There is a better way to determine AC energy
The kW power flow meter on the speedo panel is not much use for determining HVAC usage since it rounds to nearest kW. Other better ways:
1) Note the total kWh used since last charge on the energy info screen. Note also the percent attributed to HVAC. Use the average speed and miles driven since last charge info as follows:
Example - today, after charging overnight, I drove 100 miles and used 22 kWH. 10% energy went into HVAC, and my average speed was 25 mph. 10% of 22 kWh is 2.2 kWh. 100 miles at 25 mph works out to 4 hours. 2.2 kWh HVAC / 4 hours works out to HVAC using 550 Watts.
2) (This method works only at rest): Select info screen showing kWh used. It increments every 1/10 kWh. Sit in car, make calls, surf internet, read a Kindle, or nap...whatever. Note how often kWh used increments. I had a situation where a colleague ran late and I killed 30 minutes in a parking lot. The kWh meter incremented 0.1 kWh about every 10 minutes. That works out to 0.6kWh / hour or 600 Watts.
Finally, be aware that HVAC energy usage is not a fixed figure - it highly depends on outdoor temperature sunshine and "indoor" setpoint and fan speed. As outdoor temp rises the car needs more AC to maintain a given cabin temperature, and, at the same time, the refrigeration system works harder to reject cabin heat into the ambient air. More technically speaking, as outdoor temps rise, compressor refrigerant discharge pressure rises, system capacity falls, and compressor power rises to overcome the increase in discharge pressure.
I'm both an engineer and HVAC contractor, so I could bang on a bit more, but I hope y'all get the idea from the brief outline above.
One last point - I haven't actually examined my Bolt's HVAC system (it works well, so no need to mess with it), but I expect that it works better while moving than sitting still since movement almost certainly increases air flow across the condensing coil, improving efficiency.
Oh yeah - most of the foregoing doesn't apply to heating mode (other than measurement tips). Bolt heat comes from a purely resistive system...Btuh out = Watts in times 3.413. Perhaps future Bolt models will incorporate a heat pump for more efficient heating compared to resistance, but since I live in Florida, I don't much care...