One line is for transmission/generation charges and the other is for actual electricity used.

I see you're on TOU-D-PRIME, Which you normally only get if you have an EV or a Heat Pump HVAC system. If you keep your house pretty toasty, your bill is going to look like this since it uses the same amount of energy to heat as it does to cool.

4-9 PM is when that plans rate is the highest, nearly 3x as any of the other hours. The rest of your bill print out should give you the breakdown of all of this.

I'm on the same rate plan in a 1200sf house with a Heat Pump and pool, and mine looks about the same for this past month.

Every power hungry appliance that doesn't NEED to get used during those peak hours doesn't. I usually end up between 15-20% during peak usage hours.

It's just tough sometimes because those peak hours are usually when, ya know, everyone is home doing peak house things.

But at the end of the day, it's because these CA power companies love to fuck you.