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Charging info from the Blazer EV Owners Manual

15K views 16 replies 10 participants last post by  Steverino  
#1 ·
Last night I decided to check the charging information for the Blazer EV. Below is a short list of what I found:
  • GM recommends not charging to more than 80% or letting the battery SOC go below 20%. So on a 300 mile EV, this translates to 180 miles of usable daily range. The manual does say to go ahead and fully charge if you need to for a road trip. There's a setting ior maximum charge n the infotainment system for max charge.
  • Regenerative braking is less effective above 80% SOC
  • Leave the vehicle plugged in during extreme cold (freezing) or hot (>100F) temperatures. The vehicle will pull power from the charger to maintain the battery.
  • Cabin preconditioning will pull from the charger if plugged in
  • "Home location" delayed charging settings the owner can set (I assume the home location is set in the mapping system)
    • Estimated departure time - starts charging when needed
    • Peak power pricing - avoids charging during user defined peak cost periods
    • For those who have "smart" electric grids, the Blazer EV will not charge during utility signalled high load periods.
  • All charging defaults can be overridden on a charge session by charge session basis
One thing I did note and I think is a misprint in the owners manual. Maximum AC power is 240 volts 40 amps. This is only a 7.68 KW EVSE and we know the Equinox and other Ultium vehicles support 60 amps (11.52 KW, 48 amp draw) AC charging.

It wouldn't surprise me to see the same exact information in the Equinox EV's manual, since a lot of the underlying hardware and software is identical.
 
Discussion starter · #5 ·
Could the "Maximum AC power is 240 volts 40 amps" be referring to charging with the included cordset? Because it plugs into a NEMA 14-50 receptacle, it is limited to 40 amps (80% of the receptacle capacity).
Hadn't thought of that. This is very possible but I never found a reference to the 11.5KW charging on AC either.
 
Discussion starter · #7 ·
Discussion starter · #8 ·
I just pulled the owners manual down to review it in Adobe Acrobat vs. my web browser. One of the really nice things about the Volt is you can tell it to NOT charge during peak electrical price hours. It appears the Blazer will attempt to honor this request but if it can't get to the desired setting it will charge during those hours. What I can't tell is if the target setting for those sessions overrides the overall target charge limit or if it will only charge during peak hours if it needs to to reach your daily charge amount but then charge during off-peak to the overall maximum charge setting.