What rapid shutdown means
Rapid shutdown is a safety function that drops the voltage in rooftop solar wiring to a safe level quickly when the system is switched off, so firefighters can work on the roof.
Where it matters on a solar job
It is a code item inspectors check, and the method depends on the inverter design. Label the shutdown switch clearly; it is one of the most common punch list items on solar inspections.
What it costs
The solar panel installation cost guide has the typical job at $21,000 and the usual range at $16,500 to $24,000. The guide shows its sources and what moves the price.
Work it out
- Cost guide: Solar panel installation cost
- Tools, templates and guides: Free solar resources