Charging 12v battery

[marksiemer]

Bare with me. I am new to malt of this an am trying understand everything.

I just recently purchased a new 2017 Hideout 272LHS travel trailer. I understand the 12v battery up front will recharge while towing, but will it charge when the trailer is hooked up to 30a?

I plan to mainly use a generator to power the trailer but would like to ensure my battery has a charge from time to time. What is my best bet?

[PARAPTOR]

If you TV is properly equipped it will charge your trailer battery

When power is supplied to the trailer through the shore power cable, you on board converter will keep you battery (s) charged, make sure your battery disconnect switch if you have one is on. Make sure the 110 VAC breaker is on for the convertet

[chuckster57]

Your trailer battery will charge if the shore power cord is plugged into a live circuit. It will also charge as you drive as long as the "charge line" is active. Some vehicles come with this set up, some have the charge line present but not connected.

If your using a generator to power things in the trailer, then you can get an adaptor that will allow the 30A shore cord to plug into the 30A outlet on the gen if it has one. You could also run the gen to power a battery charger and just connect the charger wires to the battery.

[ctbruce]

Keep in mind that the wire supplying the charge for your tow vehicle is SMALL. It will keep a battery up like a trickle charger but will take a long time to charge a depleted battery...if at all. For traveling to and from a campsite that is fine. If this is your plan while at a site, you'll burn a lot of gas with little return. Shore power or your Gen are better choices.


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[Desert185]

Originally Posted by ctbruce

Keep in mind that the wire supplying the charge for your tow vehicle is SMALL. It will keep a battery up like a trickle charger but will take a long time to charge a depleted battery...if at all. For traveling to and from a campsite that is fine. If this is your plan while at a site, you'll burn a lot of gas with little return. Shore power or your Gen are better choices.


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And some are hot even with the key off. So if you leave the TV connected for any period of time, disconnect the plug if your's is hot with the key off. Your truck may not start after a certain period of time with your TV battery(s) attempting to charge your trailer battery(s).

[fourfourto]

My truck has a 145 amp alternator, seems to charge trailer battery from 1/2 to full in 15 to 20 minutes.
not so bad considering I usually am plugged into shore power.
2x a day running 15 minutes is better than using a generator.
If I didn't use the tv or dvd my battery would last a long time.
I forgot what gauge wire I used but I went with oversized one when hooking up trailer 7 prong plug.

[ctbruce]

That would be an exception and certainly not the rule or norm. Did you change the wire gauge on both the truck and the trailer?

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[fourfourto]

no just the truck I didn't go crazy big wire its been 10 years I went 1 grade up
either called for 12g I went 10g or called for 10g I went 8g I don't remember .
all I know it charges good off tow vehicle.
I do have a optima 150 aph battery and put in led bulbs throughout.
and my inverter has no fan.