Thanks for the feedback so far. A couple clarifications and thoughts:
- The storage barn is not mine, no chance of solar
- I actually pull the batts while in long term storage, keep them in my heated garage and charge them periodically (boat and rv batts) (December-February)
- The RV is used at 2 to 3 weekends per month, so when the batts do sit they are only sitting for a few weeks with them disconnected
- Let's rule out 8D, However I'm still out on 2 6v or 1 12v or agm/wet. Let's set price at $200 tops for batts (I think this puts me in the 2 6v league because I can get 220AH for about $190)
- Isolator questions: Matt_Colie: I'll check on my isolator. I guess my big thought was without the ProMariner my alternator (160 amp) will always feed both batts even possibly overcharging as the internal voltage regulator on the alternator is not that smart. (perhaps undercharging if I have a voltage drop on the isolator). With the ProMariner it will send the full alternator current possible to the battery that is in most need and also switch it off when it is charged.
- My overall theme here is how do I walk into my RV that may have been sitting for two weeks, drive it about 4-6 hours then boondock for 1-3 days. I've even looked at DC to DC chargers (marine stuff). Using this as a reference any more great thoughts/concerns? (don't worry I'm not buying a DC to DC charger).
If the ProMariner is going to help get me that last 2-3% of charge on my House batts I'll make the investment.
Again thinks for the dialogue this is all great stuff! I had never even known about 8D batteries until now....
Two decisions again:
1. Wet/AGM 6v/12v on a $200 budget
2. ProMariner at $130 worth the investment (even if small)
oh yeah...some won't like but I am putting a $8 digital voltmeter in my control center to see my batt volts (I have the chart for under load, and sitting with no load) for now the $8 is what I'm willing to invest....I have to get my boat prepped for summer....
