Financial Assessment of EV Charging Connection

Whether separate EV meter connection is economical or not?

• Mr. XYZ of Ahmedabad city want to purchase an EV Car whose battery capacity is 45 kWh. 
• He want to separate EV connection, whether it is economical or not? 
• The family’s average monthly residential average consumption is 400 units.  What is most economical option for family.
• Torrent power energy charges ( Rs. / kWh ) based on monthly consumption is given here.

First 50 units	Next 150 units	Remaining units
Rs. 3.20	Rs. 3.95	Rs. 5.00

•  The Ahmedabad EV tariff charge of Rs. 4.10 per unit and considering no demand charge ( which is actually Rs 25 per kVA per month ). 
• The monthly electricity consumption from EV charging is approximately 200 units. 
• Therefore average electricity consumption per month is expected to be around ( 400 + 200 ) is equal to 600 units.
• Electricity charges only for energy charges slab-wise

Pre EV Charging ( 400 units )			Post EV Charging ( 600 units )
Energy Charges	Number of unit billed	Energy charge	Energy Charges	Number of unit billed	Energy charge
Rs. 3.20	50	160	Rs. 3.20	50	160
Rs. 3.95	150	592.5	Rs. 3.95	150	592.5
Rs. 5.00	200	1000	Rs. 5.00	200	1000
-	-	-	Rs. 5.00	200	1000
		1752.5			2752.5

•  Mr. XYZ has energy charges of Rs. 2752.5 post EV Charging.

Separate EV Meter Connection

• The energy charges for EV connection is Rs. 4.10 per unit. Let us calculate total energy charges after separate EV meter.

Pre EV Charging ( 400 units )			Post EV Charging ( 600 units )
Energy Charges	Number of unit billed	Energy charge	Energy Charges	Number of unit billed	Energy charge
Rs. 3.20	50	160	Rs. 3.20	50	160
Rs. 3.95	150	592.5	Rs. 3.95	150	592.5
Rs. 5.00	200	1000	Rs. 5.00	200	1000
-	-	-	Rs. 4.10	200	820
		1752.5			2572.5

Mr. XYZ has energy charges of Rs. 2392.5 post EV Charging if he purchase separate EV meter. He has profit of Rs. 180 ( Rs. 2752.5 – Rs. 2572.5 ) per month after installation of EV meter.

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