Gel State of Charge as a Measure of Open-Circuit Voltage
Percentage
Charge
Specific
Gravity
Cell
6 Volt
12 Volt
24 Volt
48 Volt
100
NA
2.14
6.42
12.84
25.68
51.36
75
NA
2.11
6.33
12.66
25.32
50.64
50
NA
2.06
6.18
12.36
24.72
49.44
25
NA
2.00
6.00
12.00
24.00
48.00
0
NA
1.97
5.91
11.82
23.64
47.28
Call Trojan Battery Technical Support:
United States and Canada: 800-423-6569 ext. 3045
International: +1-562-236-3045
On the web:
http://www.trojanbattery.com/tech-support/
Charge Voltage Settings
TECHNICAL SUPPORT
■
Inspect battery at regular intervals. The tops of the batteries and
terminal connections should be clean, dry, and free of dirt or
corrosion.
INSPECTION
■
Gel batteries, sometimes referred to as sealed batteries, do not have
free flowing electrolyte or removable vents and lose very little water
during charging.
Because of their construction, gel batteries
are considered non-spillable and maintenance free since no
watering is required.
■
WARNING: Water should NEVER be added to deep-cycle gel
batteries.
■
Clean the top of the battery, terminals and connections with a cloth
or brush and a sodium bicarbonate solution (1 cup of baking soda to
1 gallon of water (150g/1L)).
■
Rinse with water and dry with a clean cloth.
■
Keep the area around batteries clean and dry.
WATERING
CLEANING
■
Proper charging will maximize battery performance.
■
Both under and over-charging can reduce the life of the battery.
■
Do not discharge your battery more than 80% to prevent over-
discharging and damaging the battery’s internal components.
■
Avoid charging at temperatures above 122°F (50°C).
■
Fully charge batteries before placing in storage.
■
Store in a cool, dry location, protected from the elements.
■
Batteries self-discharge during storage. Monitor the voltage every 4-6
weeks.
■
In high temperatures (greater than 90°F or 32°C) monitor the voltage
every 2-4 weeks as batteries will self-discharge faster.
■
Stored batteries should be given a boost charge when they are at or
less than 70% State of Charge (SOC).
■
After storage, recharge before use.
■
Gel batteries do not have free flowing electrolyte and therefore do
not experience stratification.
As a result, gel batteries do not
require equalizing.
■
WARNING: Do not equalize deep-cycle gel batteries.
CHARGING
STORAGE
EQUALIZING (flooded batteries only)
PREVENTATIVE MAINTENANCE
Follow these tips to ensure the life of your Trojan Gel Battery
Battery Top
Keep Clean
Battery Terminal
Clean & Remove Corrosion
3
5
4
6
Deep-Cycle Gel Batteries - Charger Voltage Settings
**
System Voltage
12 Volt
24 Volt
48 Volt
Bulk Charge
(2.40 VPC)
14.4
28.8
57.6
Float Charge
(if desired 2.25 VPC)
13.5
27
54
Recommended Trojan Deep-Cycle Gel Charging Profile
Note: Charging time will vary depending on battery size, charger output, and depth of discharge.
Voltage
(per cell)
Current
(Amps)
2.40V
(@25°C, 77°F)
Charge Current
Charge Voltage
20%
80%
100%
State of Charge (%)
10-13% C
20
