Veteran Owned Small Business · CAGE 0P327 +1 (813) 996-2583 Engineering & Manufacturing in Land O' Lakes, FL, USA
Established 1987 · CAGE 0P327 · VOSB

Custom Power Supply Engineering & Manufacturing

Bespoke, Modified COTS, and MOTS Power Solutions Engineered to Solve Your Most Demanding Electrical, Thermal, and Environmental Constraints.

35+ Years Engineering Heritage
100+ Combined Power Design Years
MIL-STD 810, 461, 1275, 1399 & 704
ISO 9001 ANAB & PJR Certified
Custom Capabilities

Turnkey Custom Power Electronics for Global OEM & Defense Programs

When off-the-shelf power supplies fail to meet severe space restrictions, harsh operating environments, or strict electrical performance criteria, AJ's Power Source Inc. (AJPS) delivers fully tailored power solutions.

Since 1987, our U.S.-based engineering team has designed, tested, and manufactured custom AC-DC power supplies, DC-DC converters, DC-AC inverters, uninterruptible power supplies (UPS), and power distribution units (PDUs). From modified COTS/MOTS architectures to clean-sheet custom developments, we ensure high efficiency, extreme ruggedization, and full compliance with international standards.

  • Power Range: 400 Watts to 10,000+ Watts scalable power outputs.
  • Topologies & Form Factors: Rackmount (1U to 6U), Wall-mount, Modular Chassis, Pluggable N+1, Baseplate, and IP65/IP67 Sealed Enclosures.
  • Advanced Thermal Management: Conduction cooling, liquid cooling, and forced-air over sealed heat sinks.
  • Energy Storage Integration: Lithium Iron Phosphate (LiFePO4) and Sealed Lead Acid (SLA) battery chemistry compatibility.
Exploded view diagram of custom engineered rugged waterproof power supply architecture
Development Process

Our Engineering Path to Qualified Custom Hardware

A streamlined, risk-mitigated development lifecycle engineered specifically for international procurement teams, prime contractors, and high-reliability industrial builders.

01

1. Requirement Analysis

We review input/output voltages, power density, thermal budgets, transient profiles, mechanical footprint, connector preferences, and required environmental standards.

02

2. Architecture & COTS First

Our engineers evaluate if an existing qualified COTS or MOTS baseline can be modified, minimizing NRE charges, schedule risk, and qualification overhead.

03

3. CAD & Circuit Simulation

Electrical circuit topology, magnetics optimization, thermal modeling, and 3D mechanical chassis layouts are created and verified for client sign-off.

04

4. Prototype & Pre-Compliance

First-article prototypes are built under ISO 9001 guidelines and subjected to rigorous in-house testing for efficiency, regulation, thermal rise, and EMI pre-compliance.

05

5. Qualification Testing

Environmental and electrical qualification is performed against MIL-STD-810, MIL-STD-461, MIL-STD-1275, MIL-STD-704, or UL/CE specifications with formal data packages.

06

6. Production & Lifecycle Support

Full-scale manufacturing, component obsolescence monitoring, form-fit-function redesigns, and global technical support protect your program for decades.

Industry Applications

Tailored Power Solutions Across Key Sectors

Our custom engineering capability serves diverse sectors that demand zero-downtime reliability under harsh physical and electrical conditions.

Custom military tactical ground power supply solution

Military & Tactical Systems

Ground vehicle supplies, tactical shelters, radar systems, and battlefield C4ISR equipment built to endure severe shock, vibration, and EMI transients.

Custom aerospace airborne power supply system

Aerospace & Avionics

Lightweight, high-power-density AC-DC and DC-DC systems designed for 400 Hz airborne buses, emergency power hold-up, and flight-critical avionics racks.

Custom industrial rugged power supply platform

Industrial & Heavy Automation

Continuous-duty power supplies for power plants, oil & gas fields, mining machinery, robotics, and industrial process control rooms.

Custom commercial grade high efficiency power supply

Commercial & Medical

High-efficiency power conversion for specialized commercial displays, medical equipment, broadcast stations, and renewable energy storage systems.

Custom telecom data center backup power unit

Telecom & Data Centers

High-density DC distribution, rackmount UPS units, and outdoor cabinet power modules engineered for remote communication towers and data hubs.

Custom sealed submersible IP67 waterproof power supply

Sealed & Submersible Systems

IP65 and IP67 waterproof, fully potted enclosures equipped with MIL-spec circular connectors for deck-mounted and outdoor installations.

Technical Capabilities

Custom Engineering Parameters & Customizations

Every aspect of our power conversion platforms can be modified or custom-engineered to align precisely with your technical specification.

