Photovoltaic Calculations
Design solar power plants
About
This app helps professionals and enthusiasts design, size, and analyze solar plants. It provides precise calculations for various components, optimizing yield and efficiency. Includes theoretical resources and practical tools for immediate use.
What's New in Photovoltaic Calculations
3.4.0
October 19, 2026
* Mod: Calculations reordered based on their usage * Mod: Updated all references to the 2026 NEC * Fix: Some latitude text boxes did not accept negative values * Fix: The "Show favorites at startup" option had no effect * Fix: Air mass index: the angle field is now called "Solar elevation" * Fix: Fill factor: an error message is now shown when the entered values are inconsistent * Fix: Sun position: updated the time zone guide and refined the equation of time coefficients * Fix: Optimal tilt angle: the tilt always stays between 0° and 90°, the sign of the Southern Hemisphere formula has been corrected in the formulas section * Fix: Irradiance on tilted surface: correct results in the Southern Hemisphere * Fix: an error is now shown if the temperature coefficient has the wrong sign * Fix: Compass: the azimuth now refers to true north * Fix: Inclination: the value is correct however the phone is placed on the panel, and a magnetic field sensor is no longer required * Fix: Solar cable ampacity (CEI and IEC): ampacities in buried conduit are now equal to those of a 90 °C cable * Fix: Solar cable ampacity (NEC and CEC): fixed a crash and some ampacity values * Fix: Solar cable size NEC: fixed sizing according to Art. 690.8(B) * Fix: Voltage drop of solar cables calculated with the tinned conductor resistance of IEC 60228 (EN 50618) and, for AWG sizes, with NEC Table 8 * Fix: Corrections to the protective device calculation * Fix: String sizing: added the module maximum power voltage to check the minimum MPPT voltage and corrected the short-circuit current at the cell temperature * Fix: Inverter selection: a single screen valid for all standards (IEC/CEI and NEC/CEC) * Fix: Module inter-row spacing: the support height no longer lengthens the shadow * Fix: Need for SPD: the calculation is split into two tabs, IEC and CEI
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FAQ
What calculations does Photovoltaic Calculations offer?
Photovoltaic Calculations offers a comprehensive suite of calculations including panel yield, sun position, irradiance, temperature effects, cable sizing, protective device requirements, string sizing, inverter selection, and panel decay over years.
What are the theoretical and practical resources available in Photovoltaic Calculations?
The app provides resources on series and parallel panel connections, basic concepts like modules and arrays, and astronomical parameters such as solar zenith and azimuth. It also includes a formulary.
What devices does Photovoltaic Calculations support?
Photovoltaic Calculations is available on iPhone, iPad, and iPod devices, making it accessible for users on Apple's mobile ecosystem.
What is the age rating for Photovoltaic Calculations?
Photovoltaic Calculations has an age rating of 4+, indicating it is suitable for a wide range of users, including younger individuals interested in the topic.
How often is Photovoltaic Calculations updated?
The app was last updated on May 5, 2026, with version 3.2.0. This indicates recent development and ongoing support for the application.
Does Photovoltaic Calculations have ads?
Yes, Photovoltaic Calculations contains advertisements. This is typical for free applications that offer in-app purchases for premium features.
What are the subscription options for Photovoltaic Calculations?
Users can subscribe to the PRO Version for either 3 months at $0.99 or 1 year at $2.99. The 1-year subscription includes a 7-day free trial.
What is the user sentiment for Photovoltaic Calculations based on ratings?
The app has a rating of 3.0 stars from 2 ratings. This suggests a mixed reception from its current user base.
