Cen-Tech battery charger -Harbor Freight

[Janderso]

Flyinfool,
I think you found the trick.
I'll look into a device.

 

[Janderso]

We are back from camping in the Shasta Trinity National Forest.
The batteries were fully charged on the drive up showing Full.
We went four days without an issue.
I powered up the Honda generator once so my wife could charge the I-Pads we use to read.

When I drop the trailer off tonight at the storage lot I will be sure to separate the internal draw from the batteries.

 

[Superburban]

Be careful trying to charge a really dead battery while driving. As you noticed it got hot and was pulling in 56 amps, That is a lot of load for a long time on the tow vehicle alternator and has a danger from an overheated battery. I have seen alternators have a short service life when doing a lot of heavy charging.

I learned that the hard way while traveling.I had a suburban with the GM 6.2 diesel. The morning we were to leave, both batteries were dead. I jump started it, and then about 7 hours later, the alt was dead.