Altronix MAXFIT7F 24VDC 10A Expandable Power Supply with Battery Backup
Overview
The Altronix MAXFIT7F is a 24VDC, 10A single-output power supply and battery charger housed in a wall-mount BC750 enclosure — built for security integrators who need a clean, consolidated power distribution point for surveillance cameras, access control panels, or mixed low-voltage loads. Unlike a bare power supply, the MAXFIT7F ships as a complete system: the power supply/charger module, supervision circuitry, and the wall-mount enclosure are integrated, so you're not sourcing three separate components to build your panel. The BC750 enclosure is sized at 16.5"W x 20.5"H x 6.25"D — compact enough for a telecom room or secured closet, large enough to house up to four 12VDC/12AH batteries inside the enclosure itself without a separate battery cabinet.
This product belongs to the broader Altronix power and infrastructure line, which covers everything from single-supply units like this one to multi-output rack-mount systems. If you're spec'ing power for a new camera or access control run, this is the unit to look at for 24V regulated output with onboard supervision and battery backup in a single footprint.
Key Features
- 24VDC Regulated Output at 10A: Filtered and regulated output means downstream devices — cameras, readers, door hardware — see stable voltage even under load swings. That matters for PTZ cameras or electric locks that draw surge current on initialization. The 10A ceiling covers roughly 8–10 mid-draw 24V cameras simultaneously, depending on individual device loads.
- 1A Auxiliary Output (Unswitched): The power-limited auxiliary output stays live regardless of switched-output state — useful for powering a monitoring device, relay board, or secondary load that must remain on even when the main output is controlled. It's unswitched, so plan your circuit accordingly; devices on the aux rail won't respond to output-control commands.
- Onboard Battery Charger — Up to 4x 12VDC/12AH Batteries: The integrated charger handles up to four 12VDC/12AH sealed lead-acid or gel batteries within the BC750 enclosure. At four batteries, that's 48AH of reserve capacity — enough to sustain a 2A load for roughly 20+ hours, or a fully loaded 10A draw for approximately 4–5 hours, depending on battery condition and discharge curve. Batteries are sold separately; factor that into your bill of materials.
- Instantaneous AC Failover: On AC loss, the unit transfers to battery without a gap in output — critical for access control where a power interruption that drops a mag-lock or electric strike for even a fraction of a second can cause an unintended unlock or alarm event.
- AC Fail, Low Battery, and Battery Presence Supervision (Form C Contacts): Each supervisory condition outputs a Form C dry contact, so you can wire these directly into an alarm panel, BMS, or monitoring receiver. This isn't just an LED indicator — it's a hard contact you can route to a central monitoring station. Fire Alarm Disconnect is also supervised, with selectable latching or non-latching behavior and a 10K EOL resistor.
- Low DC Shutdown Protection: If battery voltage drops below 71–73% of nominal (for 12V units), the unit shuts down the DC output terminals automatically. This prevents deep discharge that permanently damages sealed lead-acid batteries — a common and expensive failure mode when protection isn't built in.
- Overvoltage Protection: Output is protected against overvoltage conditions, reducing risk of damage to connected devices during fault conditions. Paired with the regulated and filtered output, downstream equipment sees clean, stable power under normal and transitional states.
- Operating Temperature 0°C to 49°C (32°F to 120°F): Rated for indoor environments including mechanical rooms and above-ceiling spaces that can see elevated temperatures. The 49°C ceiling is solid for most conditioned utility spaces; avoid installations in non-climate-controlled enclosures in summer environments where ambient can push past that ceiling.
- 120VAC / 60Hz Input, 4.5A Draw, 6.3A/250V Fused: Draws under 5A from a standard 20A branch circuit — no dedicated high-amperage circuit required. The 6.3A/250V input fuse is a standard replacement part, which matters for field serviceability.
Integration and Compatibility
The MAXFIT7F is compatible with Altronix's LINQ2 Network Communication Module, which adds remote monitoring, control, and diagnostics over IP — allowing you to check power supply status, battery health, and alarm conditions from a central management interface without running to the panel. This is particularly valuable in distributed deployments where the power supply is in a remote IDF or equipment closet. The LINQ2 is listed as an optional accessory; it is not included.
