Frequently Asked Questions

Lead times depend on the equipment type, but one of Maddox’s strengths is a large in-stock supply of new, remanufactured, and rental transformers located in yards across the United States.

We can deliver transformers much faster than traditional OEM lead times.

Contact us for current availability.

Yes, our rental inventory can support:

• Planned outages
• Emergency replacements
• Temporary power needs
• Utility maintenance projects
• Construction projects

Rental transformers are available in a variety of voltages and kVA ratings.

Yes, Maddox provides emergency response services to help customers restore power quickly following equipment failures. We’ve provided transformers for customers with same day or next day delivery.

Contact our team if you need immediate assistance.

Transformer demand has surged due to data centers, renewable energy projects, electrification, grid upgrades, and industrial growth. At the same time, aging infrastructure, manufacturing constraints, and material shortages have pushed lead times across the industry to record levels.

More than half of U.S. distribution transformers are over 33 years old and nearing replacement. To support growing demand from EVs, data centers, and renewable energy projects, transformer capacity is expected to increase by as much as 260% by 2050.

Maddox helps customers avoid long delays with in-stock inventory, remanufactured transformers, and fast production options.

Yes. Maddox maintains inventory across a wide range of transformer types (padmount, substation, and dry-type transformers), voltages, and ratings to support planned projects and emergency replacement needs.

You can request a quote online or contact our sales team directly.To speed up the process, provide:

• kVA or MVA rating
• Primary voltage
• Secondary voltage
• Phase configuration
• Required delivery date
• Any project specifications or drawings

No. Maddox provides transformers to customers ranging from individual facilities purchasing a single transformer to data centers managing large-scale projects.

Yes, we have experience supporting projects outside the United States and can assist with export requirements and documentation.

Yes, we repair transformers from Maddox and other manufacturers.

Our team can evaluate your equipment and help determine whether repair or replacement is the better long-term option.

Yes. Maddox purchases surplus, retired, and used transformers from utilities, industrial facilities, contractors, and other organizations.

If you have transformers you no longer need, our team can evaluate them and provide a competitive offer.

Yes. Maddox supplies transformer parts and replacement components to support maintenance, repairs, and upgrades.

Contact our team with your transformer information or parts list, and we’ll help identify the components you need.

All new transformers are made to comply with current DOE efficiency requirements. Additional specifications may be available depending on project needs.

Yes, outdoor configurations are available for many transformer types and can be specified based on environmental conditions and application requirements.

Maddox’s fluid options include:

• Mineral oil
• FR3® Fluid

Our team can help determine the right choice for your application.

Yes. Maddox handles all the logistics for your order, including both standard and oversized equipment, at no additional cost to you.

Yes. A properly remanufactured transformer can provide years of reliable service. During the remanufacturing process, the transformer is inspected, repaired, tested, and restored to meet applicable industry standards. At Maddox, every remanufactured transformer undergoes comprehensive testing before shipment to help ensure dependable performance in the field.

Transformer sizing depends on the electrical load the transformer will serve. To determine the required kVA rating, you'll need information such as voltage, phase, and total load demand. Choosing the correct size helps ensure reliable operation and prevents overloading. If you're unsure what size transformer you need, the Maddox team can help calculate the appropriate kVA for your application.

The amount of spare capacity depends on your application and future growth plans. Many facilities leave additional capacity to accommodate load increases, equipment additions, or operational changes. Oversizing too much can increase costs, while undersizing can limit future expansion. A common approach is to size the transformer for current demand while allowing reasonable capacity for anticipated growth.

Customers work with Maddox because they need:

• Fast lead times for transformers
• Multiple options, including new, remanufactured, and custom equipment
• Technical expertise for complex applications
• Responsive support throughout the project lifecycle

Whether you’re planning a project or responding to an emergency, our team is here to help.

Maddox supports customers across a wide range of industries that rely on dependable power infrastructure, including:

• Data centers
• Distributors
• Manufacturing
• Bitcoin mining
• Oil and gas operations
• Battery storage projects
• Renewable energy projects
• Electrical contractors and distributors
• Commercial and institutional facilities
• Municipal and government organizations
• Engineering, procurement, and construction (EPC) firms

Whether you’re responding to an emergency outage, expanding existing infrastructure, or planning a new project, Maddox can provide transformer sales, rentals, remanufacturing, and technical support to help keep your project on schedule.