Originally Posted by Herk7769
Alternators are terrible deep cycle battery chargers....
Herk, I agree, but none of these damn chargers will not go above 14 or 14.5 volts and for deep cycle batteries, that is just not enough. Trojan recommends 15! The only chargers that I have found are smart Solar Charge Controllers, like Bogart's SC-2030. It will go up beyond 15 if so instructed, and solar panels can supply that much voltage.
The problem with converters is that they simply top out at 14.5 and won't go any higher. As the article indicates, if you don't go above 14 or 14.5, a 75% charged battery bank will push back hard enough to drop the current to 5 amps or so and at that current, it's along way to 100%.
I have discussed this with Bogart and also the possibility of using a 110 volt to DC power supply at 18 volts to replace my converter and get the same smarts when charging from AC as well as from solar. They agree that is doable, but I need to find a 30 amp power supply that will put up with PWM.
But only 15 amp hours in almost 6 hours is on the low side.