Description

SUNSEER allows users to store information about their installations in the cloud, retrieve historical data and forecasts, and generate clear financial reports.

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Motivation

Potential customers often struggle to obtain reliable data and financial estimates for their photovoltaic installations. This process can be time-consuming and requires knowledge of multiple data sources.
With SUNSEER, we focus on simplicity and effectiveness – we want every user to be able to obtain realistic forecasts in just a few steps and understand the benefits of installing solar panels.

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Features

1. Profitability analysis based on location

   • After selecting or downloading a location, the application calculates how photovoltaic panels will perform in a given place.
   • Thanks to precise algorithms, we take into account orientation, roof tilt angle, and average solar exposure.

2. Advanced estimation algorithms

   • We use an open weather API to retrieve historical data and forecasts.
   • The model accounts for seasonal changes and climate nuances, resulting in more accurate outcomes.

3. Potential savings chart

   • An interactive chart presenting savings over a selected time range (e.g. 1, 5, 10 years).
   • The ability to adjust the time horizon and preview seasonal fluctuations in energy production.

4. Downloading forecasts and historical data

   • Export data to a CSV file for use in further analysis.
   • Simple “Download history” and “Download forecast” buttons in the interface.

5. Google login and authentication

   • Quick start: users can log in with one click using their Google account.
   • Security based on Firebase Authentication.

6. Anonymous mode

   • Users who do not want to log in can use the application anonymously and view estimated data without saving history to the cloud.

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Architecture and Technologies

• Frontend: Flutter (Web)

  • Modern UI design, responsive across different screen resolutions.
  • Easily extendable components and animations.

• Backend: Flutter + Firebase

  • Firebase Firestore – storage of user and installation data
  • Firebase Authentication – Google login and anonymous mode

• Weather data: Open API

  • open-meteo – we use an open weather API to retrieve detailed historical data for a given location with 9 km resolution and global coverage.

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Code structure

/project
├── lib
│ ├── animations # Animations used in the application
│ ├── layout # Main screen layouts
│ ├── models # Model definitions (weather, panels, installations)
│ ├── providers # State management providers
│ ├── repositories # Weather data fetching and parsing logic
│ ├── services # Services: Firebase, weather API, location
│ ├── theme # Theme definitions (colors, fonts)
│ ├── widgets # Reusable UI components
│ └── main.dart # Entry point – application startup
└── README.md # This documentation

Demo

Below are a few screenshots showing the key features of the application:

1. Login screen
2. Main dashboard
   
3. Installation management section
   
4. Energy production chart for a selected period
   
5. Potential savings considering electricity tariff