Solar panels are not a known cause of cancer. No credible evidence shows that a properly installed residential solar system causes cancer.
Solar panels generate electricity from sunlight. The panels and connected equipment produce low-frequency, non-ionizing electromagnetic fields. They do not produce ionizing radiation such as X-rays or gamma rays, which can damage DNA directly.
Solar Panels and Cancer Risk at a Glance
| Concern | Evidence-Based Answer |
|---|---|
| Do solar panels cause cancer? | No established evidence shows that solar panels cause cancer. |
| Do panels emit radiation? | They produce non-ionizing electromagnetic fields, not X-ray or gamma radiation. |
| Why is 2002 sometimes mentioned? | The International Agency for Research on Cancer classified extremely low-frequency magnetic fields as "possibly carcinogenic to humans" in 2002. That classification did not establish a cancer risk from solar panels. |
| Is the inverter a concern? | Inverters produce low-frequency electromagnetic fields that decrease quickly with distance. |
| Do solar panels contain toxic materials? | Some panels contain small amounts of cadmium or lead, but working panels are sealed and do not normally leach these materials. |
| Should homeowners remove solar panels? | No. Cancer concerns are not a reason to remove a properly installed solar system. |
What Type of Radiation Do Solar Panels Produce?
Solar panels do not produce ionizing radiation. A photovoltaic panel converts sunlight into direct-current electricity. An inverter then converts that electricity into alternating current for household use or the electrical grid.
The inverter, wiring and other electrical equipment can produce electric and magnetic fields, commonly called EMFs. Similar fields come from household wiring, appliances and power lines.
Non-ionizing EMFs do not have enough energy to damage DNA directly. The National Cancer Institute says that no consistent evidence has established a relationship between non-ionizing EMF sources and cancer.
Can Electromagnetic Fields From Solar Panels Cause Cancer?
No confirmed evidence shows that EMFs from rooftop or utility-scale solar panels cause cancer.
In a solar PV system, the inverter, cables and transformers are usually the main sources of electromagnetic fields. Field strength decreases quickly as distance from the equipment increases.
The IARC classification mentioned above was based on limited and inconsistent evidence concerning childhood leukemia. It applies broadly to extremely low-frequency magnetic fields, including those associated with power systems. It does not establish a cause-and-effect relationship for household solar installations.
The World Health Organization says that no adverse health effects from low-level, long-term exposure to power-frequency fields have been confirmed. It also says that no large increases in cancer risk have been found in children or adults.
Do Toxic Chemicals in Solar Panels Cause Cancer?
Some solar panels, particularly certain thin-film models, contain cadmium telluride. Other panels may contain small amounts of lead or other metals in components such as solder.
These materials are sealed inside the panel. The U.S. Environmental Protection Agency says that working solar panels do not leach toxic metals during normal use and that cadmium telluride cells are sealed between layers of glass.
The safety concern is damaged or discarded equipment, not ordinary operation. Do not dismantle a broken panel or put it in regular waste without checking local disposal rules. Contact the installer, a qualified solar recycler or a local environmental agency when panels are damaged or reach the end of their usable life.
Does Reflected Sunlight From Solar Panels Cause Skin Cancer?
Solar panels do not create additional ultraviolet radiation. Excess ultraviolet exposure from sunlight can cause skin cancer, but solar panels do not make sunlight more carcinogenic.
Glare can affect nearby homes, roads or aircraft. Glare is not the same as cancer-causing radiation.
What Should Homeowners Do?
For a properly installed solar system:
- There is no medical reason to remove the panels because of cancer concerns.
- If possible, avoid placing an inverter directly beside a bed or seating area. This is a precaution, not a proven cancer-prevention measure.
- Have damaged panels, wiring or inverters inspected by a qualified professional.
- Use proper recycling or disposal channels for old panels.
- Pay attention to established solar safety issues, including electrical faults, roof installation quality and safe handling after storm or fire damage.
Bottom line: Cancer concerns do not justify removing a properly installed solar system. Damaged and end-of-life panels should be inspected and disposed of through the right channels.