Wattscore Smart Energy Tools

Solar GST Invoice Calculator

How much can you save by installing solar? Estimate solar subsidy, electricity savings and project payback.

Solar EPC GST reverse invoice calculator

Calculate the qualifying 70% goods / 30% services deemed value split. Draft calculation only - not an issued tax invoice.

Seller / issuing business details

All seller and buyer fields are optional. Enter only the details you need; unfilled fields are left blank in the draft PDF.

Seller legal / business name (optional)

Seller GSTIN (optional)

Seller address (optional)

Seller state and code (optional)

Seller phone (optional)

Seller email (optional)

Invoice particulars

Total entered amount (₹)

Amount basis

GST mode

Document date

Customer / bill to (optional)

Reference / draft number (optional)

Plant capacity (kW; optional)

Recipient state

Customer address

Customer GSTIN (if registered)

Optional payment and invoice details

Bank name / branch

Account number

IFSC

Account holder name

Authorized signatory / designation

Terms and conditions

This tool is a draft valuation aid only. The item names and codes reproduce the uploaded Wattscore sample exactly: Supply of SOLAR PV System (HSN 8541) and Installation & Commissioning of Solar PV System (SAC 9987). Confirm applicable HSN/SAC, contract eligibility, place of supply and notification rates before issuing a legal tax invoice. Public visitors cannot issue invoices in Wattscore's name.

Want to understand more about solar energy? Explore Wattscore Insights

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Learn about solar energy, government policies, technical standards and renewable energy developments through Wattscore Insights.

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