The Volt's SOC range is generally from 22% to 87% so 65% used. It can dip into the teens. (LEAF has 21kWh usage out of 24kWh so ~87.5%)Herm wrote:The Volt's battery has as 40% reserve buffer that is never used, to extend battery life.. for all we know there may be Volts in Phoenix that have already lost some of that, yet the "usable kWh" display remains the same. My guess is that it will be a few years until that buffer is gone.
There has never been any proof or anything from GM that they ARE using any of that 35% as the battery degrades. If you have seen that then please provide the links!
I have seen one non-GM presentation from a battery company owner that indicated some of the 35% is used for "thermal management power requirements".
DrI's watching of the SOC via the PID does not show any degradation.
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Dave an early Phoenix Volt owner watches his input to the the car and has not seen it changed. He has a solar system so watches kWs carefully.
From Rusty and DashDAQ
Here's how it maps between the gauge display and the actual battery SOC (or at least I think the VICM term is SOC).The ICE comes on around 20% SOC, and the CS SOC is around 22%. So the ICE runs a bit to bring the SOC back up from 20%ish to 22%ish. This somewhat confirms some of what we've heard about the battery and battery SOC.Code: Select all
Battery Gauge Gauge % Battery % 10 bars 91%-100% 81.0%-86.5% 9 bars 81%-90% 74.4%-81.0% 8 bars 71%-80% 68.0%-74.4% 7 bars 61%-70% 61.5%-68.0% 6 bars 51%-60% 55.3%-61.5% 5 bars 41%-50% 48.7%-55.2% 4 bars 31%-40% 42.1%-48.7% 3 bars 21%-30% 35.6%-42.1% 2 bars 11%-20% 29.3%-35.5% 1 bar 1%-10% 22.7%-29.3% 0 bars 0%-1% 20.0%-22.7%