Are Solar Panels Dangerous to Your Health?

Solar panels sitting on a rooftop pose no meaningful health risk to the people living beneath them during normal operation. The electromagnetic fields they produce fall well within international safety limits, the sealed materials inside them stay contained unless physically broken, and the panels themselves generate electricity silently without combustion or emissions. That said, solar energy systems are not entirely without hazard. The risks that do exist tend to cluster around specific scenarios: manufacturing facilities, house fires, end-of-life disposal, and certain installation or maintenance mistakes. Understanding where those risks actually sit, and how large they are, helps separate legitimate concerns from the unfounded ones.

Do Solar Panels Give Off Harmful Radiation?

This is probably the most common health worry people have about rooftop solar, and the evidence is reassuring. Solar photovoltaic systems produce electromagnetic fields (EMF) at various points in the system, particularly near inverters and transformers. A study measuring EMF at commercial solar facilities found that static magnetic fields were very small compared to exposure limits set by IEEE and ICNIRP, and that radiofrequency fields in the 5 to 100 kHz range were associated with inverters but complied in every case with occupational exposure limits. Electric fields were negligible across the spectrum measured.¹ Those are the limits for workers who spend all day near the equipment. For a homeowner whose panels are on the roof and whose inverter is in the garage, the exposure is even lower.

The confusion here sometimes stems from conflating solar panels with cell towers or power lines. Solar panels produce direct current, which generates static or very-low-frequency fields rather than the higher-frequency radio waves that drive most EMF health debates. The inverter converts that DC to AC for your home’s wiring, and that conversion does produce some higher-frequency fields, but they drop off sharply with distance and remain within safety standards even at close range.

What Chemicals Are Inside Solar Panels?

The dominant technology on the residential market is crystalline silicon, which makes up over 90 percent of panels sold worldwide. Silicon itself is not toxic. The concern with these panels centers on trace amounts of lead in the solder and small quantities of other metals in the wiring and frame. Under normal use, these materials are sealed behind glass and encapsulant layers and do not come into contact with anyone.

Thin-film technologies are where the chemistry gets more interesting. Cadmium telluride (CdTe) panels contain cadmium, a known toxic metal, bonded with tellurium. Copper indium gallium selenide (CIGS) panels contain selenium, molybdenum, and other metals. A study testing CIGS cell leachates found that under acidic conditions simulating acid rain, metals including iron, copper, zinc, molybdenum, cadmium, silver, and tin were present in the leachate at concentrations up to several thousand micrograms per liter.² In practice, these panels are sealed and intact on your roof, so the leaching scenario only matters if the glass shatters or the panel ends up in a landfill.

A newer technology still mostly in the research phase is the perovskite solar cell, which contains lead as a core component. Broken perovskite cells released lead at around 1 mg/L under standard toxicity testing, from both broken and unbroken cells, though the concentrations stayed within regulatory toxicity limits. Encapsulation reduced but did not completely eliminate the release.³ Extreme weather like heavy rain or high heat could accelerate the breakdown of perovskite film and cause lead to leach into the surrounding environment.⁴ Perovskite panels are not yet a commercial rooftop product, but as they approach the market, this lead issue is something regulators and manufacturers are actively working to solve.

The PFAS Question

You may have seen headlines linking solar panels to PFAS, the group of synthetic chemicals sometimes called “forever chemicals” because they persist in the environment and the human body. Some solar panels use fluoropolymer materials in their backsheets or as coatings on the glass. A health risk assessment of PFAS in photovoltaic modules found that the fluoropolymers used in solar panels are considered a low-risk subgroup of PFAS, and point-based risk assessment showed no risk for specific PFAS compounds including PFOA, PFOS, and GenX from solar modules.⁵ The distinction matters: fluoropolymers are large, stable polymer chains that behave very differently from the smaller, more mobile PFAS compounds that have caused drinking water contamination. Lumping all fluorinated compounds together overstates the concern.

Electrical Hazards During Installation and Maintenance

Solar panels generate electricity whenever light hits them. You cannot turn them off. This creates a genuine hazard for installers, maintenance workers, and especially firefighters. A rooftop array can produce hundreds of volts of direct current, and unlike AC systems, DC does not have a natural zero-crossing point where the current momentarily drops, which can make it harder for a person to release their grip during a shock. A case report documented the death of a solar panel worker in an industrial setting who was electrocuted by high-voltage DC while wearing only shoes as protective equipment.⁶

For firefighters, the risk is compounded. When a building with rooftop solar catches fire, the panels keep producing voltage, and using water to suppress the fire introduces the possibility of electrical current traveling through the water stream.⁷ Modern electrical codes in many countries now require rapid shutdown devices that reduce panel-level voltage within seconds of a system disconnect, specifically to protect first responders. If you have an older system installed before these codes took effect, it may be worth asking your installer about retrofit options.

What Happens When Solar Panels Catch Fire

Solar panels themselves do not spontaneously combust. The concern is what happens when they are involved in a building fire that started for other reasons. The polymer encapsulants and backsheet materials in panels can release toxic gases when they burn, including sulfur dioxide, hydrogen fluoride, hydrogen cyanide, and volatile organic compounds.⁸ Higher external heat intensifies the emissions.⁹

How worried should you be? An analysis of fire scenarios involving cadmium-based thin-film panels found that the health risks from combustion by-products should not be large, especially from residential-scale arrays. For larger commercial installations, the risks are higher simply because more material is burning, and the study recommended that residents within a couple of kilometers of such a fire stay indoors with windows closed as a simple precaution.¹⁰ For a typical house fire, the solar panels on the roof add to the cocktail of toxic fumes from burning insulation, plastics, and furniture, but they are not the dominant source of danger.

