Maine Plug-In Solar Law (LD 1730): What Renter & Homeowners Need to Know in 2026

Updated April 13, 2026

With electricity costs rising across Maine, more homeowners and renters are looking for ways to reduce their energy use, especially when rooftop solar isn’t an option.

Maine lawmakers have passed legislation known as the Maine plug-in solar law (LD 1730), and Governor Janet Mills has signed it into law on April 6, 2026. The bill received bipartisan support in both the House and Senate.

Plug-in solar is getting attention, but it’s still early. These systems aren’t currently in use in Maine, and there isn’t a clear pathway for them yet. For now, it’s not something homeowners or renters should assume they can simply purchase and plug in.

As this law moves into implementation, product standards are still being finalized. Plug-in solar systems will need to meet new safety certifications (UL 3700), and those compliant products are expected to become available later this year.

So what exactly is plug-in solar—and what does this new law mean as it moves forward?

What Is Plug-In Solar in Maine?

Often referred to as “plug-in solar” or “balcony solar,” these systems are small, portable setups.
These systems are typically one to four panels and can be placed on a deck, yard, or balcony.

While these systems are designed to connect through an outlet, LD 1730 is expected to require involvement from a licensed electrician to ensure they are installed safely and work properly with your home’s electrical system.

Unlike rooftop solar, there’s no permanent installation or roof access required, and the upfront cost is much lower.

They’re designed primarily for renters, apartment buildings, condos, and homes where rooftop solar isn’t an option.

Are Plug-In Solar Systems Available in Maine?

Not yet—but this is starting to change.

With LD 1730 now signed into law, Maine is creating a formal pathway for plug-in solar systems. However, key details like product standards, electrical code requirements, and utility coordination will still need to be finalized before these systems are widely available.

In a state like Maine—where housing stock is older and many residents rent—options like this are getting more attention. At the same time, there’s still more to understand with clearer guidance around safety, utility coordination, and electrical code.

For now, plug-in solar is still best understood as an emerging option.

What Plug-In Solar Can (and Can’t) Do

Plug-in solar is designed to offset a small portion of your electricity use—not power your entire home. These systems are limited in size—often around 800 to 1200 watts—which is why their overall impact is relatively small.

In most cases, the energy produced is comparable to running a window AC unit, a hair dryer, or a few everyday household loads.
In practical terms, it’s closer to offsetting a few daytime loads rather than significantly reducing your overall electric bill. These systems are not eligible for net energy billing, so excess generation does not receive credit.

For homeowners with good sun exposure, rooftop solar remains the most impactful way to offset electricity use. If you’re comparing plug-in solar to a full rooftop system, you can learn more about how solar works in Maine and what to expect here.

Why Installation Still Matters

Even though these systems are designed to plug into an outlet, they interact with your home’s electrical system in a different way than traditional appliances.

One of the key considerations is how electricity flows back into a circuit. In some cases, that can introduce more current than the wiring or breaker was originally designed to handle—especially in older homes.

That’s why this law is expected to require involvement from a licensed electrician, particularly for larger systems above 420 watts. In some cases, this may also include using a dedicated circuit to safely handle the way electricity flows through the system—helping ensure everything is installed safely and working properly with your home.

Why This Matters for Maine

Even with those limitations, this law is important.

It opens the door for renters and others who haven’t traditionally had access to solar. It gives more people a way to start thinking about how they use—and reduce—their electricity.

A key part of LD 1730 allows these systems to operate without the formal utility interconnection process required for rooftop solar systems, helping make them simpler to adopt.

The goal is to expand access without adding costs to other ratepayers, while allowing smaller systems to operate more simply.

It’s not a full solution, but it is a meaningful step toward broader access to solar for more Mainers.

What This Means Going Forward

Plug-in solar is still being introduced in Maine, and the details will continue to evolve.

Now that LD 1730 has been signed into law, the next phase will focus on implementation—finalizing rules, product standards, and installation requirements. We’ll continue to update this post as guidance becomes clearer

If you’re interested in plug-in solar as it becomes available in Maine, feel free to reach out—we’re happy to share updates and talk through what solar options may make sense as this develops.

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