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post #16 of 22 Old June 15th, 2016, 10:51 AM
 
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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.
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post #17 of 22 Old June 15th, 2016, 10:53 AM
 
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Re: Polaris to release high performance electric RZR

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Originally Posted by Brinegardt View Post
Until the first lithium battery gets punctured and it goes into thermal run away bursting into flames and hopefully not injuring anyone..... As long as they figure out how to protect and cool the battery it might be cool.
Since we all know Polaris has an impeccable track record with fire safety in the gasoline products.
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post #18 of 22 Old June 15th, 2016, 11:13 AM
 
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Re: Polaris to release high performance electric RZR

Polaris can't even come up with a reliable voltage regulator in the current vehicles!!!. Hope they do there homework.
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post #19 of 22 Old June 15th, 2016, 11:15 AM
 
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Re: Polaris to release high performance electric RZR

Hahahahaha true...

"You weren't born to just pay bills and die"
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post #20 of 22 Old June 15th, 2016, 01:45 PM Thread Starter
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Re: Polaris to release high performance electric RZR

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Originally Posted by milligan View Post
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.
Milligan,

This is super interesting info, you seem to have a really deep knowledge, is this an industry you work in? I think you're right, even with current battery tech it's an uphill battle but if you're right and 1 gallon of gas equals 300lbs of lithium ion battery (I'm curious BTW where you got this stat) and combined with your stat that an electric motor set up is 5x as efficent then my simpleton math tells me that 300 lbs of batter equals the same output as 5 gallons of gas in an ICE RZR motor. That's not far off the current output. When you remove the need for gas (60lbs) and the engine (150lbs) plus all the fluids that support the engine like coolant, oil, etc. (10lbs) plus the transmission that wouldn't exist ((75lbs) plus all the drivetrain (50lbs - i'm assuming they'd run 4 small hub motors so no axles to break) you've shaved roughly 350lbs off the machine. Add back in your 300lbs in batters and your 4 small motors (20lbs each) and your wiring and controller (20lbs) you're not too far off the current weight of a rzr but with 1/4 the number of moving parts and a WAY lower center of gravity.

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post #21 of 22 Old June 15th, 2016, 01:52 PM
 
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Re: Polaris to release high performance electric RZR

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Let's establish one fact. Polaris is THE innovation leader in the UTV space today. They don't follow, they don't copy, they lead the way. This wasn't always the case, as you'll recall Yamaha started it all in 2004 with the Rhino. Yamaha again stepped up with the XYZ. Polaris will NOT be releasing a 2017 manual shift. Why not, because they aren't followers.
Polaris patented a manual paddle shift style CVT similar to what is available in automobiles. I doubt they would put forth the effort if they did not plan on releasing some version of it at some point in time. You'll see that and a single seat RZR long before your high performance electric RZR.

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post #22 of 22 Old June 15th, 2016, 03:30 PM
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Polaris to release high performance electric RZR

What if Polaris made a hybrid gas and electric like a McLaren p1 set up!!

Turbo 1000 144 hp and 50 hp electric motor with a paddle shifter set up !

Expensive but crawling and wide open throttle turbo plus e machine would be wicked !

Since they bought up all the electric companies and they have the turbo allready ???
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