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Power Supplies & Backup

Battery Chargers

Battery chargers for 12 V, 24 V, 48 V and higher-voltage battery banks, from compact units to 1U rack models and bidirectional chargers that also convert battery power back to AC. The deciding specifications are battery chemistry (lead acid or lithium), charging current against the bank’s capacity, the charging curve (2 or 3 stage, or programmable), and whether you need CANBus or PMBus communication and temperature compensation.

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Choosing a battery charger

  • Battery voltage and chemistry: match the nominal bank voltage and check the charger supports your battery type; many models cover flooded, gel and AGM lead acid as well as lithium, while others are lead acid only.
  • Charging current: size it to the bank using the recommended battery capacity range listed on each product.
  • Charging curve: 3-stage charging suits most standby systems, and DIP-selectable or programmable curves allow tuning for different batteries.
  • Bidirectional units: BIC series models charge from AC and also convert battery power back to AC for battery energy storage.

Check the input voltage range, since several high-power models need 180 V AC or more, and whether the charger can power the load while charging. For unattended sites, use the Charger OK and Battery Full signals or CANBus or PMBus to monitor status, and fit the external temperature sensor where the battery area is not climate controlled.

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