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- 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.
- 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. As explained in our book ‘Energy Unlimited’, AGM batteries are more suitable for short-time delivery of high currents than gel batteries.
- 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.
- Low Self-Discharge Because of the use of lead calcium grids and high purity materials, Victron VRLA batteries can be stored during long periods of time without recharge. The rate of self-discharge is less than 2% per month at 20°C. 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.
- Exceptional Deep Discharge Recovery Victron VRLA batteries have exceptional discharge recovery, even after deep or prolonged discharge. Nevertheless repeatedly deep and prolonged discharge has a very negative effect on the service life of all lead acid batteries, Victron batteries are no exception.
- Battery Discharging Characteristics The rated capacity of Victron AGM and Gel Deep Cycle batteries refers to 20 hour discharge, in other words: a discharge current of 0,05 C. The rated capacity of Victron Tubular Plate Long Life batteries refers to 10 hours discharge. The effective capacity decreases with increasing discharge current (see table 1). Please note that the capacity reduction will be even faster in case of a constant power load, such as an inverter.
Discharg time (constant current)
End Voltage
V
AGM
‘Deep Cycle’ %
Gel ‘Deep Cycle’ %
Gel ‘Long Life’ % 20 hours 10,8 100 100 112 10 hours 10,8 92 87 100 5 hours 10,8 85 80 94 3 hours 10,8 78 73 79 1 hour 9,6 65 61 63 30 min. 9,6 55 51 45 15 min. 9,6 42 38 29 10 min. 9,6 38 34 21 5 min. 9,6 27 24 5 seconds 8 C 7 C
Our AGM deep cycle batteries have excellent high current performance and are therefore recommended for high current applications such as engine starting. 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.
- Effect of temperature on service life High temperature has a very negative effect on service life. The service life of Victron batteries as a function of temperature is shown in table 2.
Average Temperature
AGM
‘Deep Cycle’
years
Gel ‘Deep Cycle’
years
Gel ‘Long Life’
years 20°C / 68°F 7 - 10 12 20 30°C / 86°F 4 6 10 40°C / 104°F 2 3 5
Gel and AGM Batteries
Table 2: Design service life of Victron batteries under float service
Table 1: Effective capacity as a function of discharge time (the lowest row gives the maximum allowable 5 seconds discharge current)
AGM Battery
12V 90Ah
GEL OPzV 2V cell
Fig. 1: Effect of temperature on capacity
- Effect of temperature on capacity As is shown by the graph below, capacity reduces sharply at low temperatures.
- Cycle life of Victron batteries Batteries age due to discharging and recharging. The number of cycles depends on the depth of discharge, as is shown in figure
AGM Deep Cycle Gel Deep Cycle Gel Long Life
- Battery charging in case of cycle use: the 3-step charge curve The most common charge curve used to charge VRLA batteries in case of cyclic use is the 3-step charge curve, whereby a constant current phase (the bulk phase) is followed by two constant voltage phases (absorption and float), see fig. 3.
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.
Depth of discharge Fig. 2: Cycle life
Fig. 3: Three step charge curve
Cycles
Charge voltage Charge current
Temperature ( ° C)
Victron Energy B.V. | De Paal 35 | 1351 JG Almere | The Netherlands General phone: +31 (0)36 535 97 00 | E-mail: [email protected] www.victronenergy.com
Float Service (V)
Cycle service Normal (V)
Cycle service Fastest recharge (V) Victron AGM ‘Deep Cycle’ Absorption 14,2 - 14,6 14,6 - 14, Float 13,5 - 13,8 13,5 - 13,8 13,5 - 13, Storage 13,2 - 13,5 13,2 - 13,5 13,2 - 13, Victron Gel ‘Deep Cycle’ Absorption 14,1 - 14, Float 13,5 - 13,8 13,5 - 13, Storage 13,2 - 13,5 13,2 - 13, Victron Gel ‘Long Life’ Absorption 14,0 - 14, Float 13,5 - 13,8 13,5 - 13, Storage 13,2 - 13,5 13,2 - 13,
12 Volt Deep Cycle AGM General Specification
Article number Ah V
l x w x h mm
Weight kg
CCA
@0°F
RES CAP
@80°F
Technology: flat plate AGM Terminals: copper BAT406225084 240 6 320 x 176 x 247 31 700 270 Rated capacity: 20 hr. discharge at 25°C Float design life: 7-10 years at 20°C Cycle design life: 400 cycles at 80% discharge 600 cycles at 50% discharge 1500 cycles at 30% discharge
BAT212070084 8 12 151 x 65 x 101 2, BAT212120084 14 12 151 x 98 x 101 4, BAT212200084 22 12 181 x 77 x 167 5, BAT412350084 38 12 197 x 165 x 170 12, BAT412550084 60 12 229 x 138 x 227 20 280 80 BAT412600084 66 12 258 x 166 x 235 24 300 90 BAT412800084 90 12 350 x 167 x 183 27 400 130 BAT412101084 110 12 330 x 171 x 220 32 500 170 BAT412121084 130 12 410 x 176 x 227 38 550 200 BAT412151084 165 12 485 x 172 x 240 47 600 220 BAT412201084 220 12 522 x 238 x 240 65 650 250 BAT412124081 240 12 522 x 240 x 224 67 650 250
12 Volt Deep Cycle GEL General Specification
Article number Ah V l x w x h mm
Weight kg
CCA
@0°F
RES CAP
@80°F
Technology: flat plate GEL Terminals: copper BAT412550104 60 12 229 x 138 x 227 20 250 70 Rated capacity: 20 hr. discharge at 25°C Float design life: 12 years at 20°C Cycle design life: 500 cycles at 80% discharge 750 cycles at 50% discharge 1800 cycles at 30% discharge
BAT412600100 66 12 258 x 166 x 235 24 270 80 BAT412800104 90 12 350 x 167 x 183 26 360 120 BAT412101104 110 12 330 x 171 x 220 33 450 150 BAT412121104 130 12 410 x 176 x 227 38 500 180 BAT412151104 165 12 485 x 172 x 240 48 550 200 BAT412201104 220 12 522 x 238 x 240 66 600 220 BAT412126101 265 12 520 x 268 x 223 75 650 250
2 Volt Long Life GEL General Specification
Article number Ah V
l x b x h mm
Weight kg
Technology: tubular plate GEL Terminals: copper
BAT702601260 600 2 145 x 206 x 688 49 Rated capacity: 10 hr. discharge at 25°C Float design life: 20 years at 20°C Cycle design life: 1500 cycles at 80% discharge 2500 cycles at 50% discharge 4500 cycles at 30% discharge
BAT702801260 800 2 210 x 191 x 688 65 BAT702102260 1000 2 210 x 233 x 690 80 BAT702122260 1200 2 210 x 275 x 690 93 BAT702152260 1500 2 210 x 275 x 840 115 BAT702202260 2000 2 215 x 400 x 815 155 BAT702252260 2500 2 215 x 490 x 815 200 BAT702302260 3000 2 215 x 580 x 815 235
Table 3: Recommended charge voltage
Other capacities and terminal types: at request
