Short answer: renewable energy earthing and lightning protection should match site soil, structure material, DC voltage, SPD rating, ground rod material, bonding conductor and corrosion environment.
| Grounding rods | Select copper bonded, solid copper, galvanized or stainless rods according to soil and corrosion risk. |
|---|---|
| Bonding conductors | Confirm copper, tinned copper, copper bonded steel wire or strip size by design current. |
| Surge protection | Use AC SPD, DC SPD or signal SPD according to inverter, combiner box and communication line design. |
| Connections | Use clamps, exothermic welding, earth bars and inspection pits according to site maintenance rules. |
Renewable projects should not reuse building grounding lists without checking DC protection, site corrosion and array layout.
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