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As we explain in our recent article here about our unusually severe upcoming storm season "The season, backup generators aren't a luxury on the North Fork" and our earlier post, "Why the North Fork gets so many power outages and what you need to know about backup generators", due to the North Fork's 1940's-era, above-ground power grid (that's constantly being eroded by the salt air), even a little storm can knock out power to your home or business for a while.


The problem is compounded because finding compatible replacement parts for such an old system can slow down repairs and cause longer power outages.


This means generators are almost an essential piece of equipment in homes out here and we sell and install a LOT of generators

A time-lapse video of our team installing a 20,000 watt critical-load generator for a North Fork homeowner. Also, you might find owner Ben Dororski's post on generators helpful. It explains the state of the North Fork's fragile power grid and everything you need to know about backup generators on the North Fork.

As we explain in the article, generators don't have to be expensive. Plus, we offer payment plans and you often get a return on your investment the very first time you need to use them.

We exclusively carry Kohler backup generators. Unlike other brands we've carried, they hardly ever break down and when they do, they have a comprehensive warrantee. In fact, the Kohler warrantee and repair headquarters is based right on the East End and we have a good relationship with them. They remotely monitor their generators, regularly test them from afar, and come right out and fix them if they detect any issues, ensuring your generators work when you need them to.

Our most popular model used by customers on the North Fork is the 20,000 watt Kohler 20RCAL with Automatic Transfer Switch and OnCue Plus, which you can read more about elsewhere on this page. It'll power your essentials during an outage (heat, refrigerator, medical and office equipment).

We carry the entire Kohler generator line, so we have one for whatever your budget and needs are.

We also install these generators (or any other brand you might prefer). Installing them correctly can literally be a matter of life or death because when done improperly, the generator could easily be sending power out through your power lines to the street. Anyone on the poles repairing wires could get a lethal jolt of electricity. So you need someone like us who are proficient in insolating the power from the street with a transfer switch or a double throw switch.


Apart from the danger associated with not properly installing it, it needs to pass inspection to ensure there are no code violations. If you don't get the work inspected, when it comes time to sell the house, it will definitely raise red flags and you'll need to take care of it at that point, which can be much more expensive as new code regulations are written that call for more costly safety measures than are in place today.

At Custom Lighting of Suffolk, we take care of everything--helping you choose the correct generator based on your electrical needs, supplying the generator itself, installing it, getting it inspected and approved, and servicing it.


20 kW Generator

20RCAL with Automatic Transfer Switch and OnCue Plus

  • Model Number 20RCAL

  • Fuel Type Natural Gas, LPG

  • Phase Single Phase or Three Phase

  • ATS Included

  • Remote Monitoring Included

Popular generators for backup power, with an automatic transfer switch included. When you lose power during an outage or storm, a hard-working 20 kW KOHLER® generator keeps your appliances working, the heat or AC running and your security system on.*

  • Reliable.

    Every KOHLER® generator is equipped with a heavy-duty, commercial-grade engine that stands up to extreme weather.

  • Powerful.

    In just 10 seconds, your KOHLER generator automatically restores power to a 5-ton (60,000 BTU) air conditioner, major appliances and electronics.*

  • Premium warranty.

    We've got you covered with 5-year, 2,000-hour protection, and a corrosion-proof enclosure that's built to last.

  • Award winner.

    KOHLER generators have received several awards, including the Most Valuable Product (MVP) Award 2010 by Building Products magazine.


  • PowerBoost™ technology provides power to start large loads such as central air conditioners without dropping power to other appliances

  • Extraordinary peak motor-starting capacity: 14RCAL at 33kVA at 240V and 20RCAL at 41kVA at 240V

  • Premium power quality delivers exceptional digital voltage and frequency regulation along with low levels of harmonic distortion to protect sophisticated electronics

  • Powered by reliable KOHLER Command PRO® engine, designed and tested for tough commercial applications; with hydraulic valve lifters to eliminate need for lengthy break-in periods and expensive valve adjustments; operation speed is 3600 rpm (the standard for air-cooled generators)

  • Compatible with OnCue® Plus and OnCue® Plus Wireless Generator Management Systems, and Programmable Interface Module (PIM)

  • Also compatible with Load Control Module (LCM) or Load Shed kit with single-phase generators only


  • Comes with either an RXT 100-amp indoor-rated automatic transfer switch with 16-circuit load center or an RXT 200-amp outdoor-rated service entrance rated automatic transfer switch with load shed kit

  • RDC2 controller designed for today's sophisticated electronics manages both the generator set and Model RXT transfer switch functions

  • Quiet, neighborhood-friendly operation with sound levels similar to a typical central air conditioner

  • Stylish corrosion-proof enclosure impact tested to -30°F

  • Runs on either natural gas or liquid propane (LPG) with simple switching between natural gas and LPG in the field

  • Streamlined installation, simple terminal block for easy field connections. Kohler also offers concrete mounting pads to lower installation costs and time.

*Based on generator and load size.

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