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Fileraz
Tools
Fileraz
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Solar & Electricity Calculator
Planning estimates, reviewed October 2026 — flat-rate math on your figures, not DISCOM slabs or a site survey. Confirm tariffs and sizing with your bill and vendor.
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Suggested capacity is daily energy use ÷ peak sun hours: 15 kWh a day at 5 sun hours needs about 3 kW of panels — roughly six 550 W panels. That is the array size that generates your daily consumption on an average day, and the page shows the panel count so roof space enters the picture immediately.
Derive daily use from the bill (monthly units ÷ 30) rather than guessing loads, and use a local peak-sun figure — many Indian locations average 4–6, but rooftops with shade or a poor tilt deliver less. Treat the kW as the starting point for a vendor quote, then let the site survey adjust for orientation, shadow, panel efficiency, and inverter losses.
It does not read maps or shade, size batteries or inverters, price the system, or model seasons — generation math only, with the survey as the mandatory next step.
Scale gauge only — a site survey decides the design.
Many parts of India average around 4–6 peak sun hours; use a local figure if you have one for a better estimate.
No. Battery sizing depends on backup needs — use the battery backup tool for that.
About six 550 W panels (or eight 375 W ones) — plus access gaps, which is why roof area matters as much as the kW figure.
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