Originally Posted by Grizzlygibbs
Would a battery tender do the trick Triguy?
Sorry to get back so late to your question Grizzlygibbs. We were travelling most of the day and then setting up the campsite. Now its miller time
The Trojan batteries need 14.8 volts in bulk mode, which is something the typical WFCO converter and some portable charger won't do. Because I haven't changed out my WFCO, yet, (for a Progressive Dynamics that can hit that mark), I use a portable Stanley BC4009 Automatic Battery Charger (40 Amp)
. This one can also recondition the batteries and is something Trojan recommends you do as needed to prevent sulfation. It think this feature is important to keeping your deep cycle batteries healthy and long-lived.
Sulfation occurs when a lead acid battery is deprived of a full charge, which will happen if the converter cannot charge to its recommended volts as explained above. Crystals form within the battery and eventually larger crystals reduce the batteries active capacity. See Sulfation and How to Prevent it
As for the tender, I've got a battery tender on my AGM motorcycle battery. The battery tender helped that battery to last me 10 years but I don't believe my model is the best for deep cycle batteries (I'd have to check the specs but I don't believe it will provide the volts in bulk mode and it doesn't recondition).
If I were to leave it connected all the time in storage, then I would consider a Battery "Minder", which makes a number of really good charger/maintainer/desulfator units.
Hope this helps.