Two different ways to charge your electric vehicle battery one is of course at home using the ac current and the other is when you visit a fast charger and you're using a dc curren.

 

what are the rates how much are you expected to pay when you charge your vehicle at home versus in a charging station ?

As we all know that petrol and diesel price are increasing day by day and people are showing more 

interest and they are shifting towards eevee and government is also helping them by

giving subsidies.

 I give you the exact rates that you pay when you charge it at a station versus what your bill will be at 

home i'll first have to explain a process to you which is the process of loss all right for calculation let 

us take the battery of ola s1 which has a capacity of 2.98 kilowatt hour in an ideal condition to charge a 

battery of 2.98 kilowatt hour you will be drawing 2.98 units of electricity that never happens though 

because there are three kinds of losses that come in one is the energy loss that happens when the 

electricity passes through the charging cable the internal resistance of the cable rises up the heat and 

therefore there is a loss heat energy loss and then again this electricity when it is passing through the 

not electricity electrons to be precise when the electrons are passing from anode to cathode to charge 

up your battery.

it also comes across the internal resistance of the battery which rises the temperature again there is a 

loss in terms of heat energy the second kind of loss happens in the form of magnetic energy which is as 

per the principles of  electromagnetism.

The third kind of loss happens in the dc ac to dc converter so our battery does not accept ac current it is 

charged only using dc current but what we get at home is an ac current so there is a converter in the 

vehicle itself which converts this ac current into dc current  this conversion results into a loss of energy 

so all these three factors they bring up an efficiency of 90 percent with 10 percent being lost

Now there's another factor which is the bms the job of the bms is not only to monitor the temperature 

regulate the temperature of  the battery it is also monitoring the voltage levels of individual cells each 

cell has to be in the same voltage level that is what the bms does which means the bms will be 

distributing the energy  into all the cells while distributing there is also a loss because the bms is again 

not 100 efficient let us factor in another 10 percent loss with the bms being 90 now if we are to 

calculate an overall efficiency we will have to multiply the efficiency received from the first case the 

second case and we get an overall efficiency of 0.9 into 0.9 which is 0.81 now in our original 

calculation we took the battery capacity to be 2.98 kilowatt hour the new efficiency of our entire 

system is 0.81 or 81 percent if you factor in the 20 or precisely 19 loss what you get is a current of 3.67 

units which means to charge your battery  of 2.98 kilowatt hour capacity you will be drawing 3.67 

units of electricity this concept was needed.

 

Now give you exact rates that you will have to pay when you are charging your  vehicle at home or at 

the station for  this calculation we will take into account the TATA  Nexon Ev which has a

battery capacity of 30 kilowatt hour the dc fast charging rate will of course depend on the company that 

you have  visited for our calculation we'll take the tata power now when you take your  vehicle to a tata 

charging station you will be paying depending on the duration the time duration until which you are 

using the services for a charger usage of 15 minutes you will be paying an amount of 112 rupees now 

mind you if you charge your battery from a 0 to 80 percent because beyond that your fast charging will 

be cut off and it's only a slow charge so it makes no sense so suppose you're charging your battery from 

0 to 80 percent you will be paying 300 rupees in a fast charging station now what is the electricity bill 

that  you will pay when you charge your nexon ev at your home using ac current for this calculation of 

course we will

consider zero to hundred percent in dc we consider zero to eighty percent wherein you paid three 

hundred rupees like i said beyond eighty percent it is cut off  at home you will be charging your

vehicle from zero to hundred percent and the rates will of course depend on which state you live in and 

i'll tell you the rates of some of the states that i have here if you're living in andhra pradesh

you'll be paying only 78 rupees for people in assam it is 148 rupees bihar 193 delhi 90 rupees for 

people of goa you'll be paying only 68 rupees gujarat 105 rupees jharkhand 115 karnataka 181

madhya pradesh 152. maharashtra has too many discounts so i did not take that into calculation for 

tamilnadu it is only 60 rupees telangana 130 rupees uttar pradesh 181 and west bengal 210

rupees so these are the charges that you are expected to pay when you are charging your next navy 

from 0 to 100 as against a dc current dc charger where you are charging from 0 to 80 and paying 300 

rupees.


                   Always prefer to charge your vehicle at home using slow charging do check.