Manual

Battery Rating Method

Use the following chart to determine the approximate time it will take to fully charge a

battery that isinitially at 50% State-of-Charge. Identify your battery type and its

associated Charge Time in the table. Common battery types are:

• Small batteries, motomycles, garden tractors, etc., usually rated in Amp-Hours (AH).

• Car and truck batteries, usually rated in Reserve Capacity (RC), Cold Cranking

Amps (CCA), or both.

• Marine, or deep cycle batteries, usually rated in either Amp-Hours or Reserve

Capacity (RC).

Chart

le Time Table for Batteries at 50% State-of-Charge

Motorcycle 6-12 2 - 4 NA NA

and Tractor 12-32 4 -10 NA NA

40-60 200-315 8- 11 1 - 1½ NA

Car and 60-85 315-550 11 - 16 1½-2 NA

Truck

85-190 550-1000 16 - 35 2 - 5 NA

Marine and 40-80 80-140 15 - 26 1 - 2 NA

Deep Cycle 80-105 140-180 26 - 33 2 - 5 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-Charge 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

......... ' State-of:charge I

12 Volt Battery 6 Volt Battery Reading Charge Facto_

12.67

12.45

12.25

12.06

11.86

6.34 100%

6.22 75%

6.12 50%

6.03 25%

5.93 0%

0.25

0.50

0.75