TOU for SCE in Southern California analysis

[josefontao]

I havent read the 15 pages of this thread and maybe someone already posted this link. If not, it might be worth taking a look.

http://www.kglad.com/Files/forums/sce.html

You can feed the data from SCE's green button for an entire year and the site will give you a breakdown of how much you can expect to pay on the various TOU and the tiered plan.
It also takes into account an EV vehicle if you plan to purchase one in the near future.

I'm not sure that the TOU-D-T results are accurate, at least in my case, but the other plans were right on the money.

The results look somehting like this:
Monthly Mileage = 1000 miles :: Wh/mile = 276
With the 4-tier plan, production and car: your electricity cost is: $342.59
With the TOU-D-A plan, production and car: you consumed more energy than you produced but you will owe SCE $0.00
With the TOU-D-B plan, production and car: your electricity cost is: $198.86
With the TOU-D-T plan, production and car: you consumed more energy than you produced but you will owe SCE $0.00
Electricity cost for car only under TOU-EV-1 plan (requires 2 meters): $33.24

[Ward L]

How can I get a copy of the spreadsheet with SCE tariff schedules to calculate the best schedule for me? I've looked around and see where members are using it and would like to try it out. Thank you in advance.

[silversaver]

So I've been playing around with the spreadsheet and it's amazing how good the TOU-A rate is if you use power during super off-peak. I put in my expected generation and history from last year along with a scenario of charging an EV at night (~20kWh per day). Domestic would cost me $1080 a year, TOU B&T are about the same at $750 a year. TOU-A I would still have a credit of $100!

Is it too good to be true (or maybe I screwed up the sheet....)?

check my last bill. I'm a net user withdraw 3100kWh from SCE but still with over -$500 in my account.

[FFE]

Is it too good to be true (or maybe I screwed up the sheet....)?

It seems like a great plan for all solar homeowners. My system is sized so that my peak and off peak credit more than offsets dollar wise my Super off peak use this time of year. I could buy a much smaller system due to this plan. I generate less than half of the kWh I use right now but still generate approximately $1 a day in credit. I will use that credit I am building up in summer but plan to get a net $0. Without TOU-A I would need at least twice the system (twice the installed cost too) to cover all of my bill. My situation is a little different than most since we have a full electric car and a plug in hybrid that uses quite a bit of Super off peak power.

[tweekzilla]

So I've been playing around with the spreadsheet and it's amazing how good the TOU-A rate is if you use power during super off-peak. I put in my expected generation and history from last year along with a scenario of charging an EV at night (~20kWh per day). Domestic would cost me $1080 a year, TOU B&T are about the same at $750 a year. TOU-A I would still have a credit of $100!

Is it too good to be true (or maybe I screwed up the sheet....)?

[tweekzilla]

the negative credit will be reset to $0 at end of relevant period (12 months) and your starting a new period.

Thanks - So you never have to actually **pay** money to SCE if you are a net producer? My neighbor seemed to think that you did which didn't make sense to me. I guess if you are a net producer then it does not matter what tariff you are on except for the monthly charge.

[silversaver]

I'm still confused a little by the negative credit if you produce more than you use. Do you actually have to pay this money to SCE or does it just offset any possible credit you may already have received that year if you use more than you produce?

the negative credit will be reset to $0 at end of relevant period (12 months) and your starting a new period.

[tweekzilla]

I'm still confused a little by the negative credit if you produce more than you use. Do you actually have to pay this money to SCE or does it just offset any possible credit you may already have received that year if you use more than you produce?

[silversaver]

I'm in 11 month of relevant period. Looks like I'll be drawing about 4000kWh from SCE before end of relevant period on Dec 12, 2015. If I stay in standard tier rate, my bill will be pretty high. The TOU has really making my solar worth of the money + 2 EVs 26000 total annual miles.

[sensij]

The SCE min charge is filled on Sept 1st and effective on Oct 1st of 2015. The actual charge might/will show up on any billing cycle start after Oct 1st. So far my recent bill closed on Oct 13th doesn't show any min charge so I will assume the charge will show on next bill.

FWIW, in SDG&E land, the tariff takes effect on the day it is filed. My Sept. statement showed a $8.92 min charge, consistent with a 30 day billing period that had 6 days in August @ $0.17 / day + 24 days in September @ $0.329 / day.

[silversaver]

SCE new rates effective 10/01/2015

https://www.sce.com/wps/portal/home/residential/rates/residential-plan/!ut/p/b1/jZDdTsMwDEafqLXbwlIuM7R2qTZK6cRKblAGaRYpS6osohJPTybtCokf31k6_nxs4DAAt-JDKxG0s8Jcer54zcqarlmPrH68vUHWkB0S0mdlRSLwEgH8oSj-Nd_8Y0Hut_dbBXwS4ZhoOzoYvDzrd2mDFiaZjLCwB_4t6YnkMel5tWmXWY5lfgXualytmzYCu65AVnT40FNaIC6uwC-3RFll3CH-Zb8E3loaqu4iSO2hKKOgl6P00qdHdw4wzPOcKueUkembO8F0Gj43Y88SXqkvX-jcpA!!/dl4/d5/L2dBISEvZ0FBIS9nQSEh/

[silversaver]

The SCE min charge is filled on Sept 1st and effective on Oct 1st of 2015. The actual charge might/will show up on any billing cycle start after Oct 1st. So far my recent bill closed on Oct 13th doesn't show any min charge so I will assume the charge will show on next bill.

[silversaver]

The TOU-D-A so far so good that really benefits the solar arrays facing from South to West. I have consume 2000+kWh with withdraw 1000kWh from SCE after solar production, the bill aint so bad after all.

[sensij]

I was implying that we don't know the future TOU rates. As one extreme example if everyone installs solar the super-off peak may actually shift to daytime

OK, but as long as we know some baseline quantity of energy is less expensive than the rest, there will always be a case that sizing less than 100% is more cost effective. A baseline system is the currently favored system for developing rates, whether straight tiered or TOU, and that doesn't appear to be changing in the foreseeable future.

[sensij]

The map lists regions (eg 10,12,16). Do these numbers directly correspond to the baseline in kWH?

You can use those region codes to look up the baseline allocation in this document. For example, region 10 has a summer baseline of 15.5 kWh per day, and 11.0 kWh / day in winter.