SolarCheck
Solar Angle Optimizer · Open-Meteo · NOAA
📍 Location name
🗺 Latitude & Longitude
📅 Date range to explore
Pre-loads data for the date slider — analysis shows 1 day at a time
From
Days
🔀 Comparison day
⚡ Panel Tilt
Tilt angle20°
0° flat45°90° vertical
🧭 Panel Azimuth
Direction (0°=South)0° S
NorthSouthNorth
₹ ROI Estimator
System size (kWp)
Electricity rate (₹/unit)
ⓘ Data accuracy & disclaimer ▾
Analysis uses hourly solar radiation data from Open-Meteo (free tier, ERA5/CAMS). Sun position calculated using the NOAA Solar Position Algorithm — pure mathematics, no external service. Terrain elevation from Open-Elevation SRTM 90m with Open-Meteo fallback.

GTI (Global Tilted Irradiance) is recalculated client-side using beam/diffuse decomposition and your panel angle — not interpolated. Results are intended for initial feasibility planning only and should not replace on-site pyranometer measurement.

Purple Soil Technology Ventures and OneRoof Technologies LLP accept no liability for investment or planning decisions made solely on the basis of this tool's output.
Product by OneRoof Technologies LLP
© 2025 Purple Soil Technology Ventures · SolarCheck v1.0
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Verifying location
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Detecting terrain & elevation
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Fetching solar radiation data
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Fetching comparison period
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Fetching monthly history
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Finding optimal angles
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Rendering report
Product by OneRoof Technologies LLP
📅 Click any date chip to analyse that day · Analysis always shows 1 day at a time · Angle sliders update all values live · Scroll grid to see more dates
📅 Select date — — Analysis shows 1 day at a time ● LIVE
☀ Solar Analysis

Solar potential at —

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Solar Verdict
Solar VerdictOverall assessment of solar potential for this location and date. Based on GHI, cloud cover, and irradiance quality.
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Panel angle optimizer
Panel Angle Optimizer ● LIVE
Angle OptimizerDrag tilt and azimuth sliders to see how your panel angle affects GTI and yield in real time. The green marker shows the calculated optimal angle for today.
Loading optimal angles…
Panel tilt angle20°
0° flat45°90° vertical
Panel azimuth direction0° S
NorthWestSouthEastNorth
—% of optimal
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Key Metrics
Key MetricsLive values for the selected date. GTI, Effective Tilt and Yield update instantly as you drag the angle sliders.
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24-hour irradiance curve
GHI vs GTI — hourly (W/m²)
GHI = measured · GTI = calculated at your angle · updates live with sliders
GHI (horizontal)
GTI (your angle, live)
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Solar diagrams — interactive
Sun position uses NOAA algorithm for your location + date
3D panel view — isometric
Panel on ground · real sun position · rays from actual direction · capture zone shows cosine loss
Run analysis to see the 3D panel diagram Real sun position · rays from correct direction · capture zone
Time of day 12:00
📉 Energy loss waterfall — where your radiation goes
⏱ Generation window — GTI by hour (shifts with azimuth)
>80% of peak
50–80%
20–50%
<20%
Side view — tilt & sun altitude
Shows incidence angle and shadow length
Side view — run analysis first Shows tilt angle, sun altitude, incidence angle
Top view — azimuth & sun path
Arrow = your panel · arc = sun path · green = optimal
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ROI estimator
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Recommendations
RecommendationsActionable insights based on real data for this location, date and your panel configuration. Updates with angle changes.
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All Parameters
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Conditions
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Share / Bookmark
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Hour-by-hour data table
24 hours · selected day
GTI recalculates live with your angle
HourGHI W/m²GTI W/m²DNI W/m²DHI W/m²Cloud %Temp °CUV
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Installation comparison ● LIVE
All installation types vs your current angle
Updates instantly with tilt/azimuth sliders
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Heatmap — hourly irradiance W/m²
7-day irradiance heatmap
Each cell = 1 hour. Drag date slider to re-centre.
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Monthly GHI profile (prior year avg)
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Seasonal scores
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Disclaimer & data sources
ⓘ Data accuracy & disclaimer ▾
Solar data: Open-Meteo free tier (ERA5/CAMS reanalysis). Terrain: Open-Elevation SRTM 90m with Open-Meteo fallback. Sun position: NOAA Solar Position Algorithm (pure math). GTI calculated client-side using beam/diffuse decomposition — real physics, not interpolation. Temp derating: 0.4%/°C above 25°C. Elevation bonus: standard atmosphere model. Tracker gains: industry standard ±28–40%.

Results are for initial feasibility planning only. Purple Soil Technology Ventures and OneRoof Technologies LLP accept no liability for investment or planning decisions made solely on the basis of this tool's output.
📥 Download Report
Save a styled HTML report you can open in any browser and print as PDF
🌞
Solar Report
Complete analysis for — — all metrics, charts, parameters and recommendations in a clean printable format.
HTML · Print-ready
🔗
Share Link
Copy a shareable URL with location, date and panel angles pre-filled. Anyone can open and re-run the analysis.
URL · Reproducible
SolarCheck · — · Data: Open-Meteo · Sun: NOAA · © 2025 Purple Soil Technology Ventures