Sorry about the delay in my reply, it's been a crazy week. In answer to your question I'm not completely sure what I have. I've always been under the impression that all 12 volt systems had an automotive-style alternator. The battery is 12 volts but it appears I have a generator. I've included a picture. The tag shows that it's a Delco Remy and the only numbers that can clearly be made out are 1857, thanks to a back yard paint job by a previous owner.I've also noticed the ignition / light switch is bypassed and not being used.