GST on Solar Equipment: What Installers and Buyers Should Know

Regulator: GST Council / Central Board of Indirect Taxes and Customs (CBIC)

GST treatment of solar installations is a common point of confusion for both installers and buyers, because the rate depends on how a project is structured and billed, not just what equipment is used.

Solar panels, modules, and inverters classified as “solar power generating systems” have historically attracted a concessional GST rate, considerably lower than the standard rate applied to most electronics and machinery, reflecting the government’s intent to keep renewable energy adoption costs down.

EPC (turnkey) contracts that bundle equipment supply with installation, civil work, and commissioning are often treated differently under an abated-value mechanism, where a notified portion of the contract value is deemed “goods” (taxed at the concessional solar rate) and the remainder deemed “services” (taxed at the standard services rate) — effectively producing a blended rate on the total contract.

Practical takeaway: Homeowners and businesses evaluating solar quotes should ask installers to clearly break down whether GST is being applied on a pure-supply basis or a works-contract basis, since this affects the final invoice amount. Installers should stay current with CBIC circulars and state AAR (Authority for Advance Rulings) decisions, as classification disputes in this area have been litigated in several states.