Should batteries be disconnected when on shore power?

Thanks, will do.

Cinder296 wrote:
Thanks again. The second sentence is the type of inverter charger. It probably is the inverter/charger which is very expensive from what I hear since it is one unit. I think the inverter is working but not the charger part of it. So I will disconnect the 12 volt lines out of the box and put a battery charger on them separately.

Don't disconnect those 12v wires since that is also the input path from the batteries to the inverter.

Leave them alone, and just clamp the new external battery charger to the batteries separately.

Thanks again. The second sentence is the type of inverter charger. It probably is the inverter/charger which is very expensive from what I hear since it is one unit. I think the inverter is working but not the charger part of it. So I will disconnect the 12 volt lines out of the box and put a battery charger on them separately.

Cinder296 wrote:
My motor home is not charging the batteries for some reason.
I have heart interface source manager 20.

It looks like your converter/charger has failed.

The voltage should be the same at the converter as it is directly at the battery......but checking both places is a good thing to do.

The fact that the fan worked indicates that the converter is getting power IN (110-120 VAC) and if you measure less than 12 V on the output, then it is not working right.

The fan probably has a thermostat and only runs when the converter is HOT.

Just to be sure, you need to charge your batteries, disconnect the charger, measure the voltage and then leave them disconnected for 12 hours or so and then measure the voltage again. They should stabilize around 12.6-12.8, maybe even a bit higher.

What does that second sentence quoted above mean ?

P.S. If this problem has been going on very long, that is your batteries have been down aroung 10 volts 3 times or more OR they have been sitting like that for more than 24 hours (and they are not "deep cycle" type) you might be about due for new batteries too. But the converter needs to be fixed first.

You need to fix-repair-replace the inverter charger.
Or if the inverter is still working you could just get a converter to charge the battery and supply 12v power.

If this seems like a bit much you are best to just haul it in for repair.
Again if the batteries are sitting at 10.6 volts they need a charge asap. Get a 10+ amp portable charger if needed to get them charged up. When charged they should sit at 12.65 volts.

I forgot to say fuses are ok. Thanks again for taking the time to try and help me. I also noted that the fan stopped working on the inverter/ charging box when I was checking the fuses.

The 10.6 was the leads coming from the inverter/charging box. Is there some where else I should be checking? I have new batteries. I take leads off , and charge the batteries, but once I hook it back up the batteries will be dead in 48 hours. My motor home is not charging the batteries for some reason. I have heart interface source manager 20.

If 10.6 is also the battery voltage they are either shot or will be soon.

Cinder296 wrote:
Thank you for responding. Power in is 110, but power coming out is 10.6 .

If you are measuring that 10.6 directly on the battery, that probably means that the battery is VERY low and the converter is putting out NOTHING. Check fuses first.

Thank you for responding. Power in is 110, but power coming out is 10.6 . I think it is supposed to be 12.6 to13. I'm out of town right now but will check what type it is when I get home, and will post.