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
📅 Date
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vs
Analysis shows 1 day at a time● LIVE
☀ Solar Analysis

Solar potential at —

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01
Solar Verdict
Solar VerdictOverall assessment of solar potential for this location and date. Based on GHI, cloud cover, and irradiance quality.
02
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 angle
Panel TiltAngle of panel from horizontal. 0°=flat, 90°=vertical. For India, optimal is usually 15°–25° for year-round, steeper in winter. Green marker = calculated optimal for today.
20°
0° flat45°90° vertical
Panel azimuth direction
Panel AzimuthDirection your panel faces. 0°=South (best for India), −90°=East (morning sun), +90°=West (afternoon sun). Green marker = calculated optimal for today.
0° S
NorthWestSouthEastNorth
—% of optimal
03
Key Metrics
Key MetricsLive values for the selected date. GTI, Effective Tilt and Yield update instantly as you drag the angle sliders.
04
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)
05
Sun diagram & compass
Side view — sun rays
NOAA sun position · updates with angle + date
Time of day 12:00
Top view — compass & sun path
Arrow = panel · arc = sun path · green = optimal
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ROI estimator
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All parameters
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Conditions
09
Share / bookmark
01
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
01
Installation comparison ● LIVE
All installation types vs your current angle
Updates instantly with tilt/azimuth sliders
02
Heatmap — hourly irradiance W/m²
7-day irradiance heatmap
Each cell = 1 hour. Drag date slider to re-centre.
01
Monthly GHI profile (prior year avg)
02
Seasonal scores
03
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