Frequently asked questions about how your SunPower System works

What if a squirrel, a bird, or any other wildlife chews or in any way interferes with my solar system’s wiring and cables?

After market animal guards and other preventive measures exist that may help deter wildlife from coming into contact with your solar system. Please contact your Installer or a local SunPower dealer in your area for options and pricing.

What should I do in an emergency?

Should there be a fire, explosion, gas leak, system damage, or fuel spill around your system’s components, dial 911 immediately. If the emergency requires you to seek safety immediately, do so first and then alert emergency personnel that you have a solar system so they can shut it down, if necessary. For assistance restarting your system after an emergency, please contact 1-800-SUNPOWER (786-7693).

What are common safety tips?

  • Do not touch or disturb panels or wiring.

  • Do not attempt to work on, alter, repair, disassemble, or remove any part of the system. Doing so could expose you to dangerous electrical currents and void manufacturer warranties. Only trained and certified professionals should service the system.

  • Do not use mirrors or any other option to concentrate sunlight onto your panels. Doing so is dangerous and will void your warranty.

  • Do not step on the panels or allow objects to fall on the panels.

  • Do not allow children or pets near the inverter or the panels on your roof.

Should I clean my solar panels?

Your SunPower system was designed with typical soil accumulation in mind, and seasonal rains are usually enough to adequately clear any soil or dust that might accumulate. We strongly recommend that you do not go onto your roof for panel cleaning or inspection. If severe soiling occurs and you feel it is absolutely necessary to clean the panels, you can clean them by spraying them from the ground with a standard garden hose. We recommend that homeowners only clean panels early in the morning or late evening rather than when the sun is at its peak or when the panels are warm.

Why should I limit shading from trees?

To maximize system production. Trees, plants, rooftop antennas, satellite dishes, and other obstructions can block the sunlight from reaching the panels. If any portion of the panel is shaded, your system will produce electricity at a reduced level. Should you need to trim vegetation or move objects that might shade the panels, please do so during the daylight hours and use caution.

How long will a SunPower solar system last?

From our warehouse through installation on your roof, SunPower products are required to meet comprehensive quality and reliability standards. For both loan and cash systems, we provide a 25-year limited warranty for all items on your roof (panels, micro-inverters and racking) and a 10-year limited warranty for everything not on your roof (monitoring equipment). For leased systems, you can get reimbursed if your system doesn’t perform as outlined in your SunPower agreement.*.

Does my system store energy?

No. Unused energy goes back to your utility provider.

What happens during power outages?

Your system will automatically shut down. Safety requirements prohibit the system from producing electricity during a power outage or blackout because there is a chance that the system could feed electricity into the electric grid while utility workers are accessing the grid. The system will restart automatically when power is restored.

Will it work on cloudy days?

Solar can produce power on cloudy days, depending on the density of the cloud cover.

Does my system work at night?

Sunlight must be present for the system to generate electricity. You can use the mySunPower monitoring app to view system performance by time of day.