In article ,
"Danny D." wrote:

Smarty wrote, on Thu, 18 Dec 2014 21:45:09 -0500:

As Trader correctly states, the battery is charged whenever the main AC
power to the generatyor is present, not when the generator is running.

I just re-read the manual and there's nothing, either way, about
the charging circuit for the battery.

It should be described in the weekly "exercise" or "battery maintenance"
sections, but it's not.

Also, if there is a charging circuit, it's not obvious in the schematic
diagrams. If there is the requisite 240VAC to ~15VDC "charger", that's
not obvious in the machine either - as the control circuitry is pretty
simple (one small circuit board for the entire generator).

So, while I "doubt" that the battery is charged by a power supply
connected to the 240VAC (or even the 120VAC half), the question deserves
a definitive answer, which I will get from Generac and report back.

Danny-

On page 12 of the manual, the diagram at the left side of the page shows
a Battery Charge winding connected to a rectifier. One side of the
winding goes to the Control Logic PCB. Output of the rectifier goes to
a fuse, and then to the battery. There is also a connection to the
Control Logic PCB via SW2A.

So the battery is apparently charged when the generator is running. It
is not clear if it is also charged through one of the three transfer
switch connections. SW2 may be an option you can set to allow that, but
I did not see any mention in the manual.

Fred