Good Sam Club Open Roads Forum: 12v batteries not receiving charge from shore power.
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 > 12v batteries not receiving charge from shore power.

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Open road

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Joined: 07/21/2020

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Posted: 09/05/20 10:06pm Link  |  Quote  |  Print  |  Notify Moderator

Hi All,

First-time poster to this forum. Thanks in advance for any help with this....
We have an Outdoors RV Mfg. Black Rock 17’ travel trailer purchased new in 2014. I’m having issues charging batteries from both shore power and portable generator.

Some details are as follows:
• WFCO 45AMP Power Converter (attached pic);
• Fuses at rear of Power Converter are all in working order;;
• Loose ground on exterior of Power Converter was initially loose and tightening it up seemed to rectify issue for short term (battery received charge, Power Converter was warm to touch) but solution was short lived and had not worked since;
• Fuses in fuse panel are all in working order (attached pic);
• Control console for trailer located inside door (attached pic) should show full-power (4 lights) when plugged into shore power / generator but it does not;
• Generator works when charging separate RV;
• Shore power cable is not the issue because microwave and stereo have power when connected to external power source;
• Batteries do charge (via truck alternator) when towing;
• 12v batteries are new (2019);
• Have small (admittedly underpowered) 30watt solar panel that connects directly to batteries while at destinations (we typically do not camp w/ any shore power or septic);
• All light fixtures work while running on battery power;

The only other thing I can of would be to check connections at the rear of the fuse panel which would involve pulling panel from housing below fridge. I do have basic tools for most tasks on hand (were currently out at lake with trailer in campground w/ no services). I also have a volt meter to troubleshoot related issues.

That’s about all I can think of at this point.



**Edit** - cannot seem to figure out how to post images to thread. =S




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Posted: 09/05/20 10:25pm Link  |  Quote  |  Print  |  Notify Moderator

Use this link
Upload your photo there
RV net photo hosting
Once your photo has been uploaded
Copy the url for the uploaded photo
And paste in your posting

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Flute Man

Payson, Arizona

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Posted: 09/05/20 10:34pm Link  |  Quote  |  Print  |  Notify Moderator

Did you check the 120 V circuit breaker that feeds the converter?
On that connection you previously tightened remove it and clean it up and then reinstall.

You may call me if you wish and I might be able to help you over the phone. I am a retired professional electrical troubleshooter.

Jerry Parr
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Southern California

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Posted: 09/05/20 10:38pm Link  |  Quote  |  Print  |  Notify Moderator

OK so check the WFCO is getting in 120vac and putting out 13.6vdc

But it is mostly pointless if you are using a generator. WFCO is notorious for not entering boost mode (14.4v) when expected and instead will just trickle charge your battery in normal mode of 13.6 volts. (12+ hours to charge) Replace the WFCO with Progressive Dynamics, IOTA or Boondocker. (4 hour charge)

Of course if the voltage is not getting to your battery you have an open circuit. In this case keep poking at all connections and components in the loop until you find the spot where voltage cuts off. Repair, replace, adjust, clean or tighten this issue until voltage is same from battery to the load/fuse center.

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Port Charlotte Fl/ Hindsdale MA

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Posted: 09/06/20 03:42am Link  |  Quote  |  Print  |  Notify Moderator

Have battery load tested. check "reverse Polarity" fuses on converter. Disconnect 12 volt output wires from converter. Test voltage out of converter. Look for resetable 12 volt fuse under toung ofn trailer within 6' of the battery.

2011 Keystone Sprinter 323BHS. Retired Master Electrician. Retired Building Inspector.

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Pacific NW

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Posted: 09/06/20 07:42am Link  |  Quote  |  Print  |  Notify Moderator

Give the folks T in Boise they will talk you through things and provide options we did this when ours failed and did a plug and play replacement

Winnebago Access 24V

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