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Rectangular metal power supply unit with ventilation slots and a voltage selector switch

Mean Well

Mean Well PB-300P-24 28.8V 10.5A power supply

SKU CH-QBY4-07176

Charges lead-acid batteries at 28.8V 10.5A with three-stage charging, selectable 115/230VAC input and passive PFC

  • TypeAT
  • Three-stage charging optimises lead-acid battery life
  • Switchable 115/230 VAC input suits global mains
  • Passive PFC meets EN61000-3-2 Class A
  • Four protection circuits guard against faults
  • Fan-free convection cooling ensures silent operation

Lead-acid battery charger

The Mean Well PB-300P-24 is a 300 W single-output charger designed for lead-acid batteries. It delivers 28.8 V at 10.5 A and operates from AC 115 V or 230 V selected by a switch. The unit uses free-air convection cooling and includes a two-colour LED loading indicator. It suits workshops, backup power systems and industrial equipment that rely on lead-acid chemistry.

Replaces linear or single-stage chargers

A three-stage charging profile reduces gassing and extends battery life compared with basic constant-voltage units. The jump is worth it when batteries cycle frequently or sit on float charge for long periods. Built-in protections against short circuit, reverse polarity, over voltage and over temperature protect both the charger and the connected bank. Passive PFC to EN61000-3-2 Class A is available as an option.

Limited to lead-acid chemistry

The fixed 28.8 V output and three-stage algorithm are tailored to lead-acid cells and cannot charge lithium, nickel or other chemistries safely. No communication interface or programmable parameters are provided, so integration with battery-management systems requires external circuitry. The AT form factor fits standard industrial enclosures but offers no redundancy or parallel operation.

Punti di forza

  • Three-stage charging optimises lead-acid battery life
  • Switchable 115/230 VAC input suits global mains
  • Passive PFC meets EN61000-3-2 Class A
  • Four protection circuits guard against faults
  • Fan-free convection cooling ensures silent operation

Caratteristiche tecniche

TypeAT

Domande su questo articolo

What AC input voltages can the PB-300P-24 accept?

The unit operates on either 115 VAC or 230 VAC, selected by the built-in voltage switch on the chassis.

Which step do installers most often miss when wiring the output?

Reversing the output polarity triggers the reverse-polarity protection and prevents charging; always confirm positive and negative leads before powering on.

How will I know when the lead-acid battery is fully charged?

The two-colour LED indicator changes colour once the three-stage charge cycle reaches the float stage, signalling a full charge.

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