Napa Essentials 85-2500 - Manual (Page 12)

11. BATTERY CHARGING
11.1 Determine battery’s state of charge by following the instructions and chart
in section 10. Connect charger as per instructions in sections 7 and/or 8.
11.2 From the chart below, pick the row closest to the battery’s sate of charge
and read across to the battery size being charged. This value indicates the
approximate time required to recharge the battery.
• 10 •
11.3 An alternative method for calculating the time required to recharge a
battery in good condition is to follow this formula:
(reserve capacity in minutes) + 15.5 = amp hour capacity
2
(amp hour capacity) x (percent of charge needed) = time in hours
charger amp rate setting
(time in hours) x (recharge factor of 1.25) = recharge time
Example: Suppose a battery has an RC of 120 minutes and is
discharged down to 25%. We need to put in 75% more charge and we
want to use our charger’s 30 AMP charge setting: