Should OEM manufacturers build electrical control panels in-house or buy them from a manufacturer?

For some manufacturers, building electrical control panels in-house is still the right call. But for many boat builders and specialty vehicle OEMs, that decision was made years ago under different conditions: lower volumes, simpler builds, and easier component sourcing. As the industry has changed, the math behind building in-house often no longer holds up, making it worth revisiting the make-or-buy decision with the full picture of cost, risk, and strategy.

What hidden risks come with building marine electrical panels in-house?

Building marine electrical panels in-house exposes manufacturers to disruptions that never show up on a spreadsheet: a single backordered component (such as a 15-amp breaker) can stop an entire production line, idle skilled labor, delay promised delivery dates, and quietly erode margins, timelines, team morale, and reputation. These procurement, inventory, quality, and warranty costs sit beneath the bill of materials.

When does it make sense to partner with an electrical panel manufacturer instead of building panels in-house?

Partnering with a dedicated electrical panel manufacturer often makes sense when component sourcing has grown complex, when in-house panel production pulls focus from your core product, or when you want to replace dozens of part numbers with a single one. A hybrid model, buying some panels while building others, lets OEMs weigh procurement burden, inventory carrying cost, and warranty exposure against the value of building what they do best.

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Stop Building Panels.
Continue Building What You Build Best.

A Manufacturer's Guide to the Make-or-Buy Decision for Electrical Control Panels

By Paneltronics, Inc. | Trusted Authority in Electrical Control Panels and Assemblies Since 1979

Tuesday, June 16, 2026

Estimated read time: 5 Minutes

Part 1 of 3: The Conversation Every OEM Manufacturer Should Have

Manufacturer disruption scenario involving marine electrical power distribution panels and unavailable circuit breakers

Figure 1. The Tuesday-morning scenario every manufacturer recognizes.

Introduction

Picture this.

It’s a Tuesday morning, and your OEM production floor is humming along. Boat builds are moving down the line, specialty vehicle assemblies are coming together, and your team is hitting a solid pace. Then someone walks over and says, “Hey, we’re out of the 15-AMP breakers for the electrical power distribution panels.”

Just like that, everything stops. Not the whole plant, of course. But that one boat or specialty vehicle production line is stopped and cannot move forward. It’s going nowhere today. Your purchasing agent is already on the phone trying to track down a replacement. Your electrician is standing around with nothing to do. And the delivery date you promised your customer? That’s now a conversation nobody wants to have.

If you’ve been in manufacturing long enough, this scenario isn’t hypothetical. It’s a Monday. Or a Wednesday. It’s the kind of disruption that never shows up on a spreadsheet but quietly eats into your margins, timelines, team morale, and sometimes your company's reputation.

And here’s the thing: it almost always traces back to one decision that was made so long ago, nobody even questions it anymore. The decision to build your own electrical panels in-house.

Why We’re Writing This

At Paneltronics, we’ve been designing and manufacturing electrical control panels and power distribution units (PDUs) for over 47 years. In that time, we’ve worked alongside boat builders, specialty vehicle manufacturers, and OEMs of all sizes, from small shops running ten units a year to production lines pushing thousands.

One conversation often comes up: “We’ve always made our own panels in-house. Why would we change now?”

It’s a fair question. And honestly, for some manufacturers, building in-house might be the right call. But for many others, it’s a decision that was made years ago under very different circumstances, back when volumes were lower, boats and specialty vehicles were simpler, and components were easier to source. The industry has changed, and the math behind that original decision may no longer hold up as it once did.

This blog isn’t a sales pitch. It’s a conversation. The kind you’d have over a cup of coffee at a trade show or during a walk through the plant floor with a colleague. We want to lay out the real factors, such as the numbers, the risks, and the strategic considerations, that go into the make-or-buy decision for electrical panels. That way, whether you decide to keep building in-house or partner with a panel manufacturer, you’re making that choice with the full picture in front of you.

What We’ll Cover

In this first installment, we set the stage. We look at why so many manufacturers are revisiting the make-or-buy decision for their electrical control panels, what has changed in the industry over the past decade, and why the math behind your original decision to build in-house may deserve a second look.

Bill of materials and hidden cost drivers beneath marine electrical panel procurement

Figure 2. The BOM is the tip. The hidden costs are everything underneath.

In Part 2, we’ll dig into the real costs that don’t show up on the bill of materials, from the procurement burden to inventory carrying costs, quality, and warranty exposure. Then in Part 3, we’ll explore the partner approach: what it actually looks like to work with a dedicated panel manufacturer, how the hybrid model works in practice, and the questions you should ask when evaluating whether to make or buy.

Three-part series overview for a make-or-buy guide for electrical control panels

Figure 3. Where this post sits in the three-part series.

Whether you’re an engineer evaluating your current panel designs, a purchasing agent tired of chasing down backordered components, or a decision-maker looking at the big picture, this one’s for you.

About the author

Edwin (Ed) Robledo, Paneltronics Senior Technical Marketing. 10+ years of published content creation and technical writing in the electrical and electronics industry, including articles and white papers on circuit, electrical design, and engineering best practices. Connect on LinkedIn

In collaboration with:
Pedro Pelaez, President of Paneltronics

Stop Building Panels.Continue Building What You Build Best.