125 MPGe tested by the EPA. Hyundai already announced that its electric car with a 28 kWh battery gets a 110 miles (177 km) EPA range. But now Hyundai has released its efficiency EPA figures. While city and highway efficiency rates are still unknown, the combined MPGe is 125. The 125 MPGe (16,75 kWh/100 km) makes it the most efficient car tested by the EPA that is currently on sale. These are the EPA top 5 most efficient cars: 1. 2017 Hyundai IONIQ electric: 125 MPGe (16,75 kWh/100 km) 2. 2017 BMW I3 BEV (60 Ah battery): 124 MPGe (16,88 kWh/100 km) 3. 2017 Chevrolet Bolt EV: 119 MPGe (17,64 kWh/100 km) 4. 2016 Chevrolet Spark EV: 119 MPGe (17,64 kWh/100 km) 2017 BMW I3 BEV (94 Ah battery): 118MPGe (17,83 kWh/100 km) Obviously the most efficient cars are also electric. Also important is that EPA measures the energy consumption for electricity from wall-to-wheel, this way the charging efficiency matters. We’re still disappointed with the low battery capacity and the high price. But, Hyundai IONIQ EV does have some advantages. Its efficiency and fast charging rate. Hyundai says that this electric car can charge from 0 to 80 % in just 24 minutes at a DC fast charger, that’s 56 kW in average, while the max charging rate surpasses 60 kW. In late 2017, if Hyundai increases the usable battery capacity from 28 to 42 kWh while maintaining the weight, the EPA range can increase from 110 to 165 miles (265 km). In 2017, a 40 kWh battery is the minimum acceptable for electric cars that cost more than 30.000 € before government incentives.