GST Rate on Solar Panels

Solar panels are the single largest line item in any rooftop solar project, often 40–50% of the total installed cost. Getting the GST rate, HSN code, and Input Tax Credit (ITC) treatment right on this one component alone can save your EPC business ₹15,000–₹40,000 per project in correctly recovered tax. Yet these are the details most EPC owners get wrong when they start out.

If you're looking for the broader picture of how GST applies across the entire solar system, modules, inverters, mounting structures, installation services, and composite supply rules, read our companion guide on GST on solar systems in India. This post digs specifically into solar panels: the product classification, the rate history, and the compliance checklist every EPC needs on their wall.

Current GST rate on solar panels, 12% under HSN 8541 42 00

The current GST rate on solar photovoltaic (PV) modules and cells in India is 12%. This has been the standard rate since the GST Council corrected a brief anomaly following the 2021 GST rate rationalisation exercise.

To be precise about what this covers: solar PV cells (the semiconductor chips that convert sunlight to electricity), solar PV modules (assembled panels of cells), and solar PV arrays (strings of modules) all fall under HSN 8541 42 00 in the Harmonised System of Nomenclature as revised in 2022. Prior to the HSN revision, these goods were under the 8541 40 sub-heading.

The key insight: the 12% rate is the standalone goods rate. Once panels become part of a turnkey residential EPC, the transaction is classified as a composite supply and the whole thing is taxed at 5%, not 12%. The practical implication is that your procurement invoices (when you buy panels from a distributor) show 12%, but your sales invoices (when you sell the finished residential EPC system) show 5% on the total, and you recover the ITC difference.

According to MNRE's Approved List of Models and Manufacturers (ALMM), only domestically manufactured modules are eligible under PM Surya Ghar Muft Bijli Yojana. This Domestic Content Requirement (DCR) affects which panels you purchase, and therefore which supplier invoices feed your ITC claims.

The Solar Panel GST Compliance Checklist, 6 steps, no gaps

The Solar Panel GST Compliance Checklist is the proprietary framework that covers every GST touchpoint for solar panels from procurement to sales invoice to return filing. Work through it in order for every new project cycle.

1. 1

   HSN code, confirm 8541 42 00 on supplier invoice

   Check that your panel supplier's invoice shows HSN 8541 42 00 and GST rate 12%. If the invoice shows a different code or rate, raise a debit/credit note before claiming ITC, mismatched HSN creates a GSTR-2B mismatch that triggers GST scrutiny.

2. 2

   ITC eligibility, verify your output supply is taxable

   ITC on panels is available if and only if your output supply (the EPC contract or panel resale) is taxable under GST. Residential EPC at 5% is taxable. Commercial EPC at 12% is taxable. If any part of your supply is exempt, you must apply the proportional reversal rule under Rule 42 of the CGST Rules.

3. 3

   Invoice format, full details, correct rate, correct place of supply

   Your sales invoice for a residential EPC must show: GSTIN, customer details, full description ("Solar PV System, 3 kW, comprising 6 modules of 500 Wp + string inverter + BOS"), HSN/SAC code, value, and 5% GST. Do not list panels separately at 12% on the same invoice as the EPC system.

4. 4

   Reverse charge check, are your sub-contractors registered?

   If you hire unregistered persons for installation labour, reverse charge mechanism (RCM) applies under Notification No. 13/2017-CT(R). You pay 18% GST as the recipient and then claim it as ITC. Confirm every sub-contractor's GSTIN before issuing work orders, it's the simplest way to avoid RCM complexity.

5. 5

   GSTR-1 reporting, report correctly in B2B vs B2C

   Residential solar customers are almost always unregistered (B2C). Report these sales in GSTR-1 under the B2C (Other) column with the correct HSN and rate. If a customer is GST-registered (e.g., a housing society), report in B2B with their GSTIN so they can claim ITC.

6. 6

   Annual ITC reconciliation, match GSTR-2B before March 31

   Reconcile your ITC claims on panel purchases against the supplier's GSTR-2B entries before the annual return (GSTR-9) is filed. Panels are high-value items, a single unmatched invoice means forfeiting 12% of that panel purchase value in ITC. Chase your distributor to file correctly.

ITC on solar panels, what the law actually says

Input Tax Credit on solar panels is not automatic, it's earned by meeting four conditions under Section 16 of the Central Goods and Services Tax (CGST) Act, 2017. Understanding these conditions prevents ITC reversal demands.

Condition 1: You must possess a valid tax invoice. The supplier must be registered, and the invoice must show the correct HSN (8541 42 00), the correct rate (12%), and your GSTIN as the recipient. A delivery challan or proforma invoice doesn't qualify.

Condition 2: You must have received the goods. You can't claim ITC until the panels are physically delivered to you or your customer's site. This matters for advance payments to distributors, ITC accrues on delivery, not on payment.

