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AGM Batteries

Deep cycle AGM batteries are very effective solar energy storages. AGM batteries are the further development of gel batteries.
These batteries can be discharged deeper and last 2 – 4 times longer. Our AGM solar accumulators are cycle resistant, maintenance-free, leak-proof and not classified as hazardous material. Accumulators out of the Offgridtec AGM series are developed for an operating time of 10 years including 3 years manufacturer’s warranty. From an economic point of view the best compromise between expensive gel batteries and cheap lead-acid batteries.

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  1. Offgridtec® AGM 7Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 7Ah 20HR 12V - Deep Cycle Solar Battery

    (12)

    7Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 7AH (C20) at 12V battery voltage
    • terminal: 4,75mm/0,8mm spade terminal
    • dimensions: 151 x 65 x 94 mm

    In stock – delivery time 1-3 Werktage

    €15.90
    Incl. 19% Tax, excl. Shipping Cost
  2. Offgridtec® AGM 1,2Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 1,2Ah 20HR 12V - Deep Cycle Solar Battery

    (5)

    1,2Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 1,2AH (C20) at 12V battery voltage
    • terminal: 4,75mm/0,8mm spade terminal
    • dimensions: 97 x 43 x 50mm

    In stock – delivery time 1-3 Werktage

    €5.90
    Incl. 19% Tax, excl. Shipping Cost
  3. Offgridtec® AGM 234Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 234Ah 20HR 12V - Deep Cycle Solar Battery

    (1)

    234Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 234AH (C20) at 12V battery voltage
    •  terminal: M8 screw terminal (screws included)
    •  dimensions: 521 x 269 x 203 mm

    In stock – delivery time 1-3 Werktage

    Regular Price: €424.90

    Special Price €379.90

    Incl. 19% Tax, excl. Shipping Cost
  4. Offgridtec® AGM 122Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 122Ah 20HR 12V - Deep Cycle Solar Battery

    (11)

    122Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 122AH (C20) at 12V battery voltage
    •  terminal: M8 screw terminal (screws included)
    •  dimensions: 406 x 174 x 233 mm

    In stock – delivery time 1-3 Werktage

    €239.90
    Incl. 19% Tax, excl. Shipping Cost
  5. Offgridtec® AGM 32Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 32Ah 20HR 12V - Deep Cycle Solar Battery

    (5)

    32Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 32AH (C20) at 12V battery voltage
    • terminal: 5,5mm screw terminal
    • dimensions: 195 x 130 x 159 mm

    In stock – delivery time 1-3 Werktage

    €79.90
    Incl. 19% Tax, excl. Shipping Cost
  6. Offgridtec® AGM 4,2Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 4,2Ah 20HR 12V - Deep Cycle Solar Battery

    (3)

    4,2Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 4,2AH (C20) at 12V battery voltage
    • terminal: 4,75mm/0,8mm spade terminal
    • dimensions: 90 x 70 x 101 mm

    out of stock

    €12.90
    Incl. 19% Tax, excl. Shipping Cost
  7. Offgridtec® AGM 2,2Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 2,2Ah 20HR 12V - Deep Cycle Solar Battery

    (2)

    2,1Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 2,1AH (C20) at 12V battery voltage
    • terminal: 4,75mm/0,8mm spade terminal
    • dimensions: 175 x 35 x 60 mm

    In stock – delivery time 1-3 Werktage

    €8.90
    Incl. 19% Tax, excl. Shipping Cost
  8. Offgridtec® AGM 202Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 202Ah 20HR 12V - Deep Cycle Solar Battery

    (9)

    202Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 202AH (C20) at 12V battery voltage
    • terminal: M8 screw terminal (screws terminal)
    • dimensions: 525 x 243 x 220 mm

    In stock – delivery time 1-3 Werktage

    €364.90
    Incl. 19% Tax, excl. Shipping Cost
  9. Offgridtec® AGM 260Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 260Ah 20HR 12V - Deep Cycle Solar Battery

    (7)

    260Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 260AH (C20) at 12V battery voltage
    • terminal: M8 screw terminal (screws included)
    • dimensions: 520 x 268 x 220 mm

