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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

  • Product 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.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $160.99
Pricier than about 54% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

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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