The objection raised by the GST Department in respect of Input Tax Credit (ITC) claimed on the solar power system installed at the manufacturing premises in FY 2020–21 is likely premised on the restrictive provisions of Section 17(5)(d) of the CGST Act, 2017. This clause disallows ITC on goods or services used for construction of immovable property (other than plant and machinery) on one’s own account. The department may contend that the solar installation constitutes immovable property, thereby attracting the ITC restriction.
However, the statutory explanation to Section 17 clarifies that "plant and machinery" includes equipment and apparatus affixed to the earth by foundation or structural support, used in business operations. Solar generating systems, when used for captive power to support taxable manufacturing activity, fall within this definition. Judicial rulings, including Solex Energy Ltd. v. State of Gujarat, have recognized such installations as eligible plant and machinery, not civil structures. The mere attachment of the system to land or rooftops does not, by itself, render the asset immovable if it retains separability and serves a functional business use.
To defend the ITC claim, the assessee must substantiate that the solar system is capitalized as plant and machinery, not as part of building or civil works. Supporting evidence such as vendor invoices, CA certifications (non-claim of depreciation on tax component), asset registers, and consumption data linking power generation to manufacturing must be furnished. Technical specifications showing modularity and detachability of the system can reinforce the argument.
If a show cause notice is issued, a detailed legal response citing the Explanation to Section 17 and relevant case law should be submitted. In case of an adverse order, the matter may be appealed under Section 107. If reversal is made under protest, interest and penalty may be challenged under Section 73 by demonstrating absence of wilful default or suppression.
Conclusively, if the solar installation is used in the course of business and qualifies as plant and machinery, the ITC should be legally admissible. Proper classification, documentation, and a reasoned legal reply will be key to defending the claim.