Compatible With Generac Nexus™ or Generac R200 Controllers •Leverages digital load management (DLM) technology •Ability to manage 2 A/C units with no additional hardware •Intelligently manage 4 more loads w/ additional DLM modules •DLM Module P/N: 5937 (Sold Separately)
Service Entrance Rated •Installs between main meter and service panel •Contains load side and line side disconnecting breakers
NEMA 3R Indoor/Outdoor Rated •Aluminum, wall mountable weather-proof enclosure •Electrostatically applied and baked powder paint (Gray)
Q: Will this transfer switch work with Generac 16kw generator #5254? by Stefan from Pennsylvania on May 14, 2012
A: This switch will work but you would require a special kit to connect to the battery charger. This kit would have to be installed by a certified Generac dealer.
These kits are available from your local Generac dealer - Part Number: OH93030SRV.
Q: I have a 1980 Onan 33 KW single phase or 50 KW 3 phase diesel generator. I want to connect it to my house, which has 200 amp service. Can I use the RTSD200A3 ? There is 50 . ODDB - 15R/22956E on the model plate seriial is K800536055
The generator was just taken out of service, and they kept the transfer switch. by Howard Todd from Maryland on July 24, 2011
A: You can only connect Generac transfer switches with Generac generators. They do not control the on/off functions of a generator. We do not offer any aftermarket transfer switches that offer this option. Sorry.
Q: What is the difference between the Generac Nexus Smart Switch (100 Amp) automatic transfer switch for $349 and the Generac Nexus Smart Switch (100 Amp) automatic transfer switch (Service Entrance) for $499?
Thank you for your time and consideration. by Cecil Camune from Illinois on January 29, 2011
A: The "Service Entrance" type automatic transfer switch has a built in shut off switch to power can be turned off to perform service on the generator without backlash from utility power. This type of switch is normally required by code to be installed if used in a whole house application and mounted between the meter and electrical panel being powered.
The "Standard" type automatic transfer switch does not include this service entrance feature and is normally installed when the generator is powering a sub-panel. by Jim, Product Expert
Overall Rating
5.0
(Based on 4 Reviews)
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Jim Baugher, Product Expert Electric Generators Direct
Jim's Recommendation
The new Generac RTSD200A3 is the same automatic transfer switch that comes standard with the best-selling Generac 5875 smart circuit standby generator system. It is similar to our good recommendation but is 200 Amps instead of 100 Amps.
This "Smart Switch" is unique because it comes equipped with two Digital Load Managers (DLM) already built-in to control two standard AC units.
Best of all, if you have multiple high-voltage appliances, your electrician can install up to 4 more separate DLMs (total of 6) to protect your generator system from overloading. This is a separate accessory you will need to buy.
The separate DLM modules are used to alternate two high-voltage appliances - like electric water heaters or well pumps. It basically allows you to energize your entire electrical panel - not just essential circuits.
This 200-Amp automatic transfer switch is service entrance rated. In simple terms, your electrician installs it between the meter and main electrical panel, which is a much easier and usually cheaper installation.
December 21, 2011
JAMES Fredericksburg, VA
Complicated Install Due To Home Design
My installation was quiet complicated. Electrician asked that I order a second Nexus Panel since my house had 2- 200 amp panels. He explained this would make for a cleaner installation. The Nexus panels had to be located on the exterior of the house requiring drilling several huge holes through brick. Because of my electrical room being located in the garage on a concrete slab the wiring from the generator was run through the basement up into my electrical room. Gas hook up was less complicated.
Have not needed unit yet. Would caution buyers to be aware of the large amount of propane these units use. I have a 500 gallon tank and the installer recommended installing another 500 gallon tank or upgrading to a single 1000 gallon tank. I did not do so.
My installation was quiet complicated. Electrician asked that I order a second Nexus Panel since my house had 2- 200 amp panels. He explained this would make for a cleaner installation. The Nexus panels had to be located on the exterior of the house requiring drilling several huge holes through brick. Because of my electrical room being located in the garage on a concrete slab the wiring from the generator was run through the basement up into my electrical room. Gas hook up was less complicated.
Have not needed unit yet. Would caution buyers to be aware of the large amount of propane t... more
March 12, 2011
Gregg Frankston, TX
It Went Flawlessly
My neighbor and I installed the entire system after the generator was delivered to the slab. We found the installation instructions easy to follow. We had a certified installer check-out our installation and commission the unit. It went flawlessly.
