Why does the Pune rubber cluster profile print 36,624 tonnes of carbon dioxide when today's factors give about 30,500?

The Pune rubber profile prints 34,686 tonnes of carbon dioxide (CO2) for 42.3 million kilowatt-hours (kWh), which implies 0.82 kg a kWh. At 0.675 for financial year (FY) 2025-26 the same power gives 28,553 tonnes. That difference explains essentially all of the gap between the printed 36,624 and about 30,500.

What the profile prints (2017-18)

• Electricity 42.3 million kWh: 34,686 tonnes of CO2. That is 0.82 kg a kWh exactly (42,300,000 x 0.82 = 34,686,000 kg).
• Light diesel oil (LDO) 536 tonnes: 1,707 tonnes, 3.185 tonnes a tonne. High speed diesel (HSD) 75 tonnes: 231 tonnes, 3.08 a tonne.
• Total 34,686 + 1,707 + 231 = 36,624 tonnes. The profile prints no factor and names no source for any of them.

Where the gap sits

• Electricity at 0.675 kg a kWh (FY 2025-26): 42.3 million x 0.675 = 28,553 tonnes, which is 6,133 less than printed.
• Fuel at the Intergovernmental Panel on Climate Change (IPCC) 2006 default for gas or diesel oil, 74,100 kg a terajoule and 43.0 terajoules a gigagram, which is 3.186 tonnes a tonne: LDO 1,708 (1 more than printed) and HSD 239 (8 more). Our reading: LDO sits on the gas or diesel oil line (about 0.85 kg a litre, under the 0.90 residual fuel oil test), and HSD is diesel. The IPCC names neither LDO nor HSD.
• Net: 36,624 minus 30,500 is 6,124 tonnes. The electricity difference is 6,133, so it explains all but 9 tonnes of the gap, because the fuel lines pull 9 tonnes back.

Which grid factor for which year

The printed 0.82 is higher than the last two years' factors, 0.710 and 0.675, and the Central Electricity Authority (CEA) updates the figure each year. It is not unexplained: CEA's 2017-18 average for conventional stations is 0.822, and its all-sources figure is 0.754 (see the linked page on TERI profiles). TERI does not say which it used. For a buyer asking about the current year, use 0.675 for FY 2025-26; for FY 2024-25 it was 0.710. A figure for 2017-18 should use that year's published factor, and the profile does not name one.

Power is 94.7 percent of the printed CO2 and 93.6 percent of the current figure, so the story for a Pune rubber unit does not change: bills for kWh come first, then boiler oil.

One medium unit and the cluster, side by side (our calculation)

• Medium unit, 2.4 million kWh: x 0.82 = 1,968 tonnes; x 0.710 = 1,704 tonnes (FY 2024-25); x 0.675 = 1,620 tonnes (FY 2025-26)
• Cluster electricity: 42.3 million kWh x 0.675 = 28,553 tonnes; x 0.710 = 30,033 tonnes
• Cluster total at current factors: 28,553 + 1,708 + 239 = 30,500 tonnes
• Printed total: 36,624. Gap: 36,624 minus 30,500 = 6,124 tonnes

Each year's figure is right for its own year. Do not mix an old factor with a new year's kWh.

What Senseible does here

Senseible reads fuel invoices and electricity bills into dated, fingerprinted records, so your kilowatt-hours and litres are on file by date. A cluster table does not replace your own bills.

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• Your MSME carbon number

Sources: TERI, Energy profile: Pune rubber cluster (energy and CO2 table, 2017-18), IPCC 2006 Guidelines, Volume 2, Chapter 1: Introduction (Table 1.2 net calorific value, Table 1.4 CO2 emission factor, gas or diesel oil), CEA, CO2 Baseline Database for the Indian Power Sector (0.675 kg CO2 per kWh, FY 2025-26)

Last reviewed 2026-11-06. Check the CEA database each year, because the grid factor is updated.