Altronix MAXIMAL55EV Dual-Output 12VDC Power Supply/Charger with Battery Backup

Overview

The Altronix MAXIMAL55EV is a 220VAC-input, dual 12VDC power supply and battery charger designed for access control and security installations that demand clean, regulated power with supervised battery backup. Rated at two independent 10A outputs (20A combined), it ships pre-assembled in a BC800 wall-mount enclosure with two AL1012XB220 power supply/charger boards installed — no field assembly of the core power plant required. If you're specifying a 220VAC deployment in North America, Europe, or any market running at 198–256VAC mains, the MAXIMAL55EV lands in the right voltage class without a step-down transformer. Browse the full Altronix power supply line for the complete family of UL Listed power and charging solutions.

Key Features

• Dual Independent 12VDC @ 10A Outputs: Each of the two AL1012XB220 boards operates as a standalone filtered, electronically regulated supply — so a short circuit or overload on one output does not collapse the other. For an access control head-end powering door controllers and readers on separate circuits, this isolation matters. Pair with access control power distribution accessories as your door count grows.
• 220VAC Input (198–256VAC Working Range): Built for 220VAC mains with a working range of 198–256VAC and 50/60Hz compatibility. That flexibility handles mains voltage sag on long commercial runs and covers both 50Hz and 60Hz grids — useful when specifying international installs or facilities with industrial power infrastructure.
• Instantaneous AC Failover to Battery: On AC loss, the switchover to battery is instantaneous — no relay gap that could drop a door controller mid-transaction. The unit supports up to four 12AH/12VDC sealed lead acid or gel batteries within the BC800 enclosure, or 40AH/65AH with an external battery enclosure for extended hold-up time on long-duration power events. Batteries are sold separately.
• Three-Point Supervision via Form C Contacts: AC fail, low battery, and battery presence each present Form C contacts — meaning the monitoring panel or access control system gets a dry-contact alarm on each condition independently. AC fail notification trigger is field-selectable between 30 seconds (factory default) and 6 hours, so you can tune sensitivity to avoid nuisance alarms on brief utility blips. Connect these to any security management system with supervised input support.
• Thermal and Short Circuit Protection with Auto Reset: Both supply boards include thermal cutback and short circuit protection that auto-resets once the fault clears. In densely wired closets where a wiring mistake during commissioning is likely, auto-reset avoids a service call just to re-enable a tripped board.
• BC800 Enclosure — Rated for Up to 4 Internal Batteries: The 19