VRLA AGM: design life 7-10 years 
VRLA GEL: design life 12 years 
VRLA GEL 2 Volt cells: design life 20 years 

The AGM range has very low internal resistance making them particularly suitable for high current discharge applications such as for inverters, thrusters and winches as well as engine starting. 

The GEL model range offers best deep cycle durability and overall longer life. The use of high purity materials and lead calcium grids ensure that for both AGM and GEL products have particularly low self-discharge so that they will not go flat during long periods without charge. Both ranges are supplied with M8 drilled, flat copper terminals ensuring best possible connection contact and eliminating the need for battery terminals. The batteries are compliant with both CE and UL specifications in ABS fireproof containers and come with Victron's 2 year world-wide warranty.

Why a Battery Management System (BMS) is needed:

• A LFP cell will be damaged if the voltage over the cell falls to less than 2,5V.
• A LFP cell will be damaged if the voltage over the cell increases to more than 4,2V. Lead-acid batteries will eventually also be damaged when discharged too deeply or overcharged, but not immediately. A lead-acid battery will recover from total discharge even after it has been left in discharged state during days or weeks (depending on battery type and brand).
• The cells of a LFP battery do not auto-balance at the end of the charge cycle. The cells in a battery are not 100% identical. Therefore, when cycled, some cells will be fully charged or discharged earlier than others. The differences will increase if the cells are not balanced/equalized from time to time. In a lead-acid battery a small current will continue to flow even after one or more cells are fully charged (the main effect of this current is decomposition of water into hydrogen and oxygen). This current helps to fully charge other cells that are lagging behind, thus equalizing the charge state of all cells. The current which flows through a fully-charged LFP cell however, is nearly zero, and lagging cells will therefore not be fully charged. Over time the differences between cells may become so extreme that, even though the overall battery voltage is within limits, some cells will be destroyed due to over- or under voltage.
• Efficient In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance. The round trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead-acid battery is 80%. The round trip energy efficiency of a LFP battery is 92%. The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiencies of 50% or even less in solar systems where several days of reserve energy is required (battery operating in 70% to 100% charged state). In contrast, a LFP battery will still achieve 90% efficiency under shallow discharge conditions.

The GEL model range offers best deep cycle durability and overall longer life. The use of high purity materials and lead calcium grids ensure that GEL products have particularly low self-discharge so that they will not go flat during long periods without charge. They are supplied with M8 drilled, flat copper terminals ensuring best possible connection contact and eliminating the need for battery terminals. The batteries are compliant with both CE and UL specifications in ABS fireproof containers and come with Victron's 2 year world-wide warranty.

The PowerSafe TS range of single cells offers high performance, long life solutions for renewable energy applications.

PowerSafe TS cells are based on proven vented technology and designed for renewable energy applications that require maximum cycle life with the highest level of reliability. They are particularly suitable for use in solar energy installations, ensuring a continuity of electrical supply during the hours of darkness or during periods of reduced sunshine.

Reduced maintenance is achieved through the use of additional electrolyte which means cells only have to be topped-up once a year. This helps to keep down maintenance costs and makes them an ideal solution for many remote or unmanned locations.

Tubular positive plates are widely used in batteries for particularly demanding applications. In the PowerSafe TS range they have been optimised to give an extended cycle life and increased capacity.

Products available both filled & charged and moist charged
Up to 5200 cycles to 25% depth of discharge
Topping up required once a year only
Minimal maintenance required
Excellent operational safety including: fully insulated connectors and terminals, acid proof flame arrestor plug for each cell, protection of polarities during transport
Voltage rating: 2V
Nr. Of terminals: 2
Capacity:
- (C 120): 1120 Ah;
- (C 10): 816 Ah;
Dimensions L x L x H: 191 x 210 x 684 mm;
Weight: 45.4 Kg;
Topology: acid

The AGM range has very low internal resistance making them particularly suitable for high current discharge applications such as for inverters, thrusters and winches as well as engine starting. VRLA AGM: design life 7-10 years

VRLA technology

VRLA stands for Valve Regulated Lead Acid, which means 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 very high currents (engine starting) than gel 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, have 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. Please note that the capacity reduction will be even faster in case of a constant power load, such as an inverter.

Victron Energy 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.

The PowerSafe TS range of single cells offers high performance, long life solutions for renewable energy applications.

PowerSafe TS cells are based on proven vented technology and designed for renewable energy applications that require maximum cycle life with the highest level of reliability. They are particularly suitable for use in solar energy installations, ensuring a continuity of electrical supply during the hours of darkness or during periods of reduced sunshine.

Reduced maintenance is achieved through the use of additional electrolyte which means cells only have to be topped-up once a year. This helps to keep down maintenance costs and makes them an ideal solution for many remote or unmanned locations.

Tubular positive plates are widely used in batteries for particularly demanding applications. In the PowerSafe TS range they have been optimised to give an extended cycle life and increased capacity.

Products available both filled & charged and moist charged
Up to 5200 cycles to 25% depth of discharge
Topping up required once a year only
Minimal maintenance required
Excellent operational safety including: fully insulated connectors and terminals, acid proof flame arrestor plug for each cell, protection of polarities during transport

Voltage rating: 2V
Nr. Of terminals: 8
Capacity:
- (C 120): 3480 Ah;
- (C10): 2555 Ah;
Dimensions L x L x H: 487 x 212 x 813 mm;
Weight: 142.9 Kg;
Topology: acid

The PowerSafe TS range of single cells offers high performance, long life solutions for renewable energy applications.

PowerSafe TS cells are based on proven vented technology and designed for renewable energy applications that require maximum cycle life with the highest level of reliability. They are particularly suitable for use in solar energy installations, ensuring a continuity of electrical supply during the hours of darkness or during periods of reduced sunshine.

Reduced maintenance is achieved through the use of additional electrolyte which means cells only have to be topped-up once a year. This helps to keep down maintenance costs and makes them an ideal solution for many remote or unmanned locations.

Tubular positive plates are widely used in batteries for particularly demanding applications. In the PowerSafe TS range they have been optimised to give an extended cycle life and increased capacity.

Products available both filled & charged and moist charged
Up to 5200 cycles to 25% depth of discharge
Topping up required once a year only
Minimal maintenance required
Excellent operational safety including: fully insulated connectors and terminals, acid proof flame arrestor plug for each cell, protection of polarities during transport

Voltage rating: 2V
Nr. Of terminals: 2
Capacity:
- (C 120): 460 Ah;
- (C10): 340 Ah;
Dimensions L x L x H: 124 x 206 x 505 mm;
Weight: 20.6 Kg;
Topology: acid