Looking for a way to read out Battery and PowerAdapter Information via ioreg

I'm trying to collect information on power usage of our Apple (for now macOS only) devices. I came across some good posts and was already able to read out the

object via

. That already would help me to determine if it is a laptop or a desktop model. But is is actually pretty hard to get more detailed information around the actual power drain. I'm less interested if a device runs on battery but actually more on the consumption if it is connected to a charger. I found the child object of

which contains a lot of interesting information but have no real clue how to interpret the data (reformatted for better readability).

$ /usr/sbin/ioreg -rc AppleSmartBattery | grep PowerTelemetryData
      "PowerTelemetryData" = {
         "WallEnergyEstimate"=2305,
         "AccumulatedSystemPowerIn"=28547763,
         "AdapterEfficiencyLossAccum ulatorCount"=3586,
         "AccumulatedWallEnergyEstimate"=9196925,
         "SystemInputVoltage"=12145,
         "SystemPowerInAccumulatorCount"=3586,
         "SystemEnergyConsumed"=1987,
         "SystemPowerIn"=7156,
         "SystemLoad"=7576,
         "PowerTelemetryErrorCount"=0,
         "AccumulatedSystemLoad"=28544320,
         "SystemLoadAccumulatorCount"=3587,
         "AccumulatedSystemEnergyConsumed"=7928273,
         "AdapterEfficiencyLoss"=318,
         "SystemInputCurrent"=588,
         "AccumulatedAdapterEfficiencyLoss"=1268652
   }

From what I can see there is already some items which are pretty interesting, e.g. WallEnergyEstimate, AccumulatedWallEnergyEstimate or SystemEnergyConsumed. But have no clue in what unit of measure these read outs actually are and couldn't find any (even non-official) documentation. Is there anyone that can help?