Condition 3: Your supplier must have filed their GSTR-1 and the tax must appear in your GSTR-2B. As of Financial Year 2022–23 and beyond, CBIC has tightened this, ITC can only be claimed if it appears in your GSTR-2B auto-populated statement. If your module supplier delays filing, your ITC is delayed too.

Condition 4: The ITC must not be blocked under Section 17(5). For solar panels going into EPC contracts, they are not blocked, but you need to be able to show they were used for a taxable outward supply.

The ITC math works in your favour as an EPC. You buy panels at 12% GST and sell residential EPC contracts at 5% GST. The input tax (12% on panels + 12% on inverters + 18% on mounting + 18% on cables) exceeds the output tax (5% on the sale). This creates an ITC surplus, a refund situation under Section 54 of the CGST Act.

This inverted duty structure (paying higher GST on inputs than you collect on output) means EPC businesses should file for GST refunds under the inverted duty refund mechanism, which was upheld by CBIC for solar EPC contractors in 2022. Don't leave this money unclaimed.

GST invoice format, what every solar panel supply invoice must include

Whether you're a distributor selling panels to an EPC, or an EPC buying panels for a project, the invoice must comply with Rule 46 of the CGST Rules, 2017. Here's the complete list of what must appear on a solar panel supply invoice:

The supplier's name, address, and 15-digit GSTIN. The sequential invoice number and date. The buyer's name, address, and GSTIN (for B2B supplies). The description: be specific, "Solar PV Module, Monocrystalline PERC, 550 Wp, as per BIS IS 14286 (2022), ALMM listed, Make: [Brand], Model: [Model No.]". The HSN code: 8541 42 00 (mandatory at 6 digits for annual turnover above ₹5 crore; 4 digits below ₹5 crore). Quantity and unit of measure (Nos.). Rate per unit and total value. Applicable GST rate: 12% (6% CGST + 6% SGST for intra-state; 12% IGST for inter-state). The place of supply, critical when the supplier is in Gujarat and the project site is in Maharashtra. Signature of the supplier or authorised representative.

DCR panels and PM Surya Ghar, the compliance overlap

PM Surya Ghar Muft Bijli Yojana requires EPC contractors on the scheme to install only Domestic Content Requirement (DCR) compliant panels, modules listed on MNRE's Approved List of Models and Manufacturers (ALMM). This has a direct impact on GST compliance.

When you buy ALMM-listed panels from an approved manufacturer, you need to retain the manufacturer's ALMM certificate number alongside the GST invoice. During DISCOM inspection or scheme audit, both documents will be checked. If you've claimed ITC on a non-ALMM panel purchase that was later disallowed from the PM Surya Ghar project, you'd need to reverse that ITC.

According to PM Surya Ghar National Portal, vendor registration requires the EPC to commit to using ALMM-listed modules on all scheme projects. The Indian Renewable Energy Development Agency (IREDA), which channels funds for PM Surya Ghar financing, also maintains compliance checks on ALMM usage. EPCs who repeatedly install non-ALMM panels risk removal from the vendor registry, which eliminates access to the concessional loan facility for their customers.

For a detailed look at PM Surya Ghar subsidy amounts and eligibility, see what is PM Surya Ghar Yojana and how to calculate PM Surya Ghar subsidy. For cost projections by system size that include the correct GST amounts in your quoted price, see PM Surya Ghar cost by system size.

GST rate history, why some EPCs still think panels are at 5%

There's real confusion in the market about whether solar panels are at 5% or 12%, and it comes from a genuine regulatory history. Here's the timeline that explains it.

EPCs who started their business before October 2021 may still be operating on the old mental model of 5% on panels. This creates both compliance risk (charging customers 5% on what should be 12%) and missed ITC opportunity (not properly accounting for the higher input tax). If you're in this group, an urgent review of your purchase records and GSTR-2B from October 2021 onwards is warranted.

Comparison, standalone panel supply vs composite EPC on customer bill

The rate difference between selling panels standalone vs as part of an EPC has a direct impact on your customer's total outlay. This matters when you're closing a deal and the customer is comparing your quote to a competitor who handles it differently.

The numbers are clear: composite EPC invoicing is better for the customer, legally correct for residential projects, and protects your EPC from misclassification risk. If you're currently using split invoices, this is worth changing before your next assessment.

For more on how these rates affect the total system price for customers considering 3 kW solar systems, 5 kW solar systems, and 10 kW solar systems, those guides include GST-inclusive cost comparisons. You can also see how to build this into your proposal using our solar cost per watt guide.

How QuickEstimate keeps your GST treatment consistent across every proposal

When Imran, a solo installer in Aurangabad, uses QuickEstimate's Proposal Generator, the GST rate is set once in the system configuration, 5% for residential, 12% for commercial, and every proposal generated by the app automatically shows the correct rate, the correct HSN code on the itemised view, and the correct total with GST. No manual calculation, no scope for the wrong rate slipping through on a quote.

This matters even more for Rohit's 12-person Surat EPC. When field reps are sending 40–50 proposals a month from their phones, one wrong GST rate on a proposal creates a revision cycle that wastes the rep's time and the customer's patience. QuickEstimate eliminates that friction entirely.

