Voltage remains in a PV system even after it has been isolated from the grid by the main disconnect switch. This means the potential for shock still exists. Keep yourself and all equipment at least 3 feet away from all PV system components at all times. If possible, mark off the exclusion zone(s) with fire line tape or caution tape as a reminder.

While fire generally causes the most extensive damage, arcing and power surges cause the most frequent problems in PV system incidents. Lightning, for example, can produce a large power surge that significantly impacts a PV system.

Remember, your PPE will not insulate you against electrical shock. You can be shocked directly, or by contacting energized equipment with your tools or ladders. This is why it is crucial not only to keep your distance, but to keep tools and equipment away as well.