July 29, 2010
Travel Alot Southern, TX
Good so Far
I researched a lot of generators and decided to purchase the 5875 20KW air-cooled model with the Nexus smart controller/switch. The reason I settled on this decision was based on very competitive price, plus the smart switch allows this generator to handle the power needs of an entire large house.
You need to purchase a transfer switch for a standby generators, and for many generators this is a separate additional cost for this generator the switch is included.
Basically this generator and the included Nexus transfer switch will supply power to the entire panel (200 Amps) of your home. Some large homes will potentially exceed the power needs of this 20KW generator. For most homes, the major power eaters are the AC units.
I went around my house with a Kill-a-watt meter which measures the amperage draw of things that you plug in. When you first plug something in, it normally consumes a higher amperage and then settles to a lower stable current draw.
I also found on the Internet the estimate for current draw for AC units per ton of cooling capacity (sorry, can't recall what it is at the moment). Bottom line is that I calculated that the total peak current draw for my house would likely exceed the approximate 70 AMP generator output (I use NG for LP the output is 83 amps).
This is the beauty of this generator- you can wire it so that two AC units (I have two units one 4 tons and one 3.5) can be individually controlled and "shed" so that in the event that the current draw exceeds the generators capacity, it will automatically not supply power to one or both units.
Other generators that do no have this feature will simply shut down requiring a manual restart. Once power needs drop sufficiently, the Nexus Smart Switch will automatically supply the AC units again. I think this is really cool, and gives me confidence that the system will be able to handle any situation automatically.
I got three estimates for installation of the generator from electricians. The range was quite startling. The highest was $5900, and the lowest was $1125. All of the electricians had done standby generators, but none had installed one with the load-shedding Smart Switch.
They all commented that the Smart Switch was really a cool feature. Let me point out that that I am not especially handy around the house. I can replace a plug fixture, but that is about it. Some people can supposedly install a generator themselves, but this is not a project I could possibly do. Unless you have some electrical experience, Iwould recommend NOT attempting to do this yourself.
The generator arrived when I was at work, but the truck driver lowered the generator and did actually have a dolly and took it down to my driveway (not always the case) at the request of my girlfriend.
I hired the electrician (from a large company with AC division/commercial division/electical division) who gave the $1125 estimate and gave me confidence he knew what the project entailed and understood the Smart Switch installation.
I watched the entire installation. Once again, it is NOT something that an average person could/should do in my opinion. There were two people from the company, and they completed the entire project from wiring to testing is about 10 hours total.
Plumbers had to come out to install the gas line to the generator, and this also is a separate charge. Be sure to check if you have a gas line located close to the generator, and if you have the pressure and capacity to handle the generator.
To my surprise the generator started and both AC units came on without problem. The electrician told me the power draw off the generator was 60 amps (within the capacity). They left and the people from the AC division of the company arrived.
Please note that wiring for the AC units to the Smart Switch was not included in the estimate, and Ii still have not gotten the bill for this. This turned out to be more involved than I anticipated. Two guys had to run wires from the inside air-handling units to the smart switch. This involved going into the attic. Total time was about 4 hours to do this (so yes, the bill might surprise me).
I still have not tested the 'shedding" function of the smart switch (Tried turning on every light in the house and the generator still had the capacity to handle both AC units.) Next thing I will do is to plug in three 10AMP vacuum cleaners, and turn on a window AC unit, and make sure the pool pump in on, to see if the Smart Switch will automatically divert power away from one or both main AC units.
After the first day, I got a "low battery" warning light, so I took out the new 12V battery to the place I bought it, and they tested it and told me it was fine. I reinstalled the battery and the next day, the generator had a low voltage red warning light.
I called Generac and they asked me if the "G1 leg" was connected, and I had no idea what they were talking about. This apparently is the wiring for the generators trickle charger for the 12 volt battery, and if it is not connected, the battery will not charge.
They told me that this is something that installers have not been doing. I called electrician, and was told that they are aware of this issue and will return to correct the situation.
EGD RESPONDS: Please check your local ordinance and building codes; some areas require that installation be done by licensed electricians & plumbers.
I researched a lot of generators and decided to purchase the 5875 20KW air-cooled model with the Nexus smart controller/switch. The reason I settled on this decision was based on very competitive price, plus the smart switch allows this generator to handle the power needs of an entire large house.
You need to purchase a transfer switch for a standby generators, and for many generators this is a separate additional cost for this generator the switch is included.
Basically this generator and the included Nexus transfer switch will supply power to the entire p... more
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