The volt also runs the engine a bit in cold weather to warm up the batteries 
which probably helps the life. It’s a ‘feature’ I didn’t like at first but have 
accepted. 

-Steve

> On Dec 19, 2020, at 11:07 AM, Peter VanDerWal via EV <[email protected]> 
> wrote:
> 
> Depends on how the vehicle is designed.   I don't know about the Rav4, but I 
> am familiar with the Chevy Volt.  From what I understand, because of the way 
> Chevy designed them, even the original Volts still have 100% of their 
> original battery range.
> 
> What Chevy did was never allow you to use 100% of the battery's capacity.  
> They always maintained the battery somewhere between 10-20% SoC and 80-90% 
> SoC.  The system is designed to never allowed it to fully charge, or fully 
> discharge.  This not only extended the battery life significantly, but 
> allowed a buffer so that as the battery ages you lose the buffer rather than 
> the core range.
> I'm sure eventually they will run out of buffer and then the owners will 
> start to see a drop in range, but even on the 10 year old vehicles that's not 
> happening yet.
> 
> I just wish that Chevy's marketing and sales folks were 1/2 as good as their 
> engineers.
> 
>>> 42 Miles EV range and 3 full size back row seats. (compared to Prius
>>> Prime range of only 25 mi.) Her daily average mileage is on the order of 35
>>> mi+.
>> 
>> That 20% doesn't seem like much of a range buffer. Seems to me she's likely
>> to run short in cold weather, and probably on hot summer days when whe wants
>> aircon.
>> 
>> The range will fall as the battery ages, too. At 80% battery capacity, it
>> won't be enough no matter what the conditions are.
>> 
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