# Photovoltaic Calculations — Design solar power plants

> Solar plant design, sizing, and analysis tool for professionals and enthusiasts. (iPhone/iPad app by Egal Net di Ettore Gallina.)

- Source: https://appshunter.io/ios/app/photovoltaic-calculations/id6447060646 (this page in markdown: same URL + `.md`)
- Developer: [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047)
- Category: Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 28 MB
- Languages: American English, Arabic, Bosnian, Bulgarian, Khmer, Croatian, Czech, Danish, Dutch, Finnish and 29 more
- Released: 2023-05-14
- Data updated: 2026-07-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/photovoltaic-calculations/id6447060646/reviews.md

## What is Photovoltaic Calculations?

THE FUTURE IS SOLAR ENERGY. MAXIMIZE YOUR PLANT'S YIELD.

Photovoltaic Calculations is the ultimate app for industry professionals, installers, and renewable energy enthusiasts. Design, size, and analyze every aspect of your solar plant with precision and speed. Get the most out of your solar panels by optimizing every single component simply and instantly!

MAIN CALCULATIONS AND SIZING:
- Photovoltaic panel yield
- Air mass index and fill factor
- Sun position and optimal tilt angle
- Irradiance on a tilted surface
- Solar cell temperature and temperature effect on the module
- Integrated tools: compass, inclination, altitude
- Solar cable ampacity and cross-section calculation (DC)
- Protective device sizing and SPD (Surge Protection Device) requirements
- String sizing and short-circuit currents
- Ideal inverter selection
- Photovoltaic panel decay over the years
- Occupied surface area and spacing between module rows
- Estimation of daylight hours during the year

THEORETICAL AND PRACTICAL RESOURCES:
- Series and parallel panel connections
- Basic concepts: module, string, and photovoltaic array
- Astronomical parameters: solar zenith, solar azimuth, solar declination

Everything you need is packed into an intuitive interface, which also includes a VERY USEFUL FORMULARY always at your fingertips. 
Do not leave efficiency to chance, start designing your perfect solar plant today!

## Key features

- Photovoltaic panel yield calculation
- Sun position and optimal tilt angle
- Solar cable ampacity and cross-section
- Protective device sizing
- Ideal inverter selection
- Panel decay estimation
- Series and parallel panel connections

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| PRO Version (1 year) | $2.99 | per year |
| PRO Version (3 months) | $0.99 | per 3 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| PRO Version (Lifetime) | $89.99 | one-time |



## Frequently asked questions about Photovoltaic Calculations

### 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.

## Version history (last 5 releases)

### 3.2.1 — 2026-07-07

* Mod: Improved cache
* Mod: Improved some layouts
* Fix: Dropdown with RTL languages
* Fix: Crash when printing "Temperature effect on photovoltaic module"
* Fix: Map crash when entering pole coordinates
* Fix: Main view width with RTL languages
* Fix: Crash when selecting a calculation with an index that is no longer valid

### 3.2.0 — 2026-05-05

* Mod: Native ads instead of interstitials
* Upd: In-depth language review

### 3.1.2 — 2026-03-16

* 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
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: General update of the languages

### 3.1.1 — 2026-01-13

* Upd: Updated some external libraries
* Imp: The standard is automatically selected (when possible)
* Upd: Chatbot model updated to Gemini 2.5
* Upd: General update of the languages

### 3.1.0 — 2025-10-21

* New: Current carrying capacity of solar cable
* New: Need for SPD
* New: The app now supports CEI standards in addition to the international IEC ones
* Add: DC/AC ratio parameter for inverter selection
* Add: Voltage drop also expressed in volts in the calculation results
* Mod: In IEC/CEI calculations, the cable with 90°C insulation is automatically selected
* Fix: gPV fuse tripping current
* Fix: Fixed some input parameter labels
* Upd: General update of the languages

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## More apps by Egal Net di Ettore Gallina

- [Electrical Calculations](https://appshunter.io/ios/app/electrical-calculations/id993232048)
- [Lighting Calculations](https://appshunter.io/ios/app/lighting-calculations/id1021580336)
- [Electrical Cost](https://appshunter.io/ios/app/electrical-cost/id1040802526)
- [Eureka - Formazione elettrica](https://appshunter.io/ios/app/eureka-formazione-elettrica/id1105472155)
- [Computer Science Calculations](https://appshunter.io/ios/app/computer-science-calculations/id1488787780)
- [RaspController](https://appshunter.io/ios/app/raspcontroller/id1584315865)

All apps by Egal Net di Ettore Gallina: https://appshunter.io/developer/993232047

## Related topics

[egal net di ettore gallina](https://appshunter.io/ios/topics/egal-net-di-ettore-gallina) · [fusion solar](https://appshunter.io/ios/topics/fusion-solar) · [solar panel calculator plus](https://appshunter.io/ios/topics/solar-panel-calculator-plus)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-26.*