What a Week in Milwaukee Taught Me About the Solar Industry
I just got back from four days at the NABCEP CE Conference in Milwaukee. Canceled flight, rerouted through Baltimore, landed in a blizzard, and still showed up for eight hours of electrical code on the last day. That’s not a complaint. That’s the job.
Most solar contractors weren’t there. That’s not a criticism either. It’s just a fact, and it matters.
This post is not a session-by-session recap. I wrote those daily, and you can read them if you want the technical details. This is the wider lens. What a week of immersion with the most credentialed professionals in the solar industry tells you about where this industry is, where it’s going, and what it still needs to grow up about.
The Industry Is Splitting Into Two Tiers
There is a version of the solar industry that optimizes for volume. Install counts, states covered, and kilowatts bragged about at investor meetings. That version of the industry has done really well. It drove down panel prices, expanded product choices, created demand, and got solar onto millions of rooftops that otherwise wouldn’t have it.
It also left behind a lot of orphaned systems.
The Solar Insure presenter on Day 1 put a number on it: the average solar system has its first failure between 14 and 26 months after installation. Not year ten. Year one or two. And when that happens, the homeowner with a volume installer either gets lucky or gets ghosted.
The NABCEP community represents the other version of this industry. It’s not perfect, but it’s built around a different premise: that the relationship with the customer doesn’t end when the installation truck pulls away. That technical knowledge matters. That showing up when something breaks is not optional.
The gap between those two versions of the industry is widening. I know which side I want Florida Solar Design Group to be on, and it’s not the one that disappears after the install.
Power Control Systems Changed How We Design Interconnected Systems
This was the dominant technical theme of the entire week for the sessions I attended, and it deserves more than a paragraph.
Power Control Systems, or PCS, are defined in the NEC as systems that control or limit current flowing through conductors and equipment. That’s the technical definition. The practical meaning is that PCS allows us to design solar and battery systems that interconnect with the home’s electrical system in smarter, safer ways without necessarily requiring a main panel upgrade.
Here’s why that matters. For years, the standard approach to adding significant battery storage to a home was to either upgrade the panel or make a supply-side connection, tapping into the utility service conductors before the main breaker. Supply-side connections work, but they involve working on conductors that are always energized, even when the main breaker is off. That’s a real hazard. It requires careful work and an inspector who understands what they’re looking at.
PCS through Microgrid Interconnect Devices like the EG4 GridBOSS changes that. The MID sits between the utility and the panel and manages power flow intelligently, protecting the downstream wiring by ensuring the system never exceeds what the conductors are rated for. It’s safer, it’s more elegant, and it avoids the panel upgrade cost entirely in many cases.
This is not a niche feature. As EV charger adoption grows, load management becomes an economic necessity. As panels age and homeowners add loads they didn’t have five years ago, the ability to control and allocate power intelligently is going to be a selling point that serious installers use to differentiate from the box-hanging competition. PCS is already in the NEC, and it’s only going to become more central to how we design these systems.
Florida Is Behind on Battery Storage. Again.
I’ve said this before, and I’ll keep saying it. Florida consistently misses the cutoff for the latest codes and standards, and it costs homeowners here real options.
The 2026 edition of NFPA 855, the standard that governs energy storage system installation, significantly increases the allowable capacity limits for residential battery systems. The 2027 International Residential Code takes it further, removing capacity limits from the building code entirely and simply pointing to NFPA 855 as the governing standard.
Florida’s 9th Edition Fire Prevention Code, which takes effect December 31, 2026, references the 2023 edition of NFPA 855. Not the 2026 edition. The newer standard was released too late in Florida’s development cycle to be incorporated.
What that means practically: a homeowner in Southwest Florida who wants a battery system large enough to provide true whole-home backup through a multi-day power outage is going to run into capacity limits that are already considered outdated by the people who wrote the standards. The engineering rationale for those limits has been superseded. The safety data supports larger systems. But we’re stuck with the old numbers until the next adoption cycle.
I intend to make noise about this with local AHJs. The 90.4(B) pathway for special permission exists for exactly this kind of situation, and I plan to use it where I can. But the longer-term fix is Florida taking code adoption more seriously for a technology that is being installed at scale across this state right now.
Watching the Code Get Made
One of the more eye-opening experiences of the week was sitting in sessions with the people who actually write the NEC and NFPA 855. Not people who teach the code. People who argue over the language in committee rooms and then come to a conference room in Milwaukee to explain what they meant.
