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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%
•Small batteries, motorcycles, garden tractors, etc., are usually rated in
•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
•NR means the charger setting is NOT RECOMMENDED.
•NA means not allowed. DO NOT charge at this setting
Charge Time Table for Batteries at 50% State-of-Charge
Battery |
| Battery Rating |
|
| |||
Type | AH | RC | CCA | 2 AMP | 10 AMP | 15 AMP | 20 AMP |
Motorcycle | 6 - 12 |
|
| 2 - 4 | NA | NA | NA |
and tractor |
|
|
|
|
|
|
|
12 - 32 |
|
| 4 - 10 | NA | NA | NA | |
|
|
| |||||
Car and |
| 40 - 60 | 200 - 315 | 8 - 11 | 1 - 2 | 1 - 1½ | ¾ - 1 |
| 60 - 85 | 315 - 550 | 11 - 16 | 2 - 3 | 1½ - 2 | 1 - 1½ | |
Truck |
| ||||||
|
| 85 | 550 - 1000 | 16 - 35 | 3 - 7 | 2 - 5 | 1½ - 3½ |
| 40 | 80 |
| 15 | 3 | 2 | 1½ |
Marine and | 80 | 140 |
| 26 | 5 | 3½ | 2½ |
Deep Cycle | 95 | 160 |
| 30 | 6 | 4 | 3 |
| 105 | 180 |
| 33 | 7 | 4½ | 3½ |
Gel Cell | 40 |
| 390 | 20 | 6 | NR | NR |
80 |
| 650 | 32 | 10 | NR | NR | |
|
|
Voltmeter Method
To find the time needed to fully charge your battery, determine the battery’s charge level with a voltmeter or electronic
Charge Factor Table
Voltmeter Reading |
|
| |
|
| Charge Factor | |
12 Volt Battery | 24 Volt Battery | Reading | |
12.67 | 25.34 | 100% | 0 |
12.45 | 24.90 | 75% | 0.25 |
12.25 | 24.50 | 50% | 0.50 |
12.03 | 24.06 | 25% | 0.75 |
11.86 | 23.72 | 100% | 1 |
SAFETY
OPERATION
MAINTENANCE TROUBLESHOOTING
PARTS
11