Samlex SEC-1230UL 12VDC 30A Lead-Acid Battery Charger 120/230VAC

The Samlex SEC-1230UL is a fully automatic, commercial-grade 30-amp battery charger designed to charge all types of 12-volt lead-acid batteries—including flooded, Absorbed Glass Mat (AGM), and gel cell—from either a 120 V/60 Hz or 230 V/50 Hz AC source. Its user-selectable 2- or 3-stage charging algorithm adapts to the application: 3-stage for standalone battery charging and 2-stage for batteries connected to a live DC load, effectively allowing the unit to function as a DC UPS. A single charger can service up to three independent battery banks simultaneously without requiring an external isolator, making it well suited for installations in communications sites, marine vessels, recreational vehicles, and battery backup systems where multiple banks must be maintained efficiently. Universal input voltage selection, onboard protection circuits, and UL-1564 listing make this a reliable, code-compliant choice for professional and commercial deployments.

Key features & benefits

• Simultaneous Three-Bank Charging — Charges up to three separate battery banks at once without requiring an external battery isolator, reducing installation complexity and cost in multi-bank systems.
• User-Selectable 2- or 3-Stage Charging — A DIP switch allows selection between a 3-stage algorithm for standalone battery charging and a 2-stage algorithm for charging batteries that remain connected to an active DC load, enabling DC UPS operation.
• Universal AC Input — Accepts 120 VAC at 60 Hz or 230 VAC at 50 Hz via user-selectable input, making the unit suitable for both North American and international deployments without additional hardware.
• Dual-Mode Operation — Functions as a dedicated battery charger or as a standalone DC power supply, offering operational flexibility across a wide range of stationary power applications.
• Universal Protection Circuit (UPC) — Integrated protection against short circuit, overload, reverse battery polarity, and over-temperature conditions safeguards both the charger and the connected battery banks.
• Onboard Metering and Status Indicators — A voltage meter display with ammeter readout and LED power-status indicators provide real-time visibility into charging state and output without external test equipment.
• UL-1564 Listed and FCC Part 15(B) Class B Compliant — Safety listing to UL Standard UL-1564 and EMI compliance to FCC Part 15(B) Class B support use in regulated environments and installations requiring documented safety certification.
• Compatible with All Lead-Acid Chemistries — Supports flooded, AGM, and gel cell 12-volt lead-acid batteries, consolidating charger inventory in mixed-fleet or multi-system environments.