For security power supplies in access control deployments, verify that your downstream readers and door hardware are rated for 24VDC input and that combined draw stays within the 10A output ceiling. If your load budget is tighter, review the rest of the Altronix power family for output variants that match your specific project requirements. Consult your NVR or recorder documentation to confirm input voltage compatibility before connecting surveillance loads.
For installations requiring a larger battery reserve — up to 40AH or 65AH — Altronix supports external battery enclosures, though those configurations require a separate enclosure not included here. If your retention requirement exceeds what four internal 12AH batteries can deliver, plan for an external battery cabinet on your access control or surveillance power design.
Frequently Asked Questions
Q: Does the MAXFIT7F include batteries?
A: No. Batteries are sold separately. The unit supports up to four 12VDC/12AH sealed lead-acid or gel-type batteries within the BC750 enclosure. For higher capacity (40AH or 65AH), a separate external enclosure is required.
Q: What is the warranty on the MAXFIT7F?
A: Altronix offers a Lifetime Warranty on this product, as stated in their product documentation.
Q: Can the MAXFIT7F be monitored remotely?
A: Yes, with the optional LINQ2 Network Communication Module (sold separately). The LINQ2 adds IP-based monitoring, control, and reporting of power supply diagnostics. Without the LINQ2, supervision is available via the onboard Form C dry contacts for AC fail, low battery, and battery presence conditions.
Q: What type of batteries does the MAXFIT7F support?
A: The unit is compatible with sealed lead-acid (SLA) or gel-type batteries rated at 12VDC/12AH. Up to four batteries can be housed within the BC750 enclosure. Larger capacity batteries (40AH or 65AH) require a separate external enclosure.
Q: Is the MAXFIT7F suitable for fire alarm applications?
A: The unit includes a supervised Fire Alarm Disconnect with selectable latching or non-latching behavior and a 10K EOL resistor, which are standard requirements for fire alarm auxiliary power in many installations. Verify compliance with local AHJ requirements and NFPA 72 before specifying for fire alarm use.
Q: What are the enclosure dimensions for the MAXFIT7F?
A: The BC750 enclosure measures 16.5"W x 20.5"H x 6.25"D (419.1mm W x 520.7mm H x 158.8mm D). Product weight is 20.6 lbs.; shipping weight is 26 lbs.
The MAXFIT7F hits a practical sweet spot that I see integrators reach for repeatedly: you get a 24VDC regulated supply at 10A, an integrated battery charger, supervision contacts, and a properly sized wall-mount enclosure — all in one SKU. On projects where I've built access control or camera power panels from individual components, the BOM sprawl and coordination overhead adds up fast. The MAXFIT7F consolidates that into a single line item with a manufacturer warranty backing the whole assembly.
Technical Highlights:
- 10A @ 24VDC regulated output: At full load that's 240W of continuous regulated power — enough for a 16-camera 24V surveillance run or a multi-door access control panel with substantial electric hardware. The filtered and regulated design means PTZ cameras and electric strikes that draw transient surge current won't drag down voltage for other devices on the same supply.
- Up to 48AH internal battery capacity: Four 12AH batteries in the BC750 enclosure gives you real runtime — at a 5A average load that's roughly 8–9 hours of backup before the low-DC shutdown kicks in at 71–73% battery floor. That's the spec to anchor your AHJ-required backup runtime calculation on.
- Form C supervision contacts on AC fail and battery conditions: These are hardwired contacts, not just LED indicators. Wire them directly to your alarm panel's auxiliary zone inputs and you get remote annunciation of AC loss, low battery, and battery absence without adding a separate monitoring module.
Deployment Considerations:
- The LINQ2 network module is the right addition for any deployment where the MAXFIT7F is installed in a remote or unstaffed location — it adds IP-based diagnostics so you're not dispatching a tech to check battery health. Budget it on the BOM from day one rather than retrofitting later.
- The 49°C operating ceiling is adequate for most conditioned mechanical rooms, but verify ambient in summer months for above-ceiling or non-HVAC utility space installations — thermal runaway risk in sealed lead-acid batteries starts well below that point if the enclosure can't shed heat.
For a mid-size commercial building access control deployment — 4 to 8 doors, mixed mag-lock and electric-strike hardware, with a centralized panel room — the MAXFIT7F is the unit I'd specify as the primary 24V power source with LINQ2 for remote health monitoring and four internal batteries for overnight backup coverage.
