Why does the Alwar manual give two very different kilowatt hour savings for efficient motors?

The Bureau of Energy Efficiency (BEE) Alwar manual gives about 14 lakh kilowatt hours (kWh) in section 3.4.1.5 but about 148 lakh in section 3.5. The rupee figure and cluster total fit 14 lakh far better, though the chapter 4 total is itself 112,905 kWh above the section sums. We found no cause for the larger pair.

The two figures

• Section 3.4.1.5 says energy efficient motors will save approx 14 Lakhs kWh for the Alwar and Sawai Madhopur units, worth about rupees (Rs) 70.0 lakhs. One lakh is 100,000, so that is 1,400,000 kWh.
• Section 3.5 says about 7,255,200 kWh for the expeller motors and about 7,555,200 kWh for the kolhu motors. Together that is 14,810,400 kWh, or 148.1 lakh.
• The two figures differ by a factor of 10.6 (14,810,400 / 1,400,000).

Which one the rest of the manual uses

• Rupees: 1,400,000 kWh x Rs 4.8 = Rs 67.2 lakh, close to the Rs 70.0 lakh in the section and the Rs 69.65 lakh in the summary table. 14,810,400 kWh x Rs 4.8 would be Rs 710.9 lakh, ten times the printed rupees.
• Cluster total: the manual's whole saving is about 2,036,450 kWh (printed as 20, 36,450) in chapter 4. The other rows add to 523,545 kWh; that count leaves out the 100 watt bulb row (3,140 kWh), the stabiliser and the diesel items. With 1,400,000 for motors the sum is 1,923,545, still 112,905 kWh below the printed 2,036,450. With 14,810,400 it would be 15,333,945, far above the printed total.
• Size: the cluster uses about 186 lakh kWh a year, 18,600,000. 14,810,400 would be 79.6% of all of it. 1,400,000 is 7.5%.

A test you can run on any motor saving

A better motor does the same work on a little less current. The manual's own sums show a few per cent. Its 50 horse power sum has a standard motor at 32 kilowatts and an efficient one at 30, a saving of 2 kW, 6.25%. It says efficient motors run 3 to 4 percentage points higher in efficiency. A saving of 79.6% of the whole cluster's electricity, or 84% of the motor share if the chart's 95% holds (14,810,400 / 17,670,000), cannot come from that.

So the 14 lakh figure is the one that fits. We did not find what the larger pair counts, so we do not say which line is the slip. Do not quote the 148 lakh figure.

What to put in your own record

• Use your own motor's measured kilowatts before and after, and your own running hours.
• Check any total by dividing it by your yearly kWh. If it saves most of your bill, it is wrong or it counts something else.

The two totals at the grid factor

• Section 3.5: 7,255,200 + 7,555,200 = 14,810,400 kWh
• Section 3.4.1.5: 14 lakh = 1,400,000 kWh
• Carbon dioxide (CO2) at 0.675 kg a kWh, the financial year 2025-26 grid factor: 1,400,000 x 0.675 = 945,000 kg, about 945 tonnes a year for the cluster
• 14,810,400 x 0.675 = 9,997,020 kg, about 9,997 tonnes, which would be about 80% of the CO2 of all the cluster's electricity (18,600,000 x 0.675 = 12,555,000 kg, 12,555 tonnes)
• A single 50 horse power (hp) motor at 2 kW saved for 3,000 hours: 6,000 kWh x 0.675 = 4,050 kg

kWh, rupees and the 186 lakh are the manual's own; CO2 is our arithmetic at the Central Electricity Authority (CEA) factor. The 3,000 hours is our assumption, taken from the kolhu report's 10 hours a day on 300 days; the manual's motor sum prints 7,000.

What Senseible does here

Senseible reads fuel invoices and electricity bills into monthly records, so the kWh for each bill you upload is on file by month. The bill shows the whole mill's electricity, not one motor's; for that you need a meter on each line or a few days of readings.

• Alwar oil mill manual totals checked
• Alwar efficient motor reports by size
• Efficient expeller kWh saving
• Check your own number

Sources: Bureau of Energy Efficiency (BEE), Manual on energy conservation measures in oil mills, Alwar cluster (SAMEEEKSHA), Central Electricity Authority (CEA), CO2 Baseline Database for the Indian Power Sector, version 22.0 (grid factor 0.675 kg CO2 per kWh, FY 2025-26)

Last reviewed 2026-11-07. Figures are from the BEE Alwar manual (sections 3.4.1.5, 3.5 and chapter 4). We did not find which of the two units figures is the slip, only which one fits the rupees and totals. The existing page on the manual's totals gives the 112,905 kWh gap in the chapter 4 total.