Solar Panel Sizer
NEC 690 PV System Sizer
$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.
Solar Panel Sizer - professional NEC calculator for electricians. Offline, permit-ready.
Solar Panel Sizer helps solar energy professionals calculate the number of panels needed for any PV system. Built for installers, designers, and engineers working with residential and commercial solar projects.
WHAT IT CALCULATES
- Number of solar panels required
- Total system size (kW)
- Annual and monthly energy production (kWh)
- Roof area needed (sq ft)
- Roof area sufficiency check
NEC COMPLIANT
All calculations follow NEC Article 690.7 and 690.8 standards. Built-in Peak Sun Hours data for all 50 US states sourced from NREL PVWatts.
PANEL OPTIONS
Choose from 7 standard panel types: 250W to 600W monocrystalline and bifacial panels. Supports Grid-Tied, Off-Grid, and Hybrid system configurations with accurate loss calculations.
FEATURES
- Works 100% offline
- Save calculations to history
- Export professional PDF reports
- English and Spanish (en/es)
- Light and dark themes (in-app purchase)
- Material Design 3 interface
PRO VERSION ($2.99)
Remove ads, get unlimited calculations, and unlock dark theme.
PART OF SOLARTOOLS SUITE
Solar Panel Sizer is part of the SolarTools collection of professional calculators for solar energy specialists.
Contact: support@tradetools.dev
Privacy: https://tradetools.dev/solar/privacy-policy.html
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
- This app hasn’t received enough ratings or reviews to display an overview.
- Fixed cross-app links: tapping another SolarTools app in More Tools now opens its App Store page on iPhone and iPad.
- Minor stability improvements.
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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Rizvan Adzhoian
- Size
- 34.8 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.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Advertising
- In-App Purchases
Yes
- Pro Unlock $2.99
- Copyright
- © 2026 Rizvan Adzhoian