Electrical Safety (Intro)
PV systems can produce dangerous DC voltage and current whenever modules are illuminated. Even small strings can exceed typical household voltage.
Two key hazards
- Shock: current through the body (depends on voltage, resistance, and path).
- Arc flash / arc blast: a high-energy electrical arc that produces extreme heat, pressure, and light.
Core safe-work habits
- Treat PV conductors as energized until verified otherwise.
- Use correct tools and meter settings.
- Keep covers on live parts, manage exposed conductors, and follow procedures.
- If you are unsure, stop and ask — electricity is unforgiving.