22/08/2026
😊👍👍
Finally, it is here after decades ...!!!
Hoymiles has introduced the first UL 3700-listed plug-in balcony solar microinverter in the United States, marking a major step toward legalizing plug-and-play residential solar. The HiFlow Pro plugs directly into a standard 120-volt household outlet, allowing homeowners and renters to generate electricity without a traditional rooftop installation.
The microinverter complies with the new UL 3700 safety standard, published in late 2025 specifically for plug-in photovoltaic systems. It includes anti-islanding protection that automatically disconnects during power outages, improving safety for utility workers and making plug-in solar easier for utilities and regulators to approve.
A typical balcony solar system consists of one or two solar panels connected to the HiFlow Pro microinverter, which converts DC power into grid-compatible AC electricity. Multiple units can be connected in parallel, allowing a maximum combined output of up to 1,200 watts, enough to offset a meaningful portion of a home's daytime electricity consumption.
Currently, plug-in balcony solar is gaining momentum across the U.S. Eight states have already enacted enabling legislation, while many others are considering similar laws. The technology is already widely used in Europe, especially Germany, where millions of balcony solar systems have been installed to help reduce household electricity bills.
Although the HiFlow Pro is a microinverter rather than an energy storage system and therefore provides no battery storage, it enables safe, low-cost distributed solar generation using existing household outlets. The launch represents an important milestone for expanding affordable rooftop and balcony solar access to renters, apartment residents, and homeowners across the United States.