Risks for Manufacturing Workers

The health concerns that are best documented involve people who make solar panels, not people who use them. The photovoltaic industry uses smaller amounts of toxic and flammable substances than many other manufacturing sectors, but the chemicals involved still present occupational hazards.¹¹ Workers producing cadmium-based thin-film panels face potential exposure to airborne arsenic and cadmium compounds. A study of a thin-film manufacturing facility found that routine operations kept exposures well below threshold limit values, but maintenance and laboratory activities could push concentrations much higher. Even so, biological monitoring of the workers did not show significant occupationally related arsenic or cadmium intake compared to unexposed workers.¹² The takeaway is that proper containment and protective equipment work, but corners cut during maintenance can create real exposure.

End-of-Life Panels and Landfill Concerns

Solar panels last roughly 25 to 30 years, and millions of them will start reaching end of life in the coming decades. What happens if they end up in landfills? For CdTe thin-film panels specifically, a study simulating acidic landfill conditions found that over 30 days, about 73 percent of the cadmium leached out, with dissolved cadmium concentrations more than three times the regulatory limit and hundreds of times higher than the EPA’s maximum contaminant level for drinking water.¹³ Under the less acidic conditions that develop later in a landfill’s life cycle, cadmium release was negligible.

A broader risk assessment found that at current production volumes, landfill disposal of CdTe panels does not pose a human health hazard, though the results emphasized the importance of managing end-of-life panels properly, and noted there could be potential risks associated with recycling if not done carefully.¹⁴ For crystalline silicon panels, an ecological risk assessment found significant soil contamination potential for aluminum, silver, cadmium, iron, and lead from leaching, though groundwater contamination was not significant.¹⁵

The practical message here is that the waste question is real but manageable. Recycling infrastructure for solar panels is growing, driven partly by regulations like the European Union’s WEEE directive, which already requires panel recycling. In the U.S., the regulatory landscape is patchier, with only a few states mandating recycling so far. If you are decommissioning panels, checking whether a manufacturer take-back program exists is the simplest step.

Glare and Vision Safety

Standard rooftop solar panels are designed to absorb sunlight rather than reflect it, so glare is minimal for most installations. The issue comes up more with concentrated solar power facilities and ground-mounted arrays near airports. A study of glare from solar installations near airports found that the potential hazard for pilots and air-traffic control personnel can range from discomfort to temporary disability, with metrics for both permanent eye damage and temporary after-image effects.¹⁶ In large concentrated solar plants that use mirrors to focus sunlight onto a central receiver, looking directly at a heliostat surface carries a significant potential for temporary visual effects.¹⁷ For a residential system, this is essentially a non-issue; your neighbors are far more likely to be bothered by the look of the panels than by any reflected light.

Battery Storage Adds Its Own Risk Profile

Many solar installations now include lithium-ion battery storage, and the battery introduces hazards the panels themselves do not have. Lithium-ion batteries contain flammable electrolytes that create unique dangers if a cell is compromised and enters thermal runaway, an uncontrolled exothermic reaction. The trigger is often a short circuit caused by overcharging, overheating, or mechanical damage, and the process generates large amounts of flammable and potentially toxic gas.¹⁸ Home battery fires are rare but have occurred, and fire departments are still developing best practices for suppressing them. If you are installing battery storage, placing the unit in a well-ventilated location away from living spaces and following the manufacturer’s temperature and charging guidelines reduces the already-low probability of a thermal event.

Wind and Structural Risks

A less obvious concern is what happens to solar panels in extreme wind. Building-integrated solar modules, particularly those mounted on high-rise facades with thin-walled steel brackets, can be susceptible to overturning or detachment during severe wind events. Such failures pose risks to public safety from falling debris.¹⁹ For standard rooftop residential systems, proper engineering and code-compliant mounting dramatically reduce this risk, but installations in hurricane-prone or high-wind regions warrant attention to mounting hardware rated for the local wind conditions.

The Other Side of the Ledger

An honest assessment of whether solar panels are dangerous to your health has to account for what they replace. Fossil fuel power plants emit sulfur dioxide, nitrogen oxides, and fine particulate matter that cause respiratory disease and premature death on a scale that dwarfs the risks from solar technology. A study of Chile’s rapid solar adoption found that solar energy displaced coal generation and reduced hospital admissions for respiratory diseases in communities near and downwind of the coal plants that were taken offline.²⁰

In the United States, wind and solar generation combined led to an estimated 1,200 to 1,600 fewer premature deaths in 2022 alone from reduced air pollution.²¹ The benefits are not evenly distributed geographically. A solar panel installed in New Jersey displaces significantly more sulfur dioxide, nitrogen oxides, and particulate matter than one in Arizona, resulting in roughly 15 times more health and environmental benefits, because the grid it feeds into is dirtier.²² Even accounting for the sulfur emissions generated during panel manufacturing and transportation, the operational phase of solar energy delivers overwhelming net emission reductions.²³

Urban Heat Effects from Large-Scale Deployment

One counterintuitive finding that has emerged from recent modeling research is that large-scale rooftop solar can slightly warm the surrounding urban environment during the day. Solar panels are darker than many roofing materials, especially light-colored or reflective roofs, which means they absorb more sunlight. A study modeling solar deployment across Sydney found that widespread rooftop panels could raise peak summer air temperatures by up to 1.5°C during the daytime, though temperatures dropped by 2.7°C at night as the panels also changed how buildings released stored heat.²⁴ This effect is more relevant at the city-planning scale than for an individual homeowner, and it applies mainly to low-efficiency panels on roofs that were previously highly reflective. On a dark asphalt roof, adding solar panels changes the thermal picture very little. For cities thinking about both solar mandates and heat-island mitigation, the panel efficiency and the existing roof color both matter.