Off-grid component requirements
Earthing & Lightning Arrester
Safety path for fault current and surges.
Earthing and lightning protection help protect people, electronics and solar equipment from fault current, leakage and surge events caused by lightning or switching transients.
Role in the System
Provides a safe path for fault current.
Supports SPD operation.
Reduces equipment risk from lightning and surge events.
Sizing Checks
Equipment earthing requirement.
Soil/installation condition.
Separate earthing for equipment, LA and system design where required.
Earth conductor size.
Lightning exposure and roof height.
Required Documents
Earthing layout.
Earth pit details.
Lightning arrester specification.
Earth resistance test record if available.
Photos of earthing and LA installation.
Safety Checks
Continuity between equipment and earth path.
Proper bonding of structure and DBs.
Correct down conductor routing.
No sharp bends in lightning down conductor.
SPD connected to effective earth.
Handover Records
Earthing location details.
LA installation photos.
Earth test reading where performed.
Inspection and maintenance schedule.
Maintenance Notes
Inspect earth connections for corrosion.
Check LA and SPD condition after storms.
Keep earth pit accessible for testing.