    In stock – delivery time 1-3 Werktage

    €464.90
    Incl. 19% Tax, excl. Shipping Cost
  10. Offgridtec® AGM 154Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 154Ah 20HR 12V - Deep Cycle Solar Battery

    (6)

    154Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 154AH (C20) at 12V battery voltage
    • terminal: M8 screw terminal (screws included)
    • dimensions: 97 x 43 x 50mm

    In stock – delivery time 1-3 Werktage

    Regular Price: €289.90

    Special Price €289.88

    Incl. 19% Tax, excl. Shipping Cost
  11. Offgridtec® AGM 101Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 101Ah 20HR 12V - Deep Cycle Solar Battery

    (18)

    101Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 101AH (C20) at 12V battery voltage
    •  terminal: M8 screw terminal (screws included)
    •  dimensions: 330 x 172 x 215 mm

    out of stock

    €204.90
    Incl. 19% Tax, excl. Shipping Cost
  12. Offgridtec® AGM 75,6Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 75,6Ah 20HR 12V - Deep Cycle Solar Battery

    (16)

    75,6Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 75,6AH (C20) at 12V battery voltage
    • terminal: M8 screw terminal (screws included)
    • dimensions: 258 x 168 x 208 mm

    out of stock

    €159.90
    Incl. 19% Tax, excl. Shipping Cost
  13. Offgridtec® AGM 51Ah 20HR 12V - Deep Cycle Solar Battery

    Offgridtec® AGM 51Ah 20HR 12V - Deep Cycle Solar Battery

    (7)

    51Ah Offgridtec® AGM deep cycle battery for various applications and a very high life-expectance of up to 10 years 

    • capacity of 51AH (C20) at 12V battery voltage
    • terminal: M6 screw terminal (screws included)
    • dimensions: 230 x 138 x 208 mm

    In stock – delivery time 1-3 Werktage

    €119.90
    Incl. 19% Tax, excl. Shipping Cost

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A AGM-battery - better know as sealed battery or maintenance-free battery - is a kind of lead-acid accumulator. Thanks to its inner structure it can be installed in every position, does not need ventilation and to be maintained constantly. Reduced ventilation allows the use of these batteries in closed or bad-ventilated rooms. AGM-batteries are widely used in portable electrical devices, off-grid systems and similar applications. Compared to other storage technologies like lithium-ion accumulators these batteries provide much more capacity at a low-price.

How do AGM-batteries work?

There are two main types of lead batteries - gel and AGM cells. Silica dust is added to the gel-cells' electorlytes which forms a latticed gel. These batteries are sometimes called 'silicone-batteries'. The battery forces fiberglass between the battery plates with the same outcome. Both versions have their advantages and disadvantages compared to common batteries. Lead-acid cells consist of two lead plates of an electrolyte which suspends out of a aqueous sulfuric acid solution. Lead-acid batteries consist of several cells which are wired in a row within a container. The AGM produces performance by reduction (or oxidation), while the electrolytes' PH value increases. When the battery is charged this reaction is inverted so the plates are in pure lead and the acid is produced again. This circle isn't perfect - often hydrogen gas escapes before it is combined with water again.

The use of AGM-batteries

To avoid the developement of this inflamable hydrogen gas it is necessary to ventilate the battery regularly. As the battery can be opened for this purpose it can cause danger during its  transport which makes the battery unsuitable for mobile applications. Moreover the constant loss of hydrogen during a ventilation causes a reduction of water within the electrolytes. 

That's why the water has to be replaced constantly. Many modern batteries have a float behind a small window that shows the current water level and pop-off caps for a refill.
AGM-batteries try to avoid all these problems by immobilizing the electrolyte. During this process the hydogen is bound near the plates and forced to recombination when the battery  has to be charged. This reduces the loss of water and normally makes the battery maintenance-free. Moreover the amount of hydrogen developement is reduced to the point when the battery can be sealed totally. Thanks to that the battery can be set up in any position without leaking.