• Proposal Generator, GST rate (5% or 12%) pre-configured per project type; automatically applied to every proposal PDF.
• Quotation System, Centralised HSN code and rate settings mean your ops lead sets it once, all reps inherit it.
• Sales Reports, Monthly GST liability summary by project category, so your CA has the numbers ready for GSTR-1 filing.

For the full picture of how GST interacts with your EPC's accounting, see Excel for solar tax management. For the broader composite supply and project-level GST rules, revisit GST on solar systems in India.

What to do this week, for your EPC

1. 1

   Verify your last 3 months of panel purchase invoices for HSN 8541 42 00

   Pull all supplier invoices from your last 3 months and confirm the HSN code is 8541 42 00 (or 8541 40 if pre-2022 HSN). Cross-check with your GSTR-2B to ensure the ITC has been reflected. Raise credit notes with your distributor for any mismatches before the annual filing deadline.

2. 2

   Check if you have accumulated ITC surplus and file for refund

   If you do predominantly residential EPC work, you almost certainly have an inverted duty structure ITC surplus building up. Ask your CA to calculate the refund eligible under Section 54 of the CGST Act, for a mid-size EPC doing ₹40 lakh per month in residential projects, this can be ₹2–3 lakh annually.

3. 3

   Set up your proposal tool with the correct GST configuration

   If you're still manually calculating GST on proposals in Excel, switch to a system where the rate is pre-configured. At minimum, update your template so residential and commercial projects automatically show different rates. See how QuickEstimate handles this at quickestimate.co.

Frequently asked questions

What is the HSN code for solar panels in India currently?

The current HSN code for solar photovoltaic cells and modules in India is 8541 42 00, effective from the 2022 HSN revision. Before 2022, the code was under the 8541 40 sub-heading. Both refer to "Photovoltaic cells, whether or not assembled in modules or made up into panels." The GST rate under this HSN for standalone supply is 12% (6% CGST + 6% SGST for intra-state transactions, or 12% IGST for inter-state).

What was the GST rate on solar panels before October 2021?

Before October 2021, solar PV panels attracted 5% GST. The GST Council's 45th meeting (September 2021) rationalised the rate to 12%, effective from October 1, 2021. The rationale was revenue neutrality, since many EPCs were in an inverted duty structure at 5%. The 5% rate still exists but only for the composite solar power generating system supplied as a complete residential EPC, not for standalone panel supply.

Can I claim ITC on solar panels purchased for residential EPC contracts?

Yes. If your output supply is a taxable EPC contract (residential at 5% or commercial at 12%), ITC on solar panels purchased at 12% is fully available. The condition is that the purchase is for business use and the tax appears in your GSTR-2B. For residential EPC, since you charge 5% output and incur 12% input on panels, you will accumulate excess ITC, this is an inverted duty refund situation under Section 54 of CGST Act.

Does the customer pay 12% GST on solar panels when I sell them a complete system?

No. When you sell a complete residential solar EPC system as a composite supply, the customer pays 5% GST on the entire contract value, not 12% on the panels and 18% on installation. The composite supply rule means the whole transaction takes the rate of the principal supply (the solar system), which is 5% for residential. This is one of the most customer-friendly aspects of solar GST classification.

What are ALMM-listed panels and do they affect GST?

ALMM (Approved List of Models and Manufacturers) is a list published by MNRE of solar modules that meet Domestic Content Requirement (DCR) standards. ALMM-listed panels are mandatory for PM Surya Ghar and most government-funded solar schemes. ALMM status does not change the GST rate (still 12% for standalone supply), but it affects subsidy eligibility, non-ALMM panels will result in the customer's PM Surya Ghar application being rejected. Always verify ALMM status before bulk purchasing.

How does reverse charge apply to solar panel installation?

Reverse Charge Mechanism (RCM) applies when an EPC hires unregistered persons for installation labour. Under Notification No. 13/2017-CT(R), the EPC (as the registered recipient) pays 18% GST on the unregistered contractor's service. The EPC then claims this as ITC. RCM does not apply to solar panels themselves, it only applies to the service portion when the service provider is unregistered.

Should I show panels separately on the customer's invoice?

No, if it's a residential composite EPC. Show the entire system as a single line item: "Supply and Installation of 3 kW Solar Rooftop Power Plant" at one total value with 5% GST. Showing panels separately at 12% on the same invoice as the installation converts the transaction from composite to potentially mixed supply, which can attract the highest rate (18% on the installation portion) and creates compliance risk.

Is there a difference in GST for monocrystalline vs polycrystalline vs bifacial panels?

No. All solar photovoltaic modules, monocrystalline, polycrystalline, half-cut, bifacial, TOPCON, HJT, fall under HSN 8541 42 00 at 12% GST. The technology type does not change the GST classification or rate. The distinction only matters for ALMM eligibility (some module technologies may be listed, others not) and for performance guarantees, but the GST treatment is identical.