After getting electric cars and installed solar for two years, I am thoroughly confused by the SCE's TOU plan. I think this was done on purpose by SCE. Not sure anyone share my experience?
I am on TOU-D-A-SDP plan, basically the electric rate has 3 ties based on the time of the day the electricity was consumed and generated. The promise or the concept of the TOU for solar customer is that you are generating electricity at peak rate and consume mostly during the evening for vehicle charging. But the billing is totally different. Here is a typical SCE bill I got (couldn't attach the picture)
On peak: 46 KWh x 0.14912 = $6.86
Off peak: -142 KWh x 0.14912 = -$21.18
Super Off Peak: 357 KWh x 0.08650 = $30.88
DWR bond charge: 261 KHh x 0.00539 = $1.41
DWR Energy credit: 261 KHh x -0.00022 = -$0.06
On Peak: 46 KHw x 0.18110 = $8.33
Off Peak: -142 KHh x 0.12689 = -$18.02
Super off peak: 357 KHh x 0.04395 = $15.69
Base Line credit: 261 KHh x 0.09898 = -$25.83
Energy Charge Total: -$1.92
Above is fine, it seems conform to spirit of the TOU. I generated more electricity during off peak period, even tough it is smaller than I used during super off peak, but still be able to generate some credit in the end.
To problem is that this credit was accumulated months after months until you reached 12th's month, but you won't see a dime in the end mostly, it is just a credit on paper, and will be wiped out to zero after new 12-month period start. Here is where the SCE trickery coming into play: You have an "additional information regarding your NET Consumption / Generation:" section in your bill: For me, here is for above month:
. Your cumulative energy charge as of previous month: -562.43
. Your current month energy charge total: -$1.91
. Your cumulative energy charge year-to-date: -$564.35 (<--- You would be wrong if you think you will get this credit as a check at the end of year)
. Your cumulative KWh Year-to-Date: 20KHh
SCE doesn't look at the $-564.35 number, which takes into account TOU, when calculating the year-end bill. They look at the last number, 20KHh, and use this to calculate the year-end bill or credit. This 20KHz is just the net of generation and consumption, essentially NO TOU. Solar customer won't be credited accordingly this way. But at the same time, they charge much higher rate for peak time use for non-solar customer. This is very deceiving.