1. VRLA technology:
VRLA stands for Valve Regulated Lead Acid, which means that the batteries are sealed. Gas will escape through the safety valves only in case of overcharging or cell failure. VRLA batteries are maintenance free for life.
2. Sealed (VRLA) AGM Batteries:
AGM stands for Absorbent Glass Mat. In these batteries the electrolyte is absorbed into a glass-fibre mat between the plates by capillary action.
3. Sealed (VRLA) Gel Batteries:
Here the electrolyte is immobilized as gel. Gel batteries in general have a longer service life and better cycle capacity than AGM batteries.
4. Low Self-Discharge:
The self-discharge doubles for every increase in temperature by 10°C. Victron VRLA batteries can therefore be stored for up to a year without recharging, if kept under cool conditions.
5. Exceptional Deep Discharge Recovery:
Repeatedly deep and prolonged discharge has a very negative effect on the service life of all lead acid batteries, Victron batteries are no exception.
6. Battery Discharging Characteristics:
Due to their construction, Gel batteries have a lower effective capacity at high discharge currents. On the other hand, Gel batteries have a longer service life, both under float and cycling conditions.
7. Effect of temperature on service life:
High temperature has a very negative effect on service life.
8. Effect of temperature on capacity:
Capacity reduces sharply at low temperatures.
9. Cycle life of Victron batteries:
Batteries age due to discharging and recharging. The number of cycles depends on the depth of discharge.
10. Battery charging in case of cycle use: the 3-step charge curve:
During the absorption phase the charge voltage is kept at a relatively high level in order to fully recharge the battery within reasonable time. The third and last phase is the float phase: the voltage is lowered to standby level, sufficient to compensate for self-discharge.
Disadvantages of the traditional 3-step charge curve:
A full absorption period after a shallow discharge will overcharge the battery, again reducing service life (a.o. due to accelerated corrosion of the positive plates).
11. Battery charging: longer battery life with Victron 4-step adaptive charging:
Victron developed the adaptive charge curve. The 4-step adaptive chare curve is the result of years of research and testing.
The Victron four-step adaptive charge curve solves the 3 main problems of the 3-step curve:
Battery Safe Mode
In order to prevent excessive gassing, Victron has invented the ‘Battery Safe Mode’. The Battery Safe Mode will limit the rate of voltage increase once the gassing voltage has been reached. Research has shown that this will reduce internal gassing to a safe level.
Variable absorption time
If the bulk time is short, this means the battery was already charged and the resulting absorption time will also be short, whereas a longer bulk time will also result in a longer absorption time.
Once every week the charge voltage is increased to the absorption level for a short period to compensate for self discharge (Battery Refresh mode).
12. Battery charging in case of standby use: constant voltage float charging:
During the first phase the battery is charged with a limited current (the bulk phase). Once a pre-set voltage has been reached the battery is kept at that voltage (the float phase). This charge method is used for starter batteries in vehicles and in uninterruptible power supplies (UPS).
13. Optimum charge voltage of Victron VRLA batteries:
The recommended charge voltage settings for a 12V battery.
14. Effect of temperature on charging voltage:
The charge voltage should be reduced with increased temperature. Temperature compensation is required when the temperature of the battery is expected to be less than 10°C / 50°F or more than 30°C / 85°F during long periods of time.
The recommended temperature compensation for Victron VRLA batteries is -4 mV / Cell (-24 mV /°C for a 12V battery).
The centre point for temperature compensation is 25°C / 70°F.
15. Charge current:
The charge current should preferably not exceed 0,2C (20A for a 100Ah battery).The temperature of a battery will increase by more than 10°C if the charge current exceeds 0,2C. Therefore temperature compensation is required if the charge current exceeds 0,2C.
Product Name: Victron 12V/60Ah Gel Deep Cycle Battery, 2 Year Warranty
(Global Trade Item Number): 8719076037149
Product Category: Batteries
Amp Hours (Ah) : 66.0 Ah
Battery Voltage: 12V
Float: 13.5 - 13.8
Rated Capacity: 20 hr. discharge @ 25°C
Charge voltage 'absorption': 14.1 - 14.4 (Normal)
CCA @0°F: 250
RES CAP @80°F: 70
NOTE Float design life: 12 years at 20°C
Dimensions: 229 x 138 x 227 mm (L x W x H)
Net Weight (kg): 20.0 Kg
Manufacturers Warranty: 2 Years
* Where allowed by applicable law and regulations, batteries must be shipped via Ground shipments only.