Trailer batteries

[Bobalos]

Yep youre right and at least you noticed. Its a very small different. Flooded lead acid batteries like a slightly higher voltage than AGM. So if you use that dongle during the summer time the AGMs were probably not the happiest of campers.

the funny/interesting thing is that it was that way for probably 12 or 13 years & worked fine.  the thing is though that I was fairly attentive to it.  I had the trailer unplugged almost all of the time & when the batteries started to sag I plugged the trailer in & topped them off.   things have changed........... my boys are growed up & moved out, my wife does not come out as often, I have other interests .......................  I was hoping to simplify things a bit. 

Trying to think of the most simple way to explain this. Break it down into 2 scenarios. 

1. Can you set it and forget it a couple days before a camping trip? Yes. The dongle will keep the battery fully charged and ready to go. 

2. Can you set it and forget it while you store for months? Nope. You dont want to keep your LiFepo4 stored fully charged if you can help it. 

-----------------

So whats the answer? I would use that cool little bluetooth shunt to determine when your battery is around 60%. Then turn off the charger. Couple days before a trip turn the charger back on. (of course monitor voltage.....make sure a small draw doesnt drain you dry)

that sounds like a scenario I could use reliably. 

 

[wopachop]

Another way to simplify is pretend you go camping. Come back home and the battery is around 50-70%. Dont even bother hooking up the charger.