GregH
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Re: Official Southern California Edison thread

Mon May 01, 2017 8:12 am

As of yesterday the California ISO had curtailed (shut down) 242.9GWh of renewable power this year, mostly solar, due to over-generation.

I figure that's almost a billion EV miles.
'17 blue Volt Premier w/ACC
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'11 SL blue Leaf
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abasile
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Re: Official Southern California Edison thread

Mon May 01, 2017 9:51 am

GregH wrote:As of yesterday the California ISO had curtailed (shut down) 242.9GWh of renewable power this year, mostly solar, due to over-generation.

I figure that's almost a billion EV miles.

If correct, that's closer to a trillion EV miles with an efficient EV... Are you sure that figure isn't in MWh? EDIT: GregH is correct - one billion EV miles

SGIP (California's "Self Generation Incentive Program") is a nice try, and it will help stimulate the market for battery-based storage to soak up a small fraction of "off peak" PV generation. However, a longer term solution would be to institute electric rates that are market based in real time, as an alternative to today's fixed TOU periods and rate schedules. That would send the necessary market signals to shift consumption (and battery charging) to periods when there's "excess" renewable generation. This wouldn't be as sweet a deal for consumers as NEM 1.0, of course, but ultimately we'll need a more sustainable plan for adding renewables to the grid.
Last edited by abasile on Tue May 02, 2017 8:40 pm, edited 1 time in total.
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LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
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GregH
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Re: Official Southern California Edison thread

Mon May 01, 2017 3:41 pm

Up to 247,913MWh including yesterday.
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GRA
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Re: Official Southern California Edison thread

Mon May 01, 2017 4:43 pm

[*]
GregH wrote:Up to 247,913MWh including yesterday.

So, to answer abasile's question, add three zeros to convert MWh to kWh, then multiply by say 4mi./kWh gives about a billion miles.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

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abasile
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Re: Official Southern California Edison thread

Mon May 01, 2017 7:55 pm

GRA wrote:So, to answer abasile's question, add three zeros to convert MWh to kWh, then multiply by say 4mi./kWh gives about a billion miles.

Sorry for the mistake, GregH, "GWh" was correct! 250GWh * 1000000kWh/GWh * 4mi/kWh = 1 billion miles

:oops:

I was making the mistake of converting to Wh (instead of kWh) and then multiplying by 4...

The "Tesla way" of expressing efficiency in terms of Wh/mile isn't bad. Keeps the units slightly simpler. ;)
2011 LEAF at 69K miles, pre-owned 2012 Tesla S 85 at 89K miles
LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
Tesla battery: 250+ miles of range (-5% vs. new)

GregH
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Re: Official Southern California Edison thread

Tue May 02, 2017 11:34 am

No worries, I had to run the numbers a few times just for sanity. The scale is daunting.

My new Volt shows total daily kWh and mileage and I find myself constantly converting to mi/kWh in my head as that's what I'm used to from the Leaf. But yeah back in the old days (EV1) we always talked in terms of Wh/mi.
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abasile
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Re: Official Southern California Edison thread

Thu May 04, 2017 2:07 pm

abasile wrote:I have 360W (DC) panels with micro-inverters that max out at 320W (AC). I've noticed that some of the panels are now reaching the maximum 320W by roughly 10:30am, well before solar noon (~ 1pm). Even in mid March, I was seeing panels reach the max of 320W. This makes me wonder if perhaps the micro-inverters are a bit under-sized.

I'm now thinking that perhaps our micro-inverters (and inverters in other systems) may have been sized with the expectation of somewhat warm panel temperatures during the months with maximum sunshine. However, our moderate latitude, elevated mountain location (about 1870m above MSL, 34 degrees North) often gives us access to exceptionally intense solar radiation relative to our temperatures. (I was counting on this to offset at least a fraction of the production that we're "losing" to shading.)

This week, our PV production is noticeably lower than last week, roughly 7% less energy per day. We're no longer hitting the max of 320W at each micro inverter. The only significant factor seems to be the temperature and wind. Last week, our daytime highs were in the ballpark of 10C, with somewhat high winds that undoubtedly helped keep the panels quite cool. This week, we are seeing highs in the range of 20-25C, with little wind. So the panels are certainly getting quite a bit warmer, and thus producing less. As a result, the micro inverters don't appear to be "clipping" our output.

By the way, our SGIP application for the Powerwall 2 was conditionally approved for "Step 1", the largest possible rebate amount. :D So we are looking forward to installation in June, or perhaps later if Tesla ends up further behind schedule on Powerwall deliveries.
2011 LEAF at 69K miles, pre-owned 2012 Tesla S 85 at 89K miles
LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
Tesla battery: 250+ miles of range (-5% vs. new)

GregH
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Re: Official Southern California Edison thread

Sat May 06, 2017 4:08 pm

abasile wrote:By the way, our SGIP application for the Powerwall 2 was conditionally approved for "Step 1", the largest possible rebate amount. :D So we are looking forward to installation in June, or perhaps later if Tesla ends up further behind schedule on Powerwall deliveries.


Cool! Congrats.
I've heard the PW2 cannot export to the grid.

Does anyone know if this is a software issue like Schneider SW inverters that monitor AC in and add current to cover (but not exceed) loads? Or like Magnum which actually switch out the grid and run the loads on inverter alone? I'm still trying to understand why the Schneider SW series seems to be software limited whereas their higher end XW 5.5 and 6.8kW inverters can export.
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Boomer23
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Re: Official Southern California Edison thread

Wed May 17, 2017 10:41 pm

Pardon me if this is repeat information on this recently very active thread.

I just learned of a new EV rebate program that is being offered by SCE, and also one that SDG&E offers.

I've known for some months that PG&E offers a rebate of $500 to EV owners in their service region. I just heard this evening that SCE has a new program called Clean Fuel Rewards program. This program offers $450 for each EV that you own or lease.
SDG&E also offers a rebate program, which I think offers $50 per year to EV owners.

I applied this evening to SCE for rebates for our two EVs.

Here are the links to the programs at the two So Cal public utilities.


https://www.scecleanfuel.com/

https://www.sdge.com/clean-energy/elect ... ate-credit
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Valdemar
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Re: Official Southern California Edison thread

Thu May 18, 2017 1:11 am

Sweet. I can surely find use for the extra $450. Thanks!
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