Selling UPS with External Battery Attracts Highest GST Rate
Selling a UPS system with an external battery for a single price is a mixed supply taxed at the highest GST rate.
- Ruling
- Appeal Case No. 04/WBAAAR/Appeal/2018 dated 25.07.2018
- Dated
- 25 Jul 2018
- Authority
- Appellate Authority for Advance Ruling
This page was written by Patron Accounting’s AI from the official release and reviewed before publishing. It explains the document in plain language. It is not the document itself. Where this page and the original differ, the original governs.
The short version
- A company asked if selling UPS with external batteries is a composite supply.
- The authority ruled the combination is a mixed supply under GST law.
- External batteries have independent uses and are not naturally bundled with UPS units.
- Selling them together for one price attracts the highest applicable GST rate.
In short
Switching Avo Electro Power Limited asked whether selling an Uninterrupted Power Supply (UPS) unit along with an external storage battery under a single combined price counts as a composite supply or a mixed supply under GST. The company argued that the two items function together as a complete power backup system. However, tax officers maintained that an external battery is a separate commercial product sold independently for many other uses.
What has changed
How it worked before
Before this ruling, many power equipment manufacturers assumed that selling a UPS and an external battery together formed a single naturally bundled package, similar to a UPS with an in-built battery.
What has changed
The West Bengal Appellate Authority for Advance Ruling (AAAR) ruled in order 04/WBAAAR/Appeal/2018 that a UPS converter bundled with an external storage battery for one price is a mixed supply. Because external batteries can be used for other machines, they are not naturally bundled in the ordinary course of business. As a result, businesses selling this combination for a single price must pay GST at the highest tax rate among the bundled items.
Who this affects
Businesses that manufacture or sell power backups, UPS systems, solar equipment, or industrial batteries under single-price packages.
An example
NextGen Power Systems sells office backup kits containing a UPS unit and an external lead-acid battery for a single package price of ₹20,000. Following the logic of this ruling, if NextGen sells them together at one combined price, the tax department will treat it as a mixed supply and levy GST at the higher battery rate on the full ₹20,000 package. To avoid paying the higher rate on the entire amount, NextGen can list the UPS and external battery separately on the invoice with individual prices and apply their respective GST rates.
What you should do
Check if you sell UPS units and external batteries for a single total price on a single invoice line. If so, consider listing separate prices for the UPS and battery on your invoices, or pay GST at the highest applicable rate. Remember that an advance ruling directly binds only the company that applied for it and their local tax office, so consult your tax practitioner before changing your pricing structure.
If you do nothing
If you sell external batteries and UPS units together for a single price but apply a lower GST rate, tax officers can reclassify the transaction as a mixed supply during an audit. You would then have to pay the tax difference at the highest applicable rate for all past sales. You could also face interest charges at 18% per year and penalty fees for underpaying GST.
The terms explained
- composite supply
- Two or more goods or services sold together that naturally belong together in ordinary business, taxed at the rate of the main item.
- mixed supply
- Two or more independent items sold together for a single price when they do not naturally belong together, taxed at the highest rate among them.
- static converter
- The electronic part of a UPS system that converts direct current power from a battery into alternating current power for appliances.
The ruling in detail
Appellate Authority for Advance Ruling
M/s Switching Avo Electro Power Limited
Appeal Case No. 04/WBAAAR/Appeal/2018 dated 25.07.2018 · West Bengal
Questions before the authority
- Whether Uninterrupted Power Supply (UPS) supplied with an external storage battery is naturally bundled and hence a composite supply under the GST Act, or a mixed supply.
Facts
The Appellant is a manufacturer and supplier of power backups and solar products, including Uninterrupted Power Supply (UPS) systems and storage batteries. The Appellant sought advance ruling on whether supplying a UPS along with an external storage battery under a single contract at a combined price is a composite supply or mixed supply. The West Bengal Authority for Advance Ruling held that the transaction constitutes a mixed supply under Section 2(74) of the GST Act, against which the Appellant filed this appeal.
Ruling
The Appellate Authority upheld the ruling of the lower authority, confirming that external storage batteries and UPS static converters supplied together for a single price do not qualify as a composite supply. Because external batteries have multiple independent uses and are not naturally bundled with UPS units, the combination is a **mixed supply** under Section 2(74) of the GST Act.
Reasoning
The AAAR noted that while a UPS with an in-built battery forms an inseparable composite supply, an external storage battery is not naturally bundled with a static converter (UPS). External batteries can be put to distinct and varied uses independent of the UPS and are regularly sold separately. Section 2(30) requires supplies to be naturally bundled in the ordinary course of business to constitute a composite supply. Furthermore, pre-GST Excise and Customs case laws cited by the Appellant were found inapplicable as they did not interpret statutory definitions of **composite supply** and **mixed supply** unique to GST law.
Provisions relied on
- Section 2(30) of the GST Act, 2017
- Section 2(74) of the GST Act, 2017
- Section 2(90) of the GST Act, 2017
- Notification No. 01/2017-Central Tax dated 28.06.2017
- Notification No. 1125-FT dated 28.06.2017
For the practitioner
This ruling establishes that bundling a static converter (UPS) with an external storage battery under a single price constitutes a **mixed supply** under GST law. Pre-GST classification rulings under Excise/Customs cannot be relied upon to determine natural bundling under GST definitions. Suppliers must charge tax at the highest rate applicable among the items in such a single-price combination.
Source
This is a summary prepared from the published order, which is a scanned document. It is a reading aid and not the authority: where the two differ, the order governs. Verify every provision against the original before relying on it.
Original order: https://www.gstcouncil.gov.in/sites/default/files/2024-02/wbaaar-appeal_no-04_2018_dt_25-07-2018.pdf
Legibility of the scan, as read: high.
Prepared 21-10-2026.
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