Wing wrote:a smartpass coupled with a ctek dc-dc will make everyone happy.
VMN wrote:skirex wrote:Just Put a DC DC charger before the third battery so it is regulated and there will be less strain on the alternator.
By adding a DC-DC charger in the jack off you won't have the ability to use the vehicle mounted AUX battery in the jack off as the DC-DC charger will isolate the two batteries. You want to be able to charge both the vehicle AUX and the jack Off AUX at the same time. If you ever add solar panels to the jackoff this will also let the trucks AUX battery to be charged from solar which is desirable.
What is rarely mentioned is that a DC-DC charger places a constant load on the alternator whereas a conventional isolator does not.
Aquaholics wrote:Wing wrote:a smartpass coupled with a ctek dc-dc will make everyone happy.
It's the way I have gone for my duel battery set up.
For running three batteries, if the two auxiliary batteries were the same battery, bought the same time etc etc you could run them in parallel. I see no reason they then wouldn't receive 100% charge through the D250S and Smartpass.
Here is a bit of a demo on how they work.
Qwerty wrote:geez that's a step up in the complexity stakes! I like it though ha ha. I just have a "simple" dc-dc scenario that I thought was cool!
Aquaholics wrote:Qwerty wrote:geez that's a step up in the complexity stakes! I like it though ha ha. I just have a "simple" dc-dc scenario that I thought was cool!
I thought the same but went ahead and bought the set-up. I wired it all up on the bench and ran a few tests to help me understand how it all works (still learning). After seeing how it worked on the bench I installed it in the truck. I have been only running it a few weeks now and haven't had a chance to really test it (drain the second battery) but with the installation of the winch, spotties and lockers in the next month or so it will really get a workout.
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