Hi guys, I left my trailer plugged into the car tow package overnight(7 prong) and I woke up to dead batteries, both trailer and car.Even though my trailer was plugged into the 30amp station at the rv park. Will the inverter not charge the batteries if I leave my trailer plugged in the car?Help!

Yes, the converter (not inverter) should charge the on-board trailer batteries and in your case without an isolater to the tow vehicle it should charge the vehicle battery too.Make sure of the following:1. AC power is on inside the trailer (e.g. check a 120V receptacle).2. The breaker for the converter is not tripped. Turn them all off and back on the be sure.3. The fuses on the converter aren't blown from a previous overload or reversed battery install.If you have access to a voltmeter, check that the voltage on the battery rises from 12.x to 13.x or more when you plug in shore power. If it doesn't change when you plug in, the converter isn't powered or working.

Thank you for your reply. Very helpful. I will check those right away. And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

KeTuanis wrote:Thank you for your reply. Very helpful. I will check those right away. And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.

AC-LOL. Thank you. great minds think alike :)

Boomerweps wrote:KeTuanis wrote:Thank you for your reply. Very helpful. I will check those right away. And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.Correct. Plug in a lamp, cell phone charger, use the microwave if you have one or even the air conditioner if you'd like ;). Some folks make the mistake that because the lights are on and the fridge runs that the shore power is good.

BATTERIE/CHARGING ISSUES | Good Sam Community

wnjj
Explorer II
Apr 08, 2019
Yes, the converter (not inverter) should charge the on-board trailer batteries and in your case without an isolater to the tow vehicle it should charge the vehicle battery too.

Make sure of the following:

1. AC power is on inside the trailer (e.g. check a 120V receptacle).
2. The breaker for the converter is not tripped. Turn them all off and back on the be sure.
3. The fuses on the converter aren't blown from a previous overload or reversed battery install.

If you have access to a voltmeter, check that the voltage on the battery rises from 12.x to 13.x or more when you plug in shore power. If it doesn't change when you plug in, the converter isn't powered or working.
KeTuanis
Explorer
Apr 08, 2019
Thank you for your reply. Very helpful. I will check those right away.

And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?
Boomerweps
Explorer
Apr 08, 2019
KeTuanis wrote:
Thank you for your reply. Very helpful. I will check those right away.

And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.
KeTuanis
Explorer
Apr 08, 2019
AC-LOL. Thank you. great minds think alike :)
wnjj
Explorer II
Apr 08, 2019
Boomerweps wrote:
KeTuanis wrote:
Thank you for your reply. Very helpful. I will check those right away.

And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.

Correct. Plug in a lamp, cell phone charger, use the microwave if you have one or even the air conditioner if you'd like ;). Some folks make the mistake that because the lights are on and the fridge runs that the shore power is good.
wgriswold
Explorer
Apr 08, 2019
wnjj wrote:
Boomerweps wrote:
KeTuanis wrote:
Thank you for your reply. Very helpful. I will check those right away.

And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

I just look at the clock on the microwave.
Vintage465
Nomad
Apr 09, 2019
Did you find the issue? Something "high draw" had to be on to kill all the batteries. I'd look at the break-away switch for the trailer brakes. Under the propane tank, see if the cable is pulled.
KeTuanis
Explorer
Apr 09, 2019
Regarding the Brakes switch you mentioned:

Are you saying that normally we need to unplug this device when we get to shore?

Would unplugging the trailer from the Truck do the trick?

What exactly do you mean by pull the cable?
bjkb1f
Explorer
Apr 09, 2019
KeTuanis wrote:
Regarding the Brakes switch you mentioned:

Are you saying that normally we need to unplug this device when we get to shore?

Would unplugging the trailer from the Truck do the trick?

What exactly do you mean by pull the cable?

There should be a thin cable attached to the safety chains that will get pulled if the hitch should come off the ball. It engages the trailer brakes. Make sure this wasn't somehow pulled, thereby engaging the trailer brakes. At least I assume that is what he is referring to.
time2roll
Nomad
Apr 09, 2019
Plug in and check your battery voltage direct on the terminals. 13.2+ is charging. 12.5 or less is not charging.

Post the results.

Otherwise yes when you are plugged in all batteries should remain charged.

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