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Small black rectangular box with terminal connectors and Victron Energy label

Victron Energy

Victron Energy Battery Balancer BBA000100100

SKU CH-0TBA-PWCCC

Equalises charge across series-connected 12 V batteries in 24 V or 48 V systems by drawing up to 1 A from the highest-voltage cell

  • Equalises charge across two series 12V batteries
  • Activates automatically when 24V system exceeds 27V
  • Draws up to 1A from the highest-voltage battery
  • Paralleling multiple units enables 48V bank balancing
  • California Proposition 65 warning for cancer and reproductive harm

Battery Balancer for Series 12V Banks

The Victron Energy Battery Balancer equalises the state of charge across two series-connected 12V batteries or multiple parallel strings. It activates when a 24V system voltage rises above 27V, drawing up to 1A from the higher-voltage battery to correct imbalance. This ensures all cells converge to the same state of charge during charging cycles.

Practical Limits of Passive Balancing

The device only operates when the overall charge voltage exceeds 27V, so it cannot correct imbalance during discharge or at lower voltages. Balancing current is capped at 1A, which may be insufficient for very large capacity banks with significant mismatch. Several units can be paralleled for higher current or to balance 48V banks using three balancers.

Not Suitable for Single Battery Systems

This balancer requires a series string of at least two 12V batteries to function and provides no benefit for standalone 12V installations. Buyers needing active balancing at lower voltages or higher balancing currents must seek alternative solutions. It also does not replace a battery management system with cell-level monitoring.

Highlights

  • Equalises charge across two series 12V batteries
  • Activates automatically when 24V system exceeds 27V
  • Draws up to 1A from the highest-voltage battery
  • Paralleling multiple units enables 48V bank balancing
  • California Proposition 65 warning for cancer and reproductive harm

Specifications

BrandVICTRON ENERGY

Questions about this item

Should I use one balancer or several for my 48 V bank?

A 48 V battery bank can be balanced with three Battery Balancers connected in parallel.

What happens when my 24 V system reaches 27 V?

The balancer turns on, compares the two series 12 V batteries, and draws up to 1 A from the higher-voltage string to equalise the state of charge.

Does the Proposition 65 warning cover cancer risk, birth-defect risk, or both?

The product carries both warnings: it contains a chemical known to California to cause cancer and a chemical known to cause birth defects or other reproductive harm.

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