Free Tools
Solar Draft Tools
Free calculators for solar EPCs and homeowners across India — size a system, check your subsidy, and see your payback, in seconds.
System Sizing
Solar Size Calculator
Bill in, system size out — panels, kW and roof area estimated instantly.
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Finance
ROI & Payback Calculator
Cost, subsidy and savings in — payback period and 25-year return out.
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Subsidy
PM Surya Ghar Subsidy Calculator
System size in — exact PM Surya Ghar subsidy slab and net cost out.
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Finance
Loan EMI Calculator
Loan amount, rate and tenure in — monthly EMI out.
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Environment
CO2 Offset Calculator
System size in — CO2 offset and trees-equivalent out.
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Ready for an exact quote?
These tools give estimates. Solar Draft's 3D design gives you the real numbers.