Join Date: Aug 2015
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Re: Polaris to release high performance electric RZR
Something to think about isn't just range, but energy. Since we don't buzz down roads with these, range isn't a good indicator since we could be flying through the desert or rock crawling. Think about gas having an equivalent to 33kwh of energy. RZR holds 9 gallons, so around 300kwh of energy. The Tesla 3 only has a 60 kWh battery, why? Motor efficiency. Gas engines are only 25% efficient while electric motors can be 75% efficient. Usually electric motors can be directly connected without a transmission, so the gas engine sees another 20-30% reduction in energy that the electric motor does not.
So a gas engine will only put down about 15-18% of the energy in its fuel, while an electric motor will put down upwards of 75%. That means you need roughly 5x less energy onboard for the same effective energy. Other factors including regenerative braking and a smart motor controller can bring that effective energy even higher.
The issue is still battery weight. One gallon of gas is equivalent to a 300lb lithium ion battery pack! Even with the efficiency differences and the weight savings from going with an electric motor instead of a gas engine, there are going to be issues.
Really interested to see if Polaris goes this direction.