The recent double-whammy threat of hurricane Iselle and Julio reminds us that Mother Nature can be unpredictable and that it’s important to prepare ourselves when in the face of oncoming menacing weather. Haleakala Solar has been in the solar industry in Hawaii for over 37 years, through many tropical storms and hurricanes, and near-misses. For the most part, the weather we experience in Hawaii is mild and pleasant; however, at times we experience tropical storms or even hurricanes which may bring hazardous conditions of heavy rains and destructive winds. In preparation for these storms, along with stocking up on supplies and securing loose items in the yard, it’s important to know some facts and get some tips as a solar PV system owner during severe weather.
Solar photovoltaic panels are attached to the roof securely and are meant to withstand gusty wind conditions of a category 2 hurricane. When winds begin to exceed 105 mph structural damage to homes and businesses may begin to occur. The systems installed by Haleakala Solar are rated to withstand winds of even greater capacity than the norm; however, with flying debris from these types of rip-roaring winds, damage to the panels may occur, such as cracked glass. In 37 years we have NEVER had a panel come loose.
Unless you have an off-grid system (not tied into the utility grid), you may turn off the PV system to prevent a power surge from the grid. We suggest that you isolate your PV system by turning off the PV disconnect and your PV breaker. This will help isolate and protect your PV system in the event of a power surge. Enphase Microinverters have integral surge protection, greater than most traditional inverters; however, if the surge has sufficient energy, the protection built into the microinverter can be exceeded, and the equipment can be damaged. It’s important to call your insurance company to confirm that your solar is indeed covered under your hurricane policy.
Once the high winds and heavy rains have passed, you may turn the PV system back on; however, if you suspect that damage has occurred, it is advisable to contact Haleakala Solar for a complete inspection of the PV system before powering up the system. If you find damage did occur to the PV panels, inverters or wires, DO NOT touch the paneling or wiring since you may get electrocuted.
If you DID NOT turn off the system and your area loses electricity, your PV system will turn itself off automatically. Be aware that the PV modules, even when turned off, can still hold electrical current. Once power has been restored, the PV system will turn itself on automatically. At this point, check your online monitoring system (if applicable) to check the electrical output of the system and make sure it is registering at normal levels.
We hope everyone stays safe during this hurricane season. If you have any other questions not covered by the above, please call us at our state-wide toll free number, 643-8000, or drop us a line by using our contact form, and we’ll be sure to give you the answers you seek.