Couple of questions about DC-Dc charging
I've been thinking about adding a DC-DC charger now that I've added 400 amp hours of AGM batteries. There are lots of useful posts but I haven't run into a couple of things I'm curious about. One ...
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My Renogy DCDC which I haven’t installed yet says input amps are 1.3 x output amps so 60 amp draw for a 40 amp output charger.
The charger is an isolator as well so you don’t need a solenoid or another isolator between the starting battery and the house batteries.
The DCDC charger maintains a proper charging voltage profile for the batteries you have it set for. Modern alternators taper their voltage quickly so never really put a “bulk charge” into deep cycle batteries.
You need a signal wire to the DCDC to turn it on.
If you shorten the alternator life high output alternators are available and not that expensive.
If you are discharging your batterie completely on a daily basis you may have shorter alternator life vs light recharging cycles.
The charger is an isolator as well so you don’t need a solenoid or another isolator between the starting battery and the house batteries.
The DCDC charger maintains a proper charging voltage profile for the batteries you have it set for. Modern alternators taper their voltage quickly so never really put a “bulk charge” into deep cycle batteries.
You need a signal wire to the DCDC to turn it on.
If you shorten the alternator life high output alternators are available and not that expensive.
If you are discharging your batterie completely on a daily basis you may have shorter alternator life vs light recharging cycles.
