Lead Carbon Battery 12V/106Ah (M8)

Lead Carbon Battery 12V/106Ah (M8)

Victron manufacture high quality power systems for Motorhomes, Caravans, Commercial Vehicles and boats.

  • Better partial state-of-charge performance
  • More cycles, Higher efficiency
  • For Commercial vehicles and Motorhomes/Campervans
  • Reduced sulfation and improves charge acceptance of the negative plate

Fitting Information:

Installation by Conrad Anderson available, contact us to discuss - click on "request a fitting quote" above.

Delivery: 3-7 Working Days
£279.58

Victron's Lead Carbon Battery 12V/106Ah (M8)* range have some real advantages over other traditional Lead acid batteries

  • Less sulfation in case of partial state-of-charge operation.
  • Lower charge voltage and therefore higher efficiency and less corrosion of the positive plate.
  • And the overall result is improved cycle life.

Tests have shown that our lead-carbon batteries do withstand at least five hundred 100% DoD cycles. The tests consist of a daily discharge to 10,8V with I = 0,2C??, followed by approximately two hours rest in discharged condition, and then a recharge with I = 0,2C??. (Several manufacturers of lead-carbon batteries claim a cycle life of up to two thousand 90% DoD cycles. Victron Energy have not yet been able to confirm these claims).

Recommended charge voltage

Float Service Cycle Service
Absorption 14,1 - 14,4V
Float 13,5 - 13,8 V 13,5 - 13,8 V
Storage 13,2 - 13,5 V 13,2 - 13,5 V

Cycle life

  • ? 500 cycles @ 100% DoD (discharge to 10,8V with I = 0,2C??, followed by approximately two hours rest in discharged condition, and then a recharge with I = 0,2C??)
  • ? 1000 cycles @ 60% DoD (discharge during three hours with I = 0,2C??, immediately followed by recharge at I = 0,2C??)
  • ? 1400 cycles @ 40% DoD (discharge during two hours with I = 0,2C??, immediately followed by recharge at I = 0,2C??)

Failure modes of flat plate VRLA lead acid batteries in case of intensive cycling

The most common failure modes are:

  • Softening or shedding of the active material. During discharge the lead oxide (PbO2) of the positive plate is transformed into lead sulfate (PbSO4), and back to lead oxide during charging. Frequent cycling will reduce cohesion of the positive plate material due to the higher volume of lead sulfate compared to lead oxide.
  • Corrosion of the grid of the positive plate. This corrosion reaction accelerates at the end of the charge process due to the, necessary, presence of sulfuric acid.
  • Sulfation of the active material of the negative plate. During discharge the lead (Pb) of the negative plate is also transformed into lead sulfate (PbSO4). When left in a low state-of-charge, the lead sulfate crystals on the negative plate grow and harden and form and impenetrable layer that cannot be reconverted into active material. The result is decreasing capacity, until the battery becomes useless.

It takes time to recharge a lead acid battery

Ideally, a lead acid battery should be charged a rate not exceeding 0,2C, and the bulk charge phase should be followed by eight hours of absorption charge. Increasing charge current and charge voltage will shorten recharge time at the expense of reduced service life due to temperature increase and faster corrosion of the positive plate due to the higher charge voltage.

Lead-carbon: better partial state-of-charge performance, more cycles, and higher efficiency

Replacing the active material of the negative plate by a lead-carbon composite potentially reduces sulfation and improves charge acceptance of the negative plate.