BHPian caravatar01 recently shared this with other enthusiasts:Hyundai Creta EV Range Mismatch : Battery % vs MID EfficiencyI have just completed 2000km on my Creta EV LR in last 3 weeks and have done multiple 300+ km trips around Bangalore already. The car provides elevated comfort and good range on a single charge. The efficiency of the car is also top notch. However, i am struggling with calculating the actual range of my car. In my view, there are 2 ways you can calculate the range of your car (if you are not draining from 100-0%). Both ways use only historical data, and no forecast range. 1. Record the % of the battery at the start and end of your trip. Also, record the reading of your ODO at start and end of your trip. Divide the ODO difference with battery % difference to get the range. 2. Reset the trip to 0 at start of the trip and then record MID efficiency shown (km/KwH) at the end. Multiply that efficiency by 51.4KwH (which is the battery capacity of Creta EV LR). Both these methods use the data provided by MID itself, and no external data collected. However, when i use these both methods in parallel, i get different range values. Example 1: Trip to Chitradurga During my recent Visit to Chitradurga Fort, i started with a battery% of 88% with ODO reading of 810km. When i reached the fort, battery% was 37% and ODO reading was 1012km. (Both screenshots above). This translates to a trip of 202km using 51% of the battery. So, if we extrapolate the range, It would be 202/51*100, which is 396km. However, when looking at efficiency shown by MID, it said 8.3km/KwH. If we extrapolate the range by the second method, the range comes out to be 8.3*51.4, which is 426km. That is a difference of 30km! I understand the differences can be in the range of 10km, given rounding errors in battery%, MID efficiency and ODO, but 30km if too much! 30km is roughly 7% battery (if considering a range of approx 400km). Moving ahead on the same trip, before i DC charged my car at Paakshala, the battery % remaining was 16% and ODO was 1088km. So, by same calculation as above (comparing against starting point of 88% and ODO 810km), battery used is 72% for a distance of 278km. This translates to a range of 386km. However, MID efficiency shown was 8.2Km/KwH, which extrapolates to 421km. Hence, the difference in both these calculations further widens to 35km. So, during this trip, the Battery% calculation is lesser than MID efficiency calculation, by approx 30-35km! Example 2: Trip to Sula I started my trip with a battery % of 83% and ODO of 1674km. On the Mysore Expressway, when we stopped for breakfast, Battery% was 59% and ODO reading was 1802km. Hence, used 24% battery for 128km distance, which translates to a range of 128/24*100, which is 533km! Yes, somehow, on this route, i get amazing range. However, the MID showed efficiency of 9.6km/KwH, which when multiplied by 51.4, provides a range of 493km. This is 40km lesser than previous method. And this time, battery% calculation is higher than MID efficiency calculation. So, there is no pattern that MID efficiency shown in higher than what it is. On the same trip, when i reached back home, i had 19% battery left and 1946km on ODO. This means 64% battery used for 272km (against starting at 83% with ODO 1674km). Range by this method is 425km. MID efficiency shown was 8.5km/KwH, which translates to 437km (when multiplied by 51.4). Difference in this case is 12km, which is guess is acceptable given rounding errors. But wait, the plot thickens! I plugged my car in at 6% yesterday. This was the first charge since the trip. The below screenshot was taken then. Against starting point of 83% battery and ODO 1674km, car had run 310km with battery usage of 77%. By same logic as above, this translates to range of 402km (310/77*100). But as you can see, MID shows effiency of 8.5km/KwH, which when multiplied by 51.4, gives a range of 437km. Again, the difference here becomes 35km! Example 3:Trip to Sivanasundaram Falls This was our first trip. We started our trip with 83% charge and 224km on the ODO. When we reached our breakfast stop, the battery% was 64% and ODO at 317km. That means 19% charge used for 93km distance. This translates to range of 489km using the first method. MID effieincy shown was 9.4km/KwH, and by second method is 483km (multiply 9.4 by 51.4). The difference here is just 6km which is acceptable. Few reasons I can think of on why the car is behaving like this are:1. Idling time of the car. However, I do not idle the car much. 2. Battery percentage drop when car is standing overnight after a long trip. I have noticed that although during regular use, the battery drop % overnight is not significant, but when i comes back from a day trip of 300km+, the overnight battery drop is in tune of 2-3% for the first night. Maybe auto battery conditioning taking up some % of the battery? However, i have not switched it on manually if there is a way to do that. This point may particularly apply to the last calculation i did for my previous cycle. I will continue to monitor this. For this charge cycle, I have no day trips planned. So, mostly would be max 50-60km city drives. I am keen to understand how range calculation differs using the two methods in this cycle. None the less, the car does provide a range of 400km+ on highway trips with my driving style, whatever the method of calculation is. City P50 range is around 425-430km. Check outBHPian commentsfor more insights and information.
