My trailer has been on shore power for some time and the battery is dead. I checked power to the trailer and have 120 volts AC. I checked the output from the converter at the battery and at the converter and I am only getting 4 volts DC. I have done a search and can't find a converter problem that involves low voltage output, usually it seems that they just go dead.Any suggestions for solving this low output problem?Thanks in advanceBill

If voltage measured at converter and battery are both 4 volts, your converter is not putting out a charging voltage and you are just reading battery voltage at both points of measurement.Could be just a fuse or possibly no AC input power to converter, but you did state there was 120Vac verified at the converter input. Check fuses if they are readily accessible and remove battery and have it checked, recharge with portable if deemed OK. If fuses are the cause you can check converter output (carefully) without battery to verify proper operation which is indicated by an output voltage of 13.2 Vdc or higher. If converter has bit the dust, Randy at bestconverter.com should have an easily installed replacement, a positive is that the new converter may have improved charging characteristics, particularly important if you do get new batteries.

Your converter is probably dead. Call Best Converter and get a new converter. That's what I did when mine was reading 3 volts at the converter.

Sometimes the connections for our converter seem to come loose or get corroded. I take them loose, clean the connections, put them back together and evrything is fine. On our RV there is a small circuit breaker near the battery box. From time to time this trips and I have to push in a very small micro switch located on the circuit breaker to reset it. There are 3 circuit breakers one for each slideout and one for the converter. The converter also has a reset button.

Anything less than 13.2 is new converter time. Bench test before you spend money. You probably soon need a new battery too. Post the converter model for best replacement options. Do yourself and the battery a favor by getting a multistage converter.

Bill, since the lights run off of the converter, are the lights at normal brightness when the trailer is on shore power?

Low Converter Output | Good Sam Community

11 Replies

Sandia_Man
Explorer II
Aug 15, 2014
If voltage measured at converter and battery are both 4 volts, your converter is not putting out a charging voltage and you are just reading battery voltage at both points of measurement.

Could be just a fuse or possibly no AC input power to converter, but you did state there was 120Vac verified at the converter input. Check fuses if they are readily accessible and remove battery and have it checked, recharge with portable if deemed OK.

If fuses are the cause you can check converter output (carefully) without battery to verify proper operation which is indicated by an output voltage of 13.2 Vdc or higher. If converter has bit the dust, Randy at bestconverter.com should have an easily installed replacement, a positive is that the new converter may have improved charging characteristics, particularly important if you do get new batteries.

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Low Converter Output

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