Cesun
Design Solar. See Savings.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Enter your roof details and get an instant, tailored solar system design — with projected energy output, savings, and access to certified installers near you.
Say goodbye to complicated solar calculations and endless back-and-forth with contractors. Cesun makes designing a rooftop solar system as easy as ordering takeout.
WHAT IT DOES Just enter your roof orientation, size, location, and current electricity bill — Cesun instantly generates a complete solar installation plan, including:
Component Breakdown — Detailed panel models, quantities, and matching inverter recommendations
Energy Production Forecast — Accurate annual output estimates based on local sunlight data and roof conditions
Savings & ROI — Clear projections of electricity bill savings, payback period, and long-term returns
Certified Dealer Matching — Automatically connects you with verified, certified installers near your location
WHO IT'S FOR Whether you're a homeowner exploring rooftop solar or a sales consultant who needs to produce a proposal fast, Cesun turns a process that used to take days into a task that takes minutes.
WHY CESUN
Data-Driven: Combines location, sunlight exposure, and energy usage for realistic, tailored plans
Easy to Understand: Complex technical specs translated into clear charts and numbers
Local Support: Direct connection to certified dealers — from design to installation, all in one place
Download Cesun and let the sun take some weight off your electricity bi
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The developer, Shenzhen Yunying Tianguang Technology Co., Ltd., 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Shenzhen Yunying Tianguang Technology Co., Ltd.
- Size
- 40.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Shenzhen Yunying Tianguang Technology Co., Ltd.