Table
Solar PV DC Voltage Drop Distance Table
Solar PV DC Voltage Drop Distance Table reference with assumptions and boundary notes.
Reference boundary
PV DC voltage-drop arithmetic only. It does not choose PV wire, protection, disconnects, temperature treatment, or installation method.
Reference table
Estimate one-way copper PV DC run length for selected array voltage, current, and conductor size examples.
| Array voltage (V DC) | Current (A) | Copper size | 2% one-way length (m) | 3% one-way length (m) | Boundary |
|---|---|---|---|---|---|
| 150 | 10 | 10 AWG | 45.8 | 68.6 | Voltage-drop distance example only; PV conductor and protection checks are separate |
| 300 | 10 | 10 AWG | 91.5 | 137.3 | Voltage-drop distance example only; PV conductor and protection checks are separate |
| 600 | 15 | 8 AWG | 194.2 | 291.3 | Voltage-drop distance example only; PV conductor and protection checks are separate |
| 600 | 20 | 6 AWG | 231.4 | 347.1 | Voltage-drop distance example only; PV conductor and protection checks are separate |
| 1000 | 20 | 4 AWG | 614.8 | 922.2 | Voltage-drop distance example only; PV conductor and protection checks are separate |
| 1500 | 30 | 2 AWG | 974.4 | 1461.6 | Voltage-drop distance example only; PV conductor and protection checks are separate |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.