Secondary Battery Question

[A_Ninja_Racer]

Hello All.  I'm thinking about installing a secondary battery in my 2016 silverado.  I want to run a Deep cycle battery and more or less keep it isolated for additional accessories like a power inverter and what not.  But I'm curious on what the best way would be to charge the battery for better longevity.  I think the cheaper route would of course be to charge it off of the Alternator  and to use an Isolator switch to keep the starter from pulling off of it during start up.  But I was also thinking that I might be able to get longer life out of a Deep Cycle Battery and would also be able to keep it completely isolated from the rest of the vehicles electrical system if I used a DC to DC Battery charger Like: 

 

https://www.amazon.com/CTEK-56-677-Automatic-Battery-Charger/dp/B005LBCVL4

 

So what are you guys opinions? is something like that ctek charger above going to take better care of the battery or will I get the same benefits by letting the Alternator do the charging? 

[Paintor]

7 way trailer plugs from truck..to camper...has a 12v hot wire to charge a campers battery.

 

Got that plug on your truck to tap into?

[Z2Z]

I did a similar setup on one of my companies trucks. I used a selenoid to separate the systems when the vehicle is not running. When it is running, the selenoid parallels the batteries together to keep the secondary battery charged. It runs a 3000w inverter that I use for power tools.

 

I’ll probably put one in my truck over the winter. I want to add an inverter for camping and an air ride system with air on board.