Update: Total Residential Electric Rates | San Diego Gas Electric (now includes 7/1/12 rate change) Latest "commodity cost", which corresponds the "generation" section of the bill: http://regarchive.sdge.com/tm2/pdf/ELEC_ELEC-SCHEDS_EECC.pdf Original post: Can anyone help me understand SDG&E's rates? EV-TOU: http://sdge.com/tm2/pdf/ELEC_ELEC-SCHEDS_EV-TOU.pdf EV-TOU-2: http://sdge.com/tm2/pdf/ELEC_ELEC-SCHEDS_EV-TOU-2.pdf And the normal residential rates for reference: http://sdge.com/tm2/pdf/ELEC_ELEC-SCHEDS_DR.pdf I believe the "UDC Total" column corresponds to delivery on the bill. What it's a total of is unclear, as it is certainly not the sum of the other columns. Now looking at the TOU rates, I see there is barely any difference for the "UDC Total" between different times of day, which is weird. I can only assume that the generation costs must be where the variance is, but where do I look those up? SDG&E also has this page with a little table to show EV-TOU rates: EV Rates | San Diego Gas Electric I can't figure out what those rates include (delivery? generation? taxes?), or whether those are up to date. Does anyone understand this stuff?