[RE-wrenches] Kohler generator 1/2 voltage

[Kirk Herander]

Hello,
I got called in to debug an old off grid system with a Kohler 8.5 RES generator. Across L1-L2 is 120vac. From both L1 & L2 to common gnd/neutral is 60v. I verified the windings are connected for 120/240 operation(in series with center tap for G/N). These voltages are the same on the genny side of its breaker when turned off (no inverter connection). I am having trouble envisioning a scenario of mis-wiring if indeed each one of the windings is producing 120 VAC. Seems odd to me that a bad regulator would cause this, but who knows. Alternator? Ideas? Thanks.

Kirk Herander, VT Solar, LLC