>>>Tom Lins wrote on Sat, 24 August 2019 18:53

Silvernort wrote on Sat, 24 August 2019 19:41

On my 73 I've owned since this May, I have a Generac Guardian RV generator that had been working fine. Recently it wouldn't start and seemed to be the battery which looked kinda old. So got a new battery. charged it and gen started fine, but after a few hours died. The battery was discharged, so I jumped it and started right up. Disconnect the jump box and after about a minute the gen stops. Just to be sure I checked the fuel lines, filter and pump - all OK. Tried jumping again, started, this time left the jump box on. The gen stayed running for about 10 minutes so I disconnected the jump box and within a couple minutes the gen stopped. Next, put a trickle charger on the battery overnight. It started right up and kept running so after about half an hour I turned on the AC which worked fine. The fridge was working etc. This was yesterday, I shut it down then went out today and no go.
So it is providing power to the house fine but not charging its own starter battery. How can this be? There my also be some parasitic drain that is probably related, but not sure on that one.
Waddaya think?

Shane

Sounds like your converter is not plugged into an AC outlet or it is not working. If it works like the original Onan it only makes AC and does not make DC to charge the battery.

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I was just going over the schematic and it appears this unit has a winding just to charge the battery. This goes to a rectifier then to battery. I am not an elekchicken but I have a meter, just need to know what (how) to check these components out. ie on the rectifier which has three plugs (case probably ground) what do I look for.
Thanks for the help.
Shane