Solar Voltage Drop NEC 210

Voltage Drop Calculator for Solar PV (NEC 210.19)

# What it does
Calculates voltage drop percentage for PV DC string runs and AC inverter runs per NEC 210.19 informational note (3% target, 5% maximum).

# Features
- DC string voltage and current
- AC inverter voltage (split-phase, 3-phase)
- Conductor length (one-way)
- Wire size AWG / kcmil
- Wire material (copper / aluminum)
- Voltage drop percentage with PASS / WARN / FAIL
- NEC 210.19 informational note compliance
- Recommended next-larger AWG if over 3%

# Made for
Solar installers, electrical contractors, PV technicians, code inspectors, apprentice electricians.

# Optional Pro Upgrade — $2.99 one-time
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Calculation history (saved & searchable)
- PDF report export with NEC references
- Dark theme
- Ad-free experience