Sears 200.713101 - Manual (Page 11)

CALCULATING CHARGE TIME
Battery Rating Method
Use the following table to more accurately determine the time it will take to fully charge a
battery that is initially at 50% State-of-Charge. identify your battery type and its associated
Charge Time in the table. Common battery types are:
• Small batteries, motorcycles, garden tractors, etc., are usually rated in Amp-Hours
(AH).
• Car and truck batteries, usually rated in Reserve Capacity (RC), Cold-Cranking Amps
(CCA).
• Marine, or deep cycle batteries are usually rated in either Amp-Hours or Reserve
Capacity
(RC).
Charge Time Table for Batteries at 50% State-of-Charge
Battery
Type
Battery Rating Charge-Time (Hours)
AH RC CCA 2 AMP 10 AMP 60 AMP
Motorcycle
and T ractor
6 - 12 2-4 NA NA
12-32 4- 10 NA NA
Car and
Truck
40 - 60 200 - 315 8 - 11 1 -2 NA
60 - 85 315 - 550 11 - 16 2-3 NA
85 -190 550 - 1000 16 - 35 3-7 NA
Marine and
Deep Cycle
40 80 15 3 NA
80 140 26 5 NA
95 160 30 6 NA
105 180 33 7 NA
NA = Not Allowed. DO NOT charge at this setting.
Voltmeter Method
To find the time needed to fully charge your battery, determine the battery’s charge level
with a voltmeter or electronic State-of-Charger Tester. Use the table below to convert
Voltmeter and State-of-Charge readings at room temperature to the appropriate Charge
Factor. Then use the formulas that follow the table to determine the approximate charge
time.
Charge Factor Table
Voltmeter Reading
State-of-Charge
Reading Charge Factor
12 Volt Battery 6 Volt Battery
12.67 6.34 100% 0
12.45 6.22 75% 0.25
12.25 6.12 50% 0.50
12.06 6.03 25% 0.75
11.86 5.93 0% 1
11