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Re: Official Southern California Edison thread

Posted: Tue Jan 23, 2018 1:41 am
by drees
JeremyW wrote:A cool document from the CAISO on updating the time of use periods can be found here.

SDG&E switched to basically these TOU periods in December. It's doubled the amount of money I now pay for electricity annually.

Definitely need to do more analysis if battery storage makes sense, but my initially calculations only made it marginal at best at current rates, but that probably means that it will be a no-brainer 5 years from now with the way rates are going.

Re: Official Southern California Edison thread

Posted: Tue Jan 23, 2018 8:21 am
by webeleafowners
We switched to a TOU program two months ago. Our bill is now a third of what it was. BUT...in the winter we live in our motorhome on our property in Palm Springs. At 8 o;clock we switch the coach to battery and let the inverters do the work. At 10 at night we switch it back. Went from a 115 dollar per month bill to 36. We have 800 watts of solar on the roof. Works well. Kinda like a power wall but not. 8 x 6 volt batteries.

Re: Official Southern California Edison thread

Posted: Tue Feb 13, 2018 9:33 am
by tbleakne
I was able to find a SCE Rate Comparison Tool mentioned by Boomer23 at breakfast last Saturday. It supposedly allows you to evaluate and compare several of the new and old TOU rates against your actual usage for the previous 12 months. Of course if you are contemplating adding solar or another EV, this evaluation will be flawed, but if your usage is stable, it should help a lot.

There are several paths on the web site to this tool. One is: home (residential) -> rates are changing -> learn more -> Residential Rate Plans -> Rate Comparison Tool.

I say "supposedly" because I could not run the tool. It requires a customer account of the form: 3-###-####-##. My customer account has the form: 2-##-###-####, so the tool rejects it. Is this because I am already on TOU-D-A ? I believe others on this thread also have TOU-D-A. Do you also have a 2-## account ?

I am overwhelmed with all the TOU choices, but some of them can be eliminated right away if you have solar, because they price daytime at Off-peak or Super Off peak (TOU-D-4-9PM, TOU-D-5-8PM).

Re: Official Southern California Edison thread

Posted: Thu Feb 15, 2018 1:06 pm
by Valdemar
When I was sizing my solar system I had to write a little program that could crunch my hourly usage data from SCE for the last 12 months against estimated solar hourly production for a year from the pvwatts estimator. I could plug-in different TOU schedules to get an idea how things would work out.

Re: Official Southern California Edison thread

Posted: Fri Feb 23, 2018 6:43 am
by Marktm
Valdemar wrote:When I was sizing my solar system I had to write a little program that could crunch my hourly usage data from SCE for the last 12 months against estimated solar hourly production for a year from the pvwatts estimator. I could plug-in different TOU schedules to get an idea how things would work out.


Interesting - in our area there is a provider that bills us based on 15 minute interval actual pricing (energy, not distribution) - for a monthly subscription price ($10). Did you download this type data and crunch it out off-line, or can you do this more or less real time by capturing data, say on an hourly/daily interval? What is astonishing is that some "peak" pricing is 10X "normal" and that "off peak" pricing can actually be a payment rather than a cost!

Also amazing is that so many in my area use copious amounts of energy (pools, kids with doors open/lights on, etc, etc). If they installed a well designed solar system with properly sized energy storage that is bi-directional (Pika Energy) with "smart" usage controls, they could pay back much of the system costs. Having an EV to charge early morning would enhance their savings - especially if they purchase a used Leaf (for next to nothing :) ). IMO, change is coming!

Re: Official Southern California Edison thread

Posted: Fri Feb 23, 2018 6:52 pm
by Valdemar
It was offline, downloaded 12 months usage history at X minute intervals in CSV format, the value X is escaping me at the moment but at least on an hourly basis if not more granular. Similar for pvwatts estimated production. There should be a software package out there that can do similar calculations, but I couldn't find anything at the time. It worked out pretty close to my prediction, I'm about 3,000kWh net consumer over 12 months and pay $0 not counting mandatory fees. The system is a tad larger than I could have gotten away with but that was a conscious decision. Of course this is only true until SCE changes the TOU rates which may send all my projections down the drain.

Re: Official Southern California Edison thread

Posted: Mon Feb 26, 2018 3:52 pm
by Marktm
That is a real worry - as more pure grid tied energy systems go on-line, any use of the grid as storage may not be cost effective. Battery storage can work around this issue - especially if I could get my Leaf to be the "storage" - may be coming.

Re: Official Southern California Edison thread

Posted: Tue Jul 10, 2018 8:51 pm
by tbleakne
This thread has been dormant since Feb 2018, but I have some news. Tonight, July 10, 2018, I sign on to my account at SCE.com to see how my usage is doing during this heat wave. I click on "View Usage" as usual, but this time I find a completely different graphical display for monthly and daily usage.

I click on Energy Use tab, then individual monthly bars to get daily usage, then day bars again to get hourly [for TOU]. All this looks nice, like SMA Sunnyboy solar production graphs, except negative usage (net production) is NOT shown.

Also, before they would show predicted net $ for the coming monthly period, using actual TOU pricing. Now they only show daily positive consumption in kWh for current billing period.

Has anyone else seen this (perhaps months ago) and talked to SCE ?

Re: Official Southern California Edison thread

Posted: Wed Jul 11, 2018 12:20 pm
by Valdemar
tbleakne wrote:This thread has been dormant since Feb 2018, but I have some news. Tonight, July 10, 2018, I sign on to my account at SCE.com to see how my usage is doing during this heat wave. I click on "View Usage" as usual, but this time I find a completely different graphical display for monthly and daily usage.

I click on Energy Use tab, then individual monthly bars to get daily usage, then day bars again to get hourly [for TOU]. All this looks nice, like SMA Sunnyboy solar production graphs, except negative usage (net production) is NOT shown.

Also, before they would show predicted net $ for the coming monthly period, using actual TOU pricing. Now they only show daily positive consumption in kWh for current billing period.

Has anyone else seen this (perhaps months ago) and talked to SCE ?


Thanks for sharing, just checked and this is a very disappointing interface for solar customers indeed.

Edit: looks like you can still get to the old display via "Go to your SCE My Account.." link above the new graph, but who knows if their plan is to fully retire it at some point.

Re: Official Southern California Edison thread

Posted: Wed Jul 11, 2018 10:32 pm
by smkettner
tbleakne wrote: except negative usage (net production) is NOT shown. ?


The SCE website is been under near constant update for over a year now on how data and functions are presented.
The updates go very slow during the day. Often with a glitch and new data is delayed for several days.

The net amount does show but not during the update process. I find before early morning (7a) or late evening (10p) is the most reliable time to log in. Yes during the day when the daily data updates are compiled the website often errors out or shows no solar credits. Everything does show correctly once the daily update is complete. Programming must be poor because the entire month gets re-updated every day so SCE is just churning monster data volume every day.

Check it now and should disply correctly.