•
10
•
• Yellow or Red, but the needle remains
steady –
Indicates that the battery
capacity is not satisfactory. The battery
may be either defective or not fully
charged. Check the specific gravity of
the battery to see which condition exists.
If charging does not bring the battery up
to a full charge, the battery should be
replaced.
• Yellow or Red, but the needle continues
to fall –
Indicates the battery may be
defective or run-down. Release the load
switch and note the voltmeter reaction.
Voltage recovery into the green or above
within seconds indicates a defective
battery. A slow recovery indicates a run-
down condition. For best results, check the
specific gravity of the battery.
FAN OPERATION
It is normal for the fan to be on all the
time. Keep the area near the charger
clear of obstructions to allow the fan to
operate efficiently.
12. CALCULATING CHARGE TIME
When you know the percent of charge and
the Amp hour (Ah) rating of your battery,
you can calculate the approximate time
needed to bring your battery to a full charge.
Example:
Amp hour rating = Reserve capacity
+ 16
2
NOTE:
The Reserve Capacity can be
obtained from the battery‘s specification
sheet or the owners manual.
To calculate the time needed for a charge:
1.
Find the percentage of charge needed.
2.
Multiply the Amp hour rating by the
charge needed, and divide by the
charge rate.
3.
Multiply the results by 1.25 to find the
total time needed, in hours, to bring
the battery to full charge.
4.
Add an additional hour for a deep-cycle
battery.
Example:
Ah rating x % of charge needed x 1.25 = hrs of charge
Charger Amp setting
100 (Ah rating) x .50 (charge needed)
x 1.25 = 3.125 hrs
20 (Charger Setting)
100 x .50 x 1.25 = 3.125
20
You need to charge a 100 Ampere hour
battery for a little more than 3 hrs at the 20
Amp charge rate, using this example.
Use the following table to determine the time
it will take to bring a battery to full charge.
Ah – Ampere Hours
NR – the charger setting is NOT
RECOMMENDED.
CCA – Cold Cranking Amps
RC – Reserve Capacity
The times given are for batteries with a
50% charge prior to recharging.
BATTERY SIZE/RATING
CHARGE RATE/CHARGING TIME
1.5 A 2A
4A
10A 15A 30A 35A 40A 60A 80A
SMALL
BATTERIES
Motorcycle,
garden tractor, etc.
6-12 Ah
2¾-5
h
2-3¾
h
1-2 h
NR
NR
NR
NR
NR
NR
NR
12-32 Ah 5-13¼
h
3¾-
10 h
2-5 h
NR
NR
NR
NR
NR
NR
NR
CARS/
TRUCKS
200-315 CCA
40-60 RC
15-
19¼ h
11¼-
14½ h
5¾-
7¼ h
2¼-3
h
1½-2 h ¾-1 h 40-50
min
½-¾ h 23-29
min
17-22
min
315-550 CCA
60-85 RC 19¼-
24½ h
14½-
18¼ h 7¼-9 h
3-3¾
h
2-2½ h 1-1¼
h
50-60
min
¾-1 h 29-37
min
22-28
min
550-1000 CCA
85-190 RC 24½-
46¼ h
18¼-
34¾ h
9-17½
h
3¾-7
h
2½-
4½ h
1¼-
2¼ h
1-2 h
1-1¾
h
37-70
min
28-52
min
MARINE/DEEP CYCLE
80 RC
23½ h 17½ h 8¾ h
3½ h
2¼ h
NR
NR
NR
NR
NR
140 RC
36 h
27 h 13½ h 5½ h
3½ h
NR
NR
NR
NR
NR
160 RC
40 h
30 h
15 h
6 h
4 h
NR
NR
NR
NR
NR
180 RC
44 h
33 h 16½ h 6½ h
4½ h
NR
NR
NR
NR
NR
