r/Generac_Generators

We have a guardian series 10 KW generator, with an RTS transfer switch. Our battery maintainer was failing for years before I finally diagnosed it, despite a handful of texts not being able to tell me why we were eating batteries multiple times a year.

I put in guest charge Pro battery maintainer but that just died also.

I realized the battery maintainer also Powers the 12 volt bus inside the transfer switch.

I was thinking to install a good quality outdoor battery maintainer at the generator, cut the line between the generator and the transfer switch, and put in a replacement OEM maintainer inside the transfer switch to keep its 12-volt bus active.

Thoughts??

Generac sent me the wiring diagram a few years ago that I'll dig out but I'm not sure if I can decipher that on my own

Does anyone know this.

There have been many cases where the Chinese knock off spark plugs are interfering with the electronics within the generator and causing all sorts of error codes, including failure to run.

I broke open one of these so called resistor plugs….there are no resistors within the plug.

Some customers have tried replacing entire controllers only to find the spark plug is causing the issue.

Stick with USA manufactured Champion plugs as specified.

Generac certified tech here…..