I just installed a couple of 115 AH AGM deep cycle coach batteries so don't know how they're going to act with our stock 13.6 volt converter under various charging start points.
The two 100 AH AGMs they replaced NEVER would draw anywhere near the full 45 amps available from the stock 13.6 volt converter, so I knew that 13.6 volts was not enough to make those AGMs guzzle high currents from a 12.2 volt SOC starting point. I'm expecting about the same behaviour from the new AGMs.
However, under the higher charging voltages from the alternator, the previous AGMs would begin to drink up the current.
The above scenarios full right in line with what everyone talks about - and the engineering graphs show - regarding how just a bit higher charging voltages can cause lead acid batteries to accept way more charging current .... hence charger faster with higher initial charging voltages.
The above realities of battery charging lead me to believe that by playing with any Megawatt's output voltage adjustment, one can tune it so as to get the best charging speed possible with about any size battery bank with just about any size generator available. Of course, the smaller the generator, the longer the charging time ... you can't tune your way out of that.
