We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular metal charger unit with front panel controls and lug terminals

Samlex America

Samlex America SEC-1250UL 12V 50A 2-bank 3-stage battery charger

SKU CH-WEZW-E9Z55

Charges two 12 V battery banks simultaneously at 50 A using three-stage switch-mode technology with selectable 120 or 230 V AC input

  • TypeOthers
  • Charges two battery banks simultaneously with 50 A output
  • Three-stage algorithm suits Flooded, AGM and Gel lead-acid types
  • Selectable 120 V or 230 V AC input by DIP switch
  • Converts to two-stage mode for DC UPS or power-supply use
  • Built-in overload, short-circuit and over-temperature protection

Two-bank 12 V charger

The Samlex SEC-1250UL delivers 50 A across two independent battery banks from a single 120 V or 230 V AC source. It handles flooded, AGM and gel-cell lead-acid chemistries without manual intervention. Installers select two- or three-stage profiles via DIP switches to suit stand-alone or DC-UPS configurations.

Continuous full-current output

Switch-mode circuitry maintains the rated 50 A through the absorption and float stages without throttling. The half-power mode cuts peak draw when the AC supply is limited, yet the charger still completes each stage on both banks. Overload and short-circuit protection engage instantly without interrupting the other bank.

Silent convection cooling

No fan is fitted; the aluminium chassis dissipates heat passively during extended charge cycles. Over-temperature protection reduces output rather than shutting down, preserving supply to critical loads. The supplied temperature sensor adjusts voltage automatically, minimising gassing and keeping power draw close to the rated 1250 W maximum.

Highlights

  • Charges two battery banks simultaneously with 50 A output
  • Three-stage algorithm suits Flooded, AGM and Gel lead-acid types
  • Selectable 120 V or 230 V AC input by DIP switch
  • Converts to two-stage mode for DC UPS or power-supply use
  • Built-in overload, short-circuit and over-temperature protection

Specifications

BrandSamlex
TypeOthers

Questions about this item

How quiet is the SEC-1250UL when it runs continuously at 50 A?

Switch-mode technology keeps the charger lightweight and quiet during full-load operation.

What AC supply must I already have to power this charger?

It accepts a user-configurable 120 V 60 Hz or 230 V 50 Hz mains input.

Will the SEC-1250UL charge my existing flooded and AGM 12 V banks together?

Yes, it charges two separate 12 V lead-acid banks simultaneously — flooded, AGM or gel — without an isolator.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.