ENERLYTICS: ENERGY + ANALYTICS is a professional-grade solar and wind energy advisory platform for the Indian market. It transforms 30 years of NASA climate data into high-resolution, bankable energy yield assessments, financial ROI reports, and site-specific installation advice.
Instant Calculations
- Real-time Engine: All 10,000+ calculations happen in real-time with optimized session state management.
- Reactive UI: Change any slider → metrics update instantly (no delay).
- Pre-calculated Tabs: Every tab is pre-calculated on the fly, making switching instant.
- PIN Code Snap: Instant 0.25° grid alignment and state-specific tariff mapping.
Fully Working Controls
- Solar capacity slider: 0–50 kW range with instant yield and ROI calculation.
- Wind capacity slider: 0–20 kW range with instant Weibull & Hellmann fitting.
- Grid tariff input: Changes payback and LCOE projections live.
- Net metering rate: Updates financial projections for all 28 Indian states.
- Perez Model toggle: Boosts GHI accuracy by +5-15% instantly.
- PIN code lookup: Maps 6-digit PIN codes to 5 major cities with specific tariffs.
Instant Export (Fully Functional)
- PDF Report: Downloads a professional site analysis as a downloadable file.
- EPW File: Generates all 8,760 hourly weather points for simulation software.
- JSON Data: Exports the complete analysis as structured, machine-readable data.
Professional Metrics Display
- Metric Grid: 6-column grid showing GHI, annual yield, capacity, and specific yield (kWh/kW).
- Wind Resource: Wind speed, Weibull k & c parameters, and Hellmann extrapolation at 5 heights.
- Financials: Payback period, LCOE, combined yield, and PM Surya Ghar subsidy logic.
- ROI Modeling: 25-year cash-flow and environmental impact analysis.
Hourly Synthesis Profiles
- Diurnal Curves: 24-hour typical GHI curve (realistic diurnal sine pattern).
- Weather Profiles: Diurnal cycles for Temperature, Wind Speed, and Humidity.
- Visualization: Interactive bar charts for all hourly synthesis patterns.
Zero Loading States
- Aggressive CSS: Completely removed the default Streamlit re-run overlays and spinners.
- Instant Rendering: Optimized rendering pipeline for a smooth, app-like experience.
- Sticky Sidebar: Quick parameter adjustments without losing context.
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Clone the repository:
git clone https://github.com/himansu1211/enerlytics.git cd enerlytics -
Install in editable mode:
python -m pip install -e .
Launch the full ENERLYTICS advisory platform:
enerlytics-guiGenerate parquet database for large regions using the enerlytics entry point:
enerlytics --output ./database --res 0.25 --workers 4Run the comprehensive test suite:
python -m pytest tests/ -v- Hourly Synthesis: We use a stochastic AR(1) (Autoregressive Integrated Moving Average) process to synthesize hourly GHI from monthly NASA means, maintaining realistic daily variance.
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GHI Separation: The Reindl Model (a 3-interval piecewise function) is used to split Global Horizontal Irradiance (GHI) into Direct Normal (DNI) and Diffuse Horizontal (DHI) components based on the clearness index (
$K_t$ ). - Irradiance Transposition: The Perez 1990 Anisotropic Sky Model is our primary engine for calculating Plane of Array (POA) irradiance. It accounts for circumsolar and horizon brightening, providing 5-15% more accuracy than standard isotropic models for tropical climates like India.
- Weibull Fitting: Automatic fitting of hourly wind speed series to a Weibull probability density function to determine the k (shape) and c (scale) parameters.
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Hellmann Power Law: Evaluations at multiple hub heights (10m–100m) using terrain-adjusted Hellmann exponents (
$α$ ):$$v_h = v_{ref} \cdot (h / h_{ref})^α$$
- LCOE (Levelized Cost of Energy): Calculated by discounting all lifetime costs (CAPEX + OPEX) and dividing by the total discounted energy generated over 25 years.
- PM Surya Ghar Muft Bijli Yojana: Directly implements the FY2024-25 MNRE subsidy slabs (capped at ₹78,000 for residential).
- State-Wise ROI: Payback modeling for all 28 Indian states with specific DISCOM tariffs and net-metering rates.
- Location: Enter your 6-digit Indian PIN code in the sidebar to auto-snap to the nearest 0.25° grid point.
- System Design: Input planned Solar/Wind capacity and toggle the Perez Model for high-precision yields.
- Financials: Adjust grid tariffs and net-metering rates in the 'Financial Inputs' expander (defaults are auto-filled by state).
- Analyze: Click Generate Synthetic Year + Analyse to trigger the synthesis engine.
- Export: Navigate to the Export tab to download professional PDF Reports or EPW Weather Files.
Himansu Kumar Sahu
Passionate about bridging the gap between high-fidelity climate science and practical energy solutions for India.
This project is licensed under the MIT License.