How to Charge a Trailer Battery While Driving: 3 Common Problems (And How to Fix Them)

I’m rebuilding an old truck camper. The electrics are completely ripped out. I ideal want to be able to charge the battery from the truck whilst driving. From shore power and from solar. However this camper cost only $500 and I don’t want to spend alot (max $1000 ) on it. What is the cheapest way to do this?

We have a Class A, 33ft and tow a Ford Taurus. We have a 7pin connector. When we travel more than two hours, our battery is dead on the car. We have a booster charger and it starts right up. Why does it drain while we are driving? It is a new battery, too.

I have a Buick Enclave towing a teardrop with a 100 amp hr lithium house battery. Whats the best solution for charging while driving. The full voltage for house battery is 14.6. I have a200 watt solar panel and mppt controller. My fridge is just a two way and I would like to keep that running. Thanks in advance.

I was explaining to someone hooking up a 50 AMP DC to DC charger on my F350 to charge my trailer batteries running an inverter to power the refrigerator while driving down the road. I don't want the propane on while driving. Using a KW we saw that the refrigerator should pull about 40amps DC. This person who has a background in electronics asked why use the DC to DC charger. If both battery chemistries are the same why not eliminate the converter and wire (through breakers and a relay) from truck battery to trailer battery. Use the same 2 gauge wire that we were going to use for the DC charger from the truck through an Anderson plug then to the trailer. Would the truck alternator keep all battery voltages up in a full charge state? Any advice on this is appreciated.

Can the BCDC be mounted permanently on tow truck? I have a removable winch set up for my two trailers, one enclosed and one open. I'd like to be able to move battery and winch to either trailer, and charge battery. Thanks

I have a 2018 F350 with (2) 220 amp alternators and a factory installed power inverter. Will this sufficiently charge my batteries in the 5th wheel while towing? FYI. I have a solar charger for dry camping, just wondering if the system in the truck will help maintain the charge through the 7 pin hook up?

I am a new RVer and I do not know how to charge RV battery from a vehicle. So your information provided a lot for me. Thank you very much!

I was thinking of somehow hooking up a tender through a plug to charge the trailer battery while disconnected from the towing vehicle. basically so it would always be charged. any ideas?.. thx,

didnt see this above, so Ill ask. can I keep my trailer battery charged via the trailer plug with something similar to a battery tender? would that work?.. I just dont want to put a hole in the trailer to run a cord through if that makes sense.. thx

I have a 2016 f150 and am pulling an R pod with 2 -12 volt batteries... can not run the 12 volt refrigerator with out draining the batteries when towing.. a common problem with the f150s ... what do you recommend?

My utility trailer came equipped with the required DOT breakaway system. Shouldn’t the 7-way connection keep the battery charged ??

On one of our trailers, we have a solar charger,in conjunction with the trailer emergency brake battery. Havent seen another like it. What might be out there?

How can I keep my rv batteries from dying when not in use. They totally discharge and I have to replace them yearly

it seems easier t’o plug trailer power cord into my small generator and recharge batteries that way. Is there a reason this would not work?

above it states not to let your battery below 50 percent think some people would think that 50 would be half of 12 volts = 6 volts. when 1/2 is actually around 12.2 volts.Suggestion, include the correct numbers so customers are not confused

Can a portable generator, running in the the back of a pickup be used while traveling to provide A/C power for a battery charger or power for electric heat while driving?