Firefighters Endorse Safer Solar Tech Amid Growing Rooftop Risks

By Brian Nelson

FREMONT, CA – January 27, 2026 – As solar panels become a ubiquitous feature on American homes, the first responders who navigate emergencies in these structures are voicing a clear preference for safer technology. A recent announcement from global energy technology company Enphase Energy has brought this issue into sharp focus, revealing that over 98% of firefighters who participated in specialized training would recommend microinverter-based solar systems over traditional designs.

This feedback, gathered from hundreds of firefighters across multiple states following Solar and Fire Education (SAFE) training, underscores a critical and often overlooked aspect of the green energy transition: the safety of those who must operate around these systems in a crisis. The results highlight a growing consensus among trained professionals that not all solar systems are created equal when the siren sounds.

The High-Voltage Dilemma on the Rooftop

For decades, the standard for residential solar has been the “string inverter” system. This design links multiple solar panels together in a series, creating a high-voltage Direct Current (DC) circuit that runs across the roof and down into a single, centralized inverter box that converts the power to household Alternating Current (AC). While effective, this architecture presents a persistent hazard for firefighters.

Even when the main power is cut, the DC wiring on the roof remains energized as long as the sun is shining, carrying up to 1,000 volts of electricity. This creates a dangerous environment for firefighters who may need to cut ventilation holes in a roof or clear a path, facing a constant risk of lethal electric shock.

Enphase's microinverter technology fundamentally changes this equation. Instead of one central inverter, a small microinverter is installed beneath each individual solar panel. This device converts the low-voltage DC power into standard AC power right at the source. Consequently, the high-voltage DC wiring that poses such a threat in string systems is eliminated entirely. The result is a standard, low-voltage AC system on the roof, akin to any other household wiring.

“Solar is becoming a standard feature on rooftops across the country, and firefighter training must evolve alongside it,” said Richard Birt, a retired fire captain and founder of the SAFE training program, who also consults for Enphase. “Based on my conversations with firefighters, when they understand how microinverter-based systems work – including the elimination of high-voltage DC on the roof and built-in safety features – many view them as a more straightforward option during emergency response.”

How Safety Codes Are Reshaping Solar Technology

The concerns raised by firefighters have not gone unnoticed by regulatory bodies. The National Electrical Code (NEC), the benchmark for safe electrical design in the U.S., has progressively tightened its requirements. The introduction of “rapid shutdown” standards, particularly in the 2017 edition of the code, has been a game-changer.

NEC 2017 mandates module-level rapid shutdown, which requires that the voltage of conductors within the solar array boundary be reduced to safe levels (under 80 volts) within 30 seconds of activation. This ensures that firefighters can de-energize a roof quickly and effectively.

For traditional string inverter systems, meeting this standard requires adding extra components known as Module-Level Power Electronics (MLPEs), such as power optimizers, at each panel. These devices can shut down the voltage of individual panels, but they add complexity and cost to the installation.

Microinverter systems, by their very nature, comply with these stringent rapid shutdown requirements out of the box. Because the DC-to-AC conversion happens at the panel, simply shutting off the AC circuit breaker de-energizes the entire rooftop system. This built-in safety feature, without the need for additional components, is a key reason for the strong endorsement from trained first responders.

“Safety is foundational to how we design energy systems for homes and businesses, and it is inseparable from the work firefighters do every day to protect their communities,” said Marco Krapels, chief marketing officer at Enphase Energy.

Training on the Front Lines: Bridging the Knowledge Gap

Advanced technology alone is not a complete solution; education is the other crucial pillar of firefighter safety. The proliferation of solar and, increasingly, home battery storage, has created a significant knowledge gap for many fire departments. Programs like SAFE are designed to fill it by providing hands-on training that simulates real-world emergency scenarios.

This need is recognized across the industry. The International Association of Fire Fighters (IAFF) and the UL Fire Safety Research Institute (FSRI) also offer training programs to help first responders understand the unique hazards of modern energy systems. Captain Andrew Martinez of the San Mateo Consolidated Fire Department noted in a video featured by SAFE that such training is critical for reducing uncertainty during incidents. He explained that his department is actively working to incorporate these learnings into its official safety policies, including a preference for systems like microinverters that avoid high-voltage DC on the roof.

A New Standard for Residential Safety?

The positive reception from firefighters is more than just a public relations win for one company; it may signal a broader shift in the solar industry toward inherently safer designs. As homeowners become more educated about the technology they are installing, the safety profile of different inverter types is likely to become a more significant factor in their purchasing decisions.

Competitors in the string inverter space, such as SolarEdge, have successfully addressed NEC requirements by making power optimizers a core part of their systems. While this meets the letter of the law for rapid shutdown, the fundamental difference remains: these systems still manage high-voltage DC on the roof, whereas microinverters do not. For many in the fire service, this distinction is paramount.

While solar panel fires remain statistically rare and are most often linked to faulty installation rather than the technology itself, the push for enhanced safety is undeniable. As the solar market continues its rapid expansion, the dialogue is moving beyond simple energy production to a more holistic view that includes reliability, longevity, and the safety of the people living with and working around these powerful systems.