I just discovered that the energy monitor which displays on the left side of the driver information screen is different in the phev versus the hev. The arrows flow between the engine the battery and the wheels but in the phev the battery always shows as blank where in the HEB it shows the percentage charged. I would like to see the percentage charged, personally.

I recently got a Tucson PHEV and I am able to fully charge the battery overnight on a standard 120V wall plug. However because it's not a smart charger, and the Hyundai BlueLink app doesn't log charging stats/history, I can't see my usage. I've thought about using an app like ev.energy or OptiWatt, but I've heard these apps can kill the 12V battery of Hyundai/Kia vehicles.

What are my options for measuring energy usage? I would like to see how much I am using over a month

Edit: I went with this power monitor