Balcony and plug-in solar has been quietly taking off across the country, but for a long time it lived in a bit of a gray area — great idea, murky safety standards. That changed with the arrival of UL 3700, the first dedicated safety standard for plug-in photovoltaic (PV) systems, and the APsystems EZ1 microinverter, one of the first products certified to meet it. If you've been curious about setting up a small solar system on an apartment balcony, a patio, or a garage wall without a full rooftop installation, this is the moment the category grew up. Here's what's changed, why it matters, and how Solwel can help you get started in Houston or Dallas.
What Is UL 3700, and Why Should You Care?
UL 3700 is a safety standard developed specifically for "plug-in PV systems" — small solar setups designed to connect directly to a standard wall outlet rather than being hardwired into your home's electrical panel by a licensed electrician. Before this standard existed, plug-in solar products were being sold in the U.S. without a clear, dedicated safety framework, which left homeowners, renters, and property managers unsure of what "safe" actually meant for this category.
UL 3700 changes that by setting requirements around things like anti-islanding protection (so the system automatically shuts off during a power outage, protecting utility workers), ground fault detection, proper output limiting so you don't overload a household circuit, and overall build quality of the enclosure and connectors. In plain terms: a UL 3700-certified product has been independently tested to confirm it won't overpower your outlet, won't backfeed power into the grid during an outage, and is built to handle real outdoor conditions like rain, wind, and temperature swings.
For homeowners and renters, that certification is the difference between a product you can trust and one you're taking a chance on. It's also increasingly what local jurisdictions and HOAs look for when deciding whether to allow plug-in solar setups at all.
Meet the APsystems EZ1: Plug-and-Play Solar, Done Right
The APsystems EZ1 microinverter is CSA Certified to UL 3700 standards, making it one of the most trusted options on the market for balcony and portable solar. What makes the EZ1 stand out isn't just the certification — it's how genuinely simple the system is to use.
The EZ1 connects to two solar panels and plugs directly into a standard household outlet using its included 5-meter power cord. There's no rewiring, no panel upgrade, and no need to open up your breaker box. It features dual independent MPPT (maximum power point tracking) channels, so each connected panel performs at its best even if one is partially shaded or angled differently than the other — a common scenario on balconies and patios where sun exposure isn't always uniform.
The EZ1 also includes built-in Wi-Fi and Bluetooth, paired with the AP EasyPower App, so you can monitor your system's real-time energy production right from your phone. It's backed by a 12-year warranty, giving you long-term confidence in a product designed for renters, homeowners, and DIYers alike.
Why This Matters for Renters and Space-Limited Homes
A huge number of people who want to go solar simply don't have the option of a full rooftop system — they're renting, living in a townhome with a shared roof, or working with a small patio or balcony. Plug-in solar paired with UL 3700 certification opens the door for these households to start generating their own power without a major installation project or landlord approval for permanent roof changes.
It's also a great entry point for homeowners who want to test the waters with solar before committing to a larger system, or who want to offset energy use for a specific area of the home, like a home office or workshop, without a full-scale installation.
Getting Started with Balcony Solar in Houston or Dallas
Texas gets a lot of sun, which makes it an especially good fit for plug-in solar — even a couple of well-placed panels on a south- or west-facing balcony can make a meaningful dent in your monthly electric bill. If you're in the Houston area, stop by our location at 4620 S Sam Houston Pkwy W, STE 450, Houston, TX 77053, or give us a call at (346) 432-4228. In the Dallas–Fort Worth area, visit us at 350 S Belt Line Rd, STE 108, Irving, TX 75060, or reach us at (469) 773-1219.
Our team can walk you through panel selection, help you understand local rules around plug-in systems, and get you set up with a UL 3700-certified EZ1 system that's ready to plug in and start producing power.
Interested in learning more or placing an order? Shop our products here