Battery life of my coach battery in my Class A/

[Bonnie123]

I have been having trouble keeping a charge on my RV batteries though I have a battery tender & a Charger. Had the batteries tested & they said they were fine, yet they register no charge in my RV. Any suggestions as to what could be wrong?

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[gutfelt]

Bonnie123 wrote:
I have been having trouble keeping a charge on my batteries in my Class A though I have a battery tender & a charger. I had the batteries tested & they said they were fine, but they register no charge in my RV. Any suggestions as to what could be wrong? Though we have had our RV for quite awhile, we are still newbies!

assuming the gauge is reading correctly you either have a bad charger system, tripped breaker that runs your charger or a blown inline fuse
or in "some cases" the main 12 v disconnect solenoid disallows the charger to charge when its off
put a meter on the charger out lines and see what it reads and go from there

[time2roll]

Probably a switch or fuse if you have no 12v power. Or do you expect 120v power? (need to have an inverter)
One moment of reverse polarity might open a fuse.

[Artum_Snowbird]

It would be an immense help if you used a voltmeter and then listed the voltages at various times.

1 coach and chassis battery at rest
2 coach and chassis battery with engine running
3 coach and chassis battery when plugged in to power
4 what is the situation.... are you using the rig, is it plugged in, is it in storage?

[donn0128]

Salesman, storage, or what ever you want to call it. The switch with a big red lever. Is it on or off? If its on, then next step is to check voltage from the converter. With the battery disconnected and 120VAC to the coach check the voltage at the battery leads. It should read at least 13.5VDC. If not your converter DC output is dead. Possibly a bad converter or simply a blown fuse.

[Bonnie123]

I have been having trouble keeping a charge on my batteries in my Class A though I have a battery tender & a charger. I had the batteries tested & they said they were fine, but they register no charge in my RV. Any suggestions as to what could be wrong? Though we have had our RV for quite awhile, we are still newbies!