should bring a healthy FLA battery
bank to the "gassing voltage" before cutting back to float voltage. "Gassing voltage" is that point where very small gas bubbles just start to form and rise through the electrolyte providing some mixing and agitation and is generally >14.2VDC at 77F. Gassing voltage is temperature dependent; low temperature requires higher voltage and vice versa and is the reason that I recommend temperature compensated charging
sources for an optimum system.
BTW, Series 31 batteries are not "deep cycle", no matter what the label says. They are classed as starting, lights and ignition (SLI) batteries and utilize thin plates to deliver a lot of power in a short period of time.
In general, you cannot "cook" your batteries unless the charging
voltage gets excessive. With your new installation
the batteries at the battery
posts with a DMM through a charge cycle.