What becomes clear quickly is that the code is not a purely technical document. It’s a consensus document. Manufacturers, utilities, firefighters, AHJs, installers, engineers: they all have representation on these committees, and they all have interests. Sometimes those interests align with better safety outcomes. Sometimes they align with protecting a particular technology’s market position.
The MLPE example is instructive. Rapid shutdown requirements that emerged from legitimate fire safety concerns also happened to benefit certain manufacturers significantly. Some of those requirements delivered real safety value. Others had unintended consequences, including increased fire risk from certain module-level electronics in specific failure scenarios, which I covered in a recent post on this blog. The code codified a technology approach before the full picture was understood.
That’s not a scandal. That’s how consensus standards work. But it’s worth knowing as an installer and as a consumer. The code tells you what’s required. It doesn’t always tell you what’s optimal.
The Enphase and EG4 Story
Neither company hosted a technical session at the conference. Both had small booths. For very different reasons (from what I can tell).
Enphase is feeling real pressure from professional installers. Their pricing has long reflected the premium of their brand and their microinverter architecture. At this level of the industry, the serviceability of rooftop MLPE is a genuine concern. When a component fails on a system with thirty individual microinverters, someone has to go back on that roof. In the Southwest Florida heat. Possibly years after installation. That’s a real cost that doesn’t show up in the initial proposal.
We are installing Enphase less and less at Florida Solar Design Group. That’s not because it’s a bad product. In the right application, it’s an excellent product. It’s because there are now strong alternatives that offer competitive performance at better price points with simpler serviceability. We install what’s right for the specific situation. Enphase still shines in some cases, and we love their service and support. Their recent price reduction on battery products shows they are feeling the heat.
EG4 is a different story. They’re a relative newcomer working to shed a DIY brand reputation in a professional installer market. The GridBOSS MID is genuinely impressive technology that we have been installing. But the guy I met at dinner on Day 1 who hadn’t heard of EG4 told you everything you need to know about where they still stand in terms of professional mindshare. They’ve made real strides. The stigma is real. But we love the installer-friendly features, price point, service, and especially the off-grid features that make EG4 a real contender.
What’s interesting about both companies keeping their heads down at a conference like this is what it signals. Enphase is an industry giant navigating a market that has matured past the point where premium branding alone justifies the price gap. EG4 is a newer player, still earning the trust of the professionals who will recommend them to homeowners. Neither position is fatal. Both are worth watching.
The AI Conversation Nobody Is Having
There was almost no discussion of artificial intelligence at this conference. In a room full of technically sophisticated professionals who are almost certainly using AI tools in their work already, that gap stood out.
I’m not talking about the fear that AI will replace installation jobs. The boots-on-the-roof work is not going away. What I’m talking about is the design side, the code research side, the proposal side, the customer communication side. These are areas where AI is already changing how the best contractors operate, and the industry hasn’t had the public conversation about it yet.
We should. Solar contractors who are using these tools well are going to have a measurable productivity and quality advantage over those who aren’t. The conference curriculum would benefit from a dedicated session on this. I’d attend it.
This Industry Needs to Grow Up
Solar is not a young industry. The technology has been commercially viable for decades. The installation trade has been growing steadily for twenty years. We have certification bodies, codes and standards, professional associations, and established manufacturers. We have enough installed capacity in the United States to power millions of homes.
What we don’t yet have is the professional culture that matches all of that.
The HVAC trade is a useful comparison. It developed in the second half of the twentieth century from a fragmented collection of equipment installers into a mature trade with licensing, continuing education requirements, professional standards, and a reputation for technical competence. That maturation happened over decades, driven partly by code development, partly by equipment complexity, and partly by the industry demanding it of itself.
Solar is somewhere in the middle of that arc. The NABCEP community represents the leading edge of what a mature solar trade looks like: technically rigorous, committed to continuing education, accountable to the homeowner over the long term. The volume-installation end of the industry is still catching up.
The gap will close. It always does in trades that matter. But the professionals in this industry need to keep setting the standard, keep showing up at conferences like this one, and keep being the contractors that homeowners can call two years after installation when something goes wrong.
The Bottom Line
Four days in Milwaukee produced more useful content than most full years of routine work. PCS is changing how serious installers design interconnected systems. Florida’s code adoption lag is actively limiting what we can build for homeowners who need it. The people writing the codes are human, have interests, and don’t always agree. And the solar industry has the talent and the knowledge to be better than it often is.
If you’re a Southwest Florida homeowner thinking about solar or battery storage and you want to work with a contractor who was in Milwaukee in a blizzard voluntarily learning this stuff, you know where to find us.
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