5% AH charge amperage to 15 volts for top charging. Let amperage continue to raise voltage to 16.0 for equalization. A 31 makes for a poor excuse of a cyclable battery. Poor quality batteries eat power like peanuts. If you buy a good quality battery you will be pleased when you experience the Charge Efficiency Ratio. High voltage regular charging poisons the negative plates. Save fifty dollars on a golf car battery and spend two hundred more dollars fighting it generator charging over it's off grid lifetime. Good battery management is cheapskate battery management.
