. I love that all challenges were solved in the right way, not the fast way. The electrician was very open-minded for debating on the possible approaches to an unexpected situations, etc. I love the work, very rational pricing and I would hire again."
Response time6 hrs
Recommended by96%of homeowners
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Generator Install FAQs, answered by experts

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

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. 

The Caldwell, NJ homeowners’ guide to generator installs

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