Backup Generator Backup

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wirenut25

Member
I have a customer who wants to be able to backup (in case of flooding) their existing 18kW LP Generac. This would most likely be a diesel rental unit with roll out connections. I want to install a MTS outside next to the Generac unit with male connections to re-feed back into the building. I've contacted Generac and they told me this may interfere with he communications and they do not recommend. However customer is adamant about the installation.
Honestly I don't love the install idea either.
First has anyone come across this type of design before?
Secondly would the portable backup need fused protection?
Thanks for any help
 
If the portable will be manually started, then an MTS would be fine as the autostart to the Generac would just start a machine that has no power connection. They can turn the Generac off when the transfer the MTS so the control circuit will start nothing.
 
There is no problem with what you want to do. If the Genercrap is flooded, it would be turned off, the issue would be power would be sent back to the generator sense and charge circuits even though the generator is turned off if the manual switch is before the Generac ats. You would need the manual transferswitch after the Generac transferswitch.
 
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