Solar Voltage Drop

NEC 210.19 Vdrop

$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.

Solar Voltage Drop - professional NEC calculator for electricians. Offline, permit-ready. Solar Voltage Drop Calculator helps solar installers and electricians verify wire sizing for voltage drop compliance per NEC standards. Supports DC solar circuits (NEC 690.31, 2% threshold) and AC branch circuits (NEC 210.19, 3% threshold). Choose from AWG 14 through 4/0, copper or aluminum conductors, and DC, AC single-phase, or AC three-phase circuits. Features: - Voltage drop in volts and percentage - End voltage calculation - Pass/Fail indicator based on NEC thresholds - Automatic wire size recommendation when current selection fails - Save calculations to history - Export professional PDF reports - NEC Chapter 9 Table 8 resistance data Formula: VD = (multiplier x L x I x R) / 1000 - multiplier: 2 for DC/single-phase, 1.732 for three-phase - L = one-way distance (ft) - I = current (A) - R = resistance (ohms/1000ft) from NEC Chapter 9 Table 8 OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: - Unlimited saved calculation history - PDF export of results - Dark theme - Ad-free experience

Ratings & Reviews

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- Fixed cross-app links: tapping another SolarTools app in More Tools now opens its App Store page on iPhone and iPad. - Minor stability improvements.

Version 1.0.1

The developer, Rizvan Adzhoian, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Rizvan Adzhoian
Size
  • 34.5 MB
Category
  • Utilities
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
18+
In-App Purchases
Yes
Copyright
  • © 2026 Rizvan Adzhoian
  • Developer Website
  • Privacy Policy

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