Originally Posted by Pedro Morais
Ok, after 36h on anchor
I start to get the bat alarm
buzz while by Victron smart shunt sill provides 12.2, 12.3 V. After some more hours the buzz starts a continuum beep... not pleasant.
My plan is to upgrade for AGM Bat and for that I'm already studding how to do it .
1- ask ENAG if that charger accepts AGM profiles. I doubt... so plant to buy a Charger with 40amp for a potential 400 amph service bank
2 - installing some solar panels
with Victron MPPT
3 - my big concern : Alternator for AGM... Should I buy a Alternator Controller (Sterling) and change also the starting bat for AGM, or buy a DC to DC charger and keep normal bat for starting and AGM for service. Here my concern is the shore charger, because I'll have difference bat profiles, lead acid and AGM.
First, I'd guess 12.2-12.3VDC is approaching approx. 50% depth
of discharge (DoD), and most battery makers recommend you not discharge below 50% DoD for best longevity. One simple solution, no new batteries required, is to recharge when you get to 12.2-12.3V.
Second, if those are wet batteries and they're easy enough to service, switching to AGM may or may not be an improvement. AGM isn't magic. And you can read about AGMs and PSOC in other threads around here. If you DO decide to buy new batteries, and if these are only for house service, then real deep cycle batteries (versus dual purpose) would likely be better. If these are also used for starting a relatively small engine
, deep cycle batteries would generally be no problem.
Third, the batteries will probably care more about exact bulk/absorption and float voltages from your charger -- then they will about the name of a given charging
profile. Learn what voltages Varta recommends, then see if the charger can do that -- probably without strict regard to profile name.
And finally, your alternator probably won't care what kind of batteries you have, and your batteries probably won't care what kinf of alternator you have... as long as the voltages are within appropriate range.