David, I thought the complaint was not that the output was NOT a sine wave, but that the "precision" of the wave was somehow not that great.  That might be that the amplitude varies, and in a non-predictable way?  Not knowledgeable enough about generator function to be sure, but that's what it sounded like to me.  That might account for the ability of the thing to drive a tool motor, but not to support electronics (which the battery charger, if it is recent, almost certainly contains).  Make sense?

David

---- David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
> At 06:24 PM 2/8/2010, Loren Busch wrote:
> >I think you have already received the right answer:  The modified sine wave
> >coming out of the generator is not liked by your charger.
> >A brief look what I could find seems to indicate that (if you have the
> >generator I think you do) it has a special connection for charging
> >batteries.  If so, did you try that connection?
>
> Why should the output of a rotating generator be anything but a sine
> wave?  Does the generator have a low-voltage output which feeds an
> inverter for 110v?
>
> Yours,
> David