As a restaurant owner, you understand that you only make money when your restaurant is open in typical Central New York market hours. Which is why Commercial Janitorial restaurant cleaning crews will work around your schedule, overnight, early morning, daytime, weekends, etc...
The typical charging voltage is between 2.15 volts per cell (12.9 volts for a 6 cell battery) and 2.35 volts per cell (14.1 volts for a 6 cell battery). These voltages are appropriate to apply to a fully charged battery without overcharging or damage.
Lead acid batteries prefer to be charge by a regulated constant voltage power source and the voltage should range between 2.2 and 2.4 volts per cell @ 70Â° F. The length of time a battery is being charged is the major factor in setting the voltage level. (Another factor is temperature.