Thank you for all of your help in the past. Is there a particular charger you would recommend for charging a small battery bank of 2 Gel-Cell batteries (183aHr, wired in parallel)? I would really need one that is capable of trickle charging over a couple months unattended, as well as the ability to set a dip switch or other selector to have it charge regular auto/ marine flooded lead acid batteries.
I almost purchased a Samlex SEC1215 but figured I should check w/ the expert first.
There may be a charger that does both, but it does not seem very energy efficient. Most battery-maintainer type “trickle chargers” are very small and use very little electricity. They are designed to just off-set the standby losses for a battery bank not being used, and they are designed to use only a tiny amount of purchased electricity.
There are larger battery chargers that have switches to select from heavy charging to lower charge rates, but most do not go as low as you are needing and even if they did, they most likely would require much power to run in this low charge mode since you are dealing with larger capacity electrical components not being used at their rated output. There is nothing wrong with having two chargers on the same battery bank. Keep the trickle charger on full time, and use a larger charger when you need a fast re-charge after a heavy deep discharge.
The following link is for the unit I have used on several projects with good results. Its not a high dollar model, but seems to do a good job at a fair price.