Table
DC Voltage Drop Percent to Volts
DC Voltage Drop Percent to Volts reference with assumptions and boundary notes.
Reference boundary
Percent-to-volts conversion only. It does not choose battery cable, fuse size, or equipment rating.
Reference table
Convert DC voltage-drop percentages to volts for common battery and DC system voltages.
| Nominal voltage | 1% | 2% | 3% | 5% |
|---|---|---|---|---|
| 12 | 0.12 | 0.24 | 0.36 | 0.6 |
| 24 | 0.24 | 0.48 | 0.72 | 1.2 |
| 48 | 0.48 | 0.96 | 1.44 | 2.4 |
| 120 | 1.2 | 2.4 | 3.6 | 6 |
| 300 | 3 | 6 | 9 | 15 |
| 600 | 6 | 12 | 18 | 30 |
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.