Photovoltaic Calculations

Contains adsIn-app purchases
3.9
287 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Learn more
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About this app

Photovoltaic systems represent the future, this app brings together simple and quick calculations to make the most of solar energy.

Main:
Efficiency of solar panels, Air mass coefficient, Fill factor, Sun position, Optimal tilt angle, Solar radiation on a tilted surface, Solar cell temperature, Effect of temperature on the photovoltaic module, Compass, Tilt, Size of the solar cable (DC), Protection device sizing, String sizing, Short-circuit current of strings, Choice of inverter, Decay of photovoltaic panels over the years, Occupied surface, Hours of daylight during the year.

Resources:
Series solar panels connection, Parallel solar panels connection, Module - string - array, Solar zenith, Solar azimuth, Solar declination.

The app also contains a very useful form.
Updated on
Apr 17, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Financial info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

3.9
280 reviews
Rick Bello
October 14, 2023
I like the app but some of the language should be more consistent with the NEC. Perhaps the developer is IEC based in which case I apologize, but let's call a PV output circuit feeder what it is defined as by the NEC 690 definitions not a sub array cable. I design solar for a living but can't make any use out of the fuse sizing tool. Easier to do with a normal calculator. Rooting for the devs here and like a lot of what this app offers. Just want to see it be even better.
3 people found this review helpful
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Ettore Gallina
October 18, 2023
Hello, thank you very much for your comment and review. Hello, thank you very much for your comment and review. Yes we use IEC, if you want to give us suggestions regarding the NEC standard contact us at our email address.
Nadeem Qurashi
February 10, 2026
Can this app be reinstalled after factory formatting the mobile?
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Ettore Gallina
February 10, 2026
Hi, yes, by remaining logged in with the same account used during the purchase phase, you will have all the features unlocked again.
Dragančo Velkov
September 3, 2024
excellent application, keep working and make better and better
1 person found this review helpful
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Ettore Gallina
September 4, 2024
Hello, thank you immensely for your comment and review.

What’s new

v3.0.3
* Mod: Set the resistivity of copper to 0.01851 Ω*mm²/m and of aluminum to 0.02941 Ω*mm²/m
* Add: Guide on safe operating currents for circuit breakers and fuses
* Add: Support for IEC circuit breakers up to 6300A
* Fix: Automatic selection of temperature behind panels when sizing NEC protection device
* Fix: Crash when starting printing from an invalid fragment
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: General update of the languages