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<!--CIMG V1.1 (21-04-2026)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-11-30/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Changes_In_Management/2025-11-30/in-capmkt/in-capmkt-ent" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2025-11-30/in-capmkt-types" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xl="http://www.w3.org/1999/xlink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2025-11-30.xsd"/><xbrli:context id="MainD"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-11-03</xbrli:startDate><xbrli:endDate>2026-11-03</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-03</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="I_ChangeInManagement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-03</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain1</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ChangeInManagement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-11-03</xbrli:startDate><xbrli:endDate>2026-11-03</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain1</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_ChangeInManagement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-03</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain2</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ChangeInManagement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532725</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-11-03</xbrli:startDate><xbrli:endDate>2026-11-03</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain2</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><in-capmkt:NSESymbol contextRef="MainI">SOLARINDS</in-capmkt:NSESymbol><in-capmkt:NameOfTheCompany contextRef="MainI">SOLAR INDUSTRIES INDIA LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:ScripCode contextRef="MainI">532725</in-capmkt:ScripCode><in-capmkt:MSEISymbol contextRef="MainI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="MainI">INE343H01029</in-capmkt:ISIN><in-capmkt:WhetherDisclosureFiledForListedEntity contextRef="MainD">true</in-capmkt:WhetherDisclosureFiledForListedEntity><in-capmkt:RelationshipWithTheListedEntity contextRef="MainD">Listed Entity (self)</in-capmkt:RelationshipWithTheListedEntity><in-capmkt:WhetherEventOrInformationIsAnOutcomeOfBoardMeeting contextRef="MainD">true</in-capmkt:WhetherEventOrInformationIsAnOutcomeOfBoardMeeting><in-capmkt:DateOfBoardMeeting contextRef="MainD">2026-11-03</in-capmkt:DateOfBoardMeeting><in-capmkt:StartTimeOfBoardMeeting contextRef="MainD">12:45:00</in-capmkt:StartTimeOfBoardMeeting><in-capmkt:EndTimeOfBoardMeeting contextRef="MainD">13:30:00</in-capmkt:EndTimeOfBoardMeeting><in-capmkt:NumberOfPersonsOrEntitiesForWhomChangeIsBeingReported contextRef="MainI" unitRef="pure" decimals="0">2</in-capmkt:NumberOfPersonsOrEntitiesForWhomChangeIsBeingReported><in-capmkt:RemarksForWebsiteDissemination contextRef="MainI">Based on the Audit Committee’s recommendation, the Board of Directors, at its meeting held on November 03, 2026, has approved the appointment of M/s Price Waterhouse Chartered Accountants LLP, Chartered Accountants (ICAI Firm Registration No. 012754N/N500016), in place of the retiring Statutory Auditor, M/s SRBC &amp; Co. LLP, Chartered Accountants (ICAI Firm Registration No:. 324982E/E300003) and the re-appointment of M/s Gandhi Rathi &amp; Co., Chartered Accountants (Firm Registration No. 103031W), as joint Statutory Auditors of the Company for a five-year term, from the conclusion of the 32nd Annual General Meeting (AGM), to be held in 2027, until the conclusion of the 37th AGM, to be held in 2032 subject to Shareholders’ approval.</in-capmkt:RemarksForWebsiteDissemination><in-capmkt:DateOfReport contextRef="MainI">2026-11-03</in-capmkt:DateOfReport><in-capmkt:TypeOfChange contextRef="D_ChangeInManagement1">Appointment</in-capmkt:TypeOfChange><in-capmkt:CategoryForChange contextRef="D_ChangeInManagement1">Auditors</in-capmkt:CategoryForChange><in-capmkt:DesignationOfDesignatedPerson contextRef="D_ChangeInManagement1">Statutory Auditor</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:SalutationOfDesignatedPerson contextRef="D_ChangeInManagement1">M/s.</in-capmkt:SalutationOfDesignatedPerson><in-capmkt:NameOfDesignatedPerson contextRef="I_ChangeInManagement1">Price Waterhouse Chartered Accountants LLP</in-capmkt:NameOfDesignatedPerson><in-capmkt:EffectiveDateOfReasonOfChange contextRef="I_ChangeInManagement1">2027-04-01</in-capmkt:EffectiveDateOfReasonOfChange><in-capmkt:TermOfAppointmentInMonths contextRef="D_ChangeInManagement1" unitRef="pure" decimals="INF">60</in-capmkt:TermOfAppointmentInMonths><in-capmkt:BriefProfile contextRef="D_ChangeInManagement1">Price Waterhouse Chartered Accountants LLP, (the “Firm”) having a Firm Registration No. 012754N/ N500016, is a firm of Chartered Accountants registered with the Institute of Chartered Accountants of India. The Firm was established in the year 1991 and was converted into a limited liability partnership in the year 2014. The registered office of the Firm is at Sucheta Bhawan, 11A Vishnu Digambar Marg, New Delhi - 110 002 and has seventeen (17) branch offices in various cities in India. The Firm is primarily engaged in providing auditing and other assurance services to its clients and is a member firm of Price Waterhouse &amp; Affiliates, a network of firms registered with the Institute of Chartered Accountants of India having Network Registration No. NRN/E/14. Price Waterhouse &amp; Affiliates is a network of separate, distinct and independent Indian Chartered Accountant firms, each of which is registered with the Institute of Chartered Accountants of India. The Firm has more than 120 Assurance Partners as of April 1, 2026. It has a valid peer review certificate and audits various companies listed on stock exchanges in India</in-capmkt:BriefProfile><in-capmkt:WhetherTheStatutoryAuditorOrSecretarialAuditorHoldsAValidCertificateIssuedByThePeerReviewBoardOfInstituteOfCharteredAccountantsOfIndiaOrInstituteOfCompanySecretariesOfIndia contextRef="D_ChangeInManagement1">true</in-capmkt:WhetherTheStatutoryAuditorOrSecretarialAuditorHoldsAValidCertificateIssuedByThePeerReviewBoardOfInstituteOfCharteredAccountantsOfIndiaOrInstituteOfCompanySecretariesOfIndia><in-capmkt:TypeOfChange contextRef="D_ChangeInManagement2">Re-appointment</in-capmkt:TypeOfChange><in-capmkt:CategoryForChange contextRef="D_ChangeInManagement2">Auditors</in-capmkt:CategoryForChange><in-capmkt:DesignationOfDesignatedPerson contextRef="D_ChangeInManagement2">Statutory Auditor</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:SalutationOfDesignatedPerson contextRef="D_ChangeInManagement2">M/s.</in-capmkt:SalutationOfDesignatedPerson><in-capmkt:NameOfDesignatedPerson contextRef="I_ChangeInManagement2">Gandhi Rathi &amp; Co.</in-capmkt:NameOfDesignatedPerson><in-capmkt:EffectiveDateOfReasonOfChange contextRef="I_ChangeInManagement2">2027-04-01</in-capmkt:EffectiveDateOfReasonOfChange><in-capmkt:TermOfAppointmentInMonths contextRef="D_ChangeInManagement2" unitRef="pure" decimals="INF">60</in-capmkt:TermOfAppointmentInMonths></xbrli:xbrl>
