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Originally Posted by pugmanic
Hi, thanks for putting it so bluntly. I feel educated and scalded in equal measure.
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Eh, I think S is just a little grumpy for some reason.
They're right insofar as just adding an extra pack will add weight. The hybrid ECU won't recognize it as extra capacity, and an extra ~100lbs in any Prius would ding mileage by ~3% or so. At the same time, that might be offset by lower internal resistance and more efficient battery use.
If you installed a parallel pack or three and also installed another BCM to take advantage of those extra packs, then it's possible you might see an increase in mpg depending on where and how you drive.
https://sites.google.com/site/nwpriu...-plug-in-prius
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When driven beyond its CD range (about 12-14 miles), the car will operate as a standard Prius, but with slightly improved mileage (55-60 mpg), due to the extra battery capacity whose lower internal resistance allows for more efficient regeneration, as well as easy access to "super-highway-mode" because of the high SOC.
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