A simple, browser-based tool to compare on-grid vs off-grid solar systems, estimate net-metering credits, and compute payback period—designed to be easily understood by anyone.
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https://Shrv03.github.io/Solar-Cost-Analysis-Tool/
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- 🔋 On-Grid vs Off-Grid side-by-side cost & savings comparison
- 💳 Net-Metering Credits estimation (exported energy → bill credit)
- 📉 Payback Period & simple ROI
- 📊 Beginner-friendly UI (single HTML file, no install)
- 🌓 Built-in dark mode ready styles (optional)
- Clone or download the repo
git clone https://github.com/Shrv03/Solar-Cost-Analysis-Tool.git cd Solar-Cost-Analysis-Tool
2. **Open** `index.html` in any modern browser.
3. Enter:
* System cost, incentives/rebates
* Local tariff ($/kWh)
* Annual generation (kWh) and self-consumption %
* Export rate or net-metering rules
4. View results: **Annual savings, credits, net cashflow, payback years**.
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## 🧮 Behind the Numbers (Formulas)
Let
* `CapEx` = upfront cost − incentives
* `Gen` = annual generation (kWh)
* `Self%` = % of Gen consumed on-site
* `Tariff` = grid electricity price ($/kWh)
* `ExportRate` = credit for exported energy ($/kWh)
* `FixedOM` = annual O&M ($)
Then
* `SelfUse = Gen × Self%`
* `Export = Gen − SelfUse`
* **Savings = SelfUse × Tariff**
* **Credits (net-metering) = Export × ExportRate**
* **Annual Net = Savings + Credits − FixedOM**
* **Simple Payback (yrs) = CapEx / Annual Net**
> You can adapt `ExportRate` to model full-retail net metering (set equal to `Tariff`) or reduced credit programs.
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## 📂 Project Structure
```
Solar-Cost-Analysis-Tool/
├─ index.html # Main web app (calculator UI + logic)
└─ README.md # This file
```
---
## 🖼️ Screenshots
> Replace the placeholder below with a real screenshot after your first run.
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## 🚀 Roadmap
* [ ] Interactive charts (cashflow, cumulative savings, payback)
* [ ] Region presets (typical irradiance & tariffs)
* [ ] Battery sizing helper (for off-grid/hybrid)
* [ ] Export results to CSV/PDF
* [ ] “What-if” sliders for sensitivity analysis
---
## 🤝 Contributing
1. **Fork** this repo
2. Create a feature branch: `git checkout -b feature/amazing-idea`
3. **Commit** changes: `git commit -m "Add amazing idea"`
4. **Push**: `git push origin feature/amazing-idea`
5. Open a **Pull Request** 🎉
---
## 📜 License
This project is released under the **MIT License**. See `LICENSE` for details.
---
## 💬 Acknowledgments
* Inspired by community efforts to simplify **solar economics** for homeowners and students.
* Icons/emoji via GitHub markdown.
---
## ❤️ Support
If this helps you, please **star ⭐ the repo** and share it with others interested in solar!
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If you’d like, I can also provide a clean, ready-to-use `index.html` with inputs + live calculations and a minimal dark theme.
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