Custom Power Supply Engineering Parameters Matrix
Customization Category Available Options & Scope Primary Engineering Benefit
Input Voltage Ranges 115/230 VAC (50/60/400 Hz), 28 VDC, 48 VDC, 270 VDC, Wide-Range Universal AC Compatibility with military vehicle, naval shipboard, airborne, or global utility grids.
Output Configurations Single or multi-rail outputs (1.2 VDC to 600 VDC), custom regulation tolerances, isolation Direct power matching for sensitive FPGA, RF transmitter, and computing loads.
Mechanical Packaging 1U-6U 19" Rackmount, Half-Rack, Wall-mount, Shoe-box chassis, Custom CAD footprints Optimal volumetric efficiency within tightly space-constrained enclosures.
Ingress Protection & Cooling IP65, IP67 fully potted/submersible, liquid cold-plate, conduction, forced air Reliable continuous operation in sand, dust, water immersion, and extreme thermal conditions.
Redundancy & Hold-Up N+1 hot-swappable modules, active current sharing, extended hold-up capacitors Zero-downtime uninterrupted system availability during main power transfer transients.
Interconnects & Signals MIL-DTL-38999 circular connectors, DB pins, terminal blocks, SNMP/CANbus monitoring Fast installation, rapid maintenance swaps, and comprehensive remote status reporting.
Field-Proven Hardware

Featured Custom Engineering Projects

Examples of custom power supplies designed and qualified by AJPS to solve demanding operational challenges.

2500W · 28 VDC Military Vehicle Power Supply 2500W Custom Build

Military Vehicle Power Supply (2500W)

Engineered for tactical armored vehicles operating on 28 VDC battery buses. Features robust transient clamping and high efficiency in a compact chassis.

  • Input Voltage: 22 VDC – 32 VDC (MIL-STD-1275)
  • Output Power: 2500 Watts continuous rated
  • Enclosure: Ruggedized chassis with conduction cooling
1U Rackmount 1U Rackmount AC to Multiple DC Outputs Custom Power Supply

1U Rack AC to Multi-DC Power System

Designed for defense command centers requiring clean multi-rail DC outputs from a single 115 VAC power input within a tight 20" rack depth.

  • Input: 115 VAC universal grid / generator input
  • Outputs: 8 independent regulated 12 VDC rails
  • Filtering: Enhanced EMI filter meeting MIL-STD-461
Airborne · 80W 80 Watts Power Conditioner for Aerospace Avionics

80W Avionics Power Conditioner

Custom airborne power conditioner engineered to protect critical flight computers from power interrupts, spikes, and abnormal bus conditions.

  • Compliance: MIL-STD-704F airborne bus qualified
  • Interconnect: DB-9 pin heavy-duty connector
  • Output: 19.5 VDC ± 2% up to 6 Amps output
Proven Experience & Authority

Why International Procurement Teams Trust AJPS

Selecting a custom power supply manufacturer is a critical decision. AJ's Power Source brings over three decades of engineering pedigree, U.S. manufacturing authority, and comprehensive quality accreditations to guarantee program success.

  • Veteran Owned Small Business (VOSB): Established in 1987 in Land O' Lakes, Florida, USA (CAGE Code: 0P327).
  • Deep Technical Expertise: Our senior engineering staff averages over 25 years per engineer in high-reliability power design.
  • ISO 9001 Quality System: Fully accredited quality management system registered through Perry Johnson Registrars (PJR) with ANAB accreditation.
  • Complete Engineering Artifacts: We provide full documentation packages including 3D CAD models, schematics, ATP test reports, and compliance certificates.

Rapid Design-In

3D STEP files and mechanical drawings delivered early for fast cabinet integration.

Export Readiness

Full support for international defense primes, country-of-origin documentation, and compliance data.

Obsolescence Control

Proactive component monitoring ensures long-term multi-decade production continuity.

In-House Testing

Comprehensive pre-compliance testing for EMI, thermal, load dump, and environmental bounds.

Technical FAQ

Frequently Asked Questions by Technical Buyers

Answers to key questions regarding custom power supply procurement, NRE, testing, and compliance.

A modified COTS (Commercial Off-The-Shelf) power supply utilizes an existing, field-proven baseline chassis and modifies specific features such as output voltage rails, connectors, mounting brackets, hold-up time, or conformal coating. This significantly reduces Non-Recurring Engineering (NRE) costs and delivery lead times. A full custom design is developed from a clean sheet when mechanical envelopes, thermal constraints, or electrical specs cannot be met by modified standard hardware.

Our engineering team designs custom power systems to comply with MIL-STD-810 (Environmental), MIL-STD-461 (EMI/EMC), MIL-STD-1275 (28 VDC Vehicle Power), MIL-STD-1399 Section 300 (Shipboard AC Power), MIL-STD-704 (Airborne Power Quality), MIL-S-901 (High-Impact Shock), as well as commercial safety standards including UL, CE, and TUV.

We engineer power solutions from 400 Watts up to 10,000+ Watts across single and multi-channel AC-DC power supplies, DC-DC converters, DC-AC inverters, online UPS systems, and power distribution units (PDUs) in rackmount, chassis, or IP67 sealed configurations.

We provide full technical documentation, 3D CAD step files, electrical data sheets, compliance declarations, and export compliance assistance (CAGE Code 0P327) to support prime contractors, original equipment manufacturers (OEMs), and system integrators worldwide.

Start Your Custom Power Engineering Project

Have specific power supply specifications, space envelopes, or compliance targets? Speak directly with our senior power engineers to review your electrical and mechanical requirements.

Direct Engineering Line: +1 (813) 996-2583 | Land O' Lakes, Florida, USA

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