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DeaneG
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Location: Cupertino, CA

Re: Official California PG&E Thread

Tue Dec 07, 2010 7:38 pm

My PG&E project manager came over today to inspect my panel and power feed for EV charging. He mentioned that E9 rates are now officially "optional" rather than mandatory for EV charging.

He also said that most solar PV+EV customers should benefit from using the E6 rate, rather than E9A. Other than the 1-hour "peak time" difference, E9A's peak rates are very close to E6, but E9A off-peak rates are much lower. So I'm going to stick with E9A (an uphill battle so far). My solar panels are tilted west rather than south, so I'll have better summer afternoon sunlight collection (what I need with humming air conditioners) but reduced winter and morning power.
White SL w/L3, 3kWDC Solar PV

leaf561
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Leaf Number: 5449
Location: Bay Area, CA

Re: Official California PG&E Thread

Tue Dec 07, 2010 8:54 pm

DeaneG wrote: Other than the 1-hour "peak time" difference, E9A's peak rates are very close to E6, but E9A off-peak rates are much lower.
Off peak Tier 2 and Tier 3 (onwards) are more expensive for E6 (compared to E9a). E9a would be better choice compared to E6. E9b + E6 might be good in the long run.
Solar PV 3.9 kW/h system
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SF Bay Area EV Project - Blink Installed 06/20/11
Reserved: Apr 23, 2010. Ordered: Nov 30th, 2011. Delivery: July 01, 2011

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DeaneG
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Re: Official California PG&E Thread

Tue Dec 07, 2010 10:15 pm

leaf561 wrote:Off peak Tier 2 and Tier 3 (onwards) are more expensive for E6 (compared to E9a). E9a would be better choice compared to E6. E9b + E6 might be good in the long run.
So I'm wondering why the standard recommendation by PG&E personnel is E6 over E9A? Of course, it does mean more revenue for PG&E!
White SL w/L3, 3kWDC Solar PV

leaf561
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Re: Official California PG&E Thread

Tue Dec 07, 2010 11:03 pm

DeaneG wrote: So I'm wondering why the standard recommendation by PG&E personnel is E6 over E9A? Of course, it does mean more revenue for PG&E!
I don't think it is deliberate. It is just lack of knowledge or clarity on their part. I was even told by one PG&E person that E9a meter doesn't support spin back. I guess, it is not true, since you have E9a with solar.

Regarding which plan to go for, I would say, it all depends upon your usage pattern. Initially, those going from E1 to E9 will see a big shock during peak period, because of the $0.31 rate (from E1 $0.11). But eventually they will get used to it and start doing their laundries during weekends :D Those with solar, it plays in their advantage, because PG&E pays $0.31 for what you generate during peak hour, and you will be paying around $0.054 to $0.10 during night time.
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planet4ever
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Re: Official California PG&E Thread

Wed Dec 08, 2010 2:00 am

As we all know, most of California, except the portion from Lake Tahoe north, is set at an angle. Like many places in the state, the streets in our community were laid out parallel and perpendicular to the railroad, and the railroad runs parallel with the valley. "South" is really South by Southeast, and that's the direction my solar panels face.

This obviously means my panels work better in the morning than the afternoon. That, in turn, means a significant penalty for the one-hour shift in peak time between E6 and E9.

Yes, the 3 cents/kWh savings of E9 over E6, midnight to 7 AM, is very tempting and if I intended to put lots of miles on my LEAF it would probably outweigh the one hour delay in E9 peak time. But I only drive about 7K miles/year, so I'm planning to stay on E6.

Besides, E6 off-peak is 13 hours on summer weekday nights, 21 hours on winter weekday nights, while E9 off-peak on weekday nights is only 7 hours year round. Since I am driving low mileage, I plan to use L1 charging only, and 7 hours may not be enough on some nights.

Like they say, YMMV.
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leaf561
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Re: Official California PG&E Thread

Wed Dec 08, 2010 9:40 am

planet4ever wrote: This obviously means my panels work better in the morning than the afternoon.
Doesn't the morning fog affect you? I was also under the impression that to get full credit from CA, you need to be facing South West with a certain angle and some % of sunlight everyday...
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DaveEV
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Re: Official California PG&E Thread

Wed Dec 08, 2010 12:15 pm

leaf561 wrote:Doesn't the morning fog affect you? I was also under the impression that to get full credit from CA, you need to be facing South West with a certain angle and some % of sunlight everyday...
You can play with PVwatts to see how much angle will affect you based on your location.

If you are near the coast, then yes, in general turning the panels a bit towards the west will increase output, but it's not significant - perhaps 5-10% degrees west from south will increase annual output by a few percent in my area at least.

greenleaf
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Re: Official California PG&E Thread

Wed Dec 08, 2010 12:21 pm

I plan to stick with E1. My PV array is only sized to eliminate tier 3 and higher.
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cinmar
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Location: Stockton, CA

Re: Official California PG&E Thread

Wed Dec 08, 2010 12:50 pm

greenleaf wrote:I plan to stick with E1. My PV array is only sized to eliminate tier 3 and higher.
I'm in the same boat. We use too much power during peak hours to change from E1, and our PV panels will only keep out of top tiers.
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jjohncm
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Re: Official California PG&E Thread

Thu Dec 09, 2010 9:43 am

I just got off the phone with PG&E Clean Air people. I was told that recent developments meant I could keep my E7 tariff and charge my Leaf through my current TOU meter the person told me this after checking with two supervisors. Which is good news considering I was quoted $7K to install a second meter for E9B and can now go with the original Aerovironment quote of $2K including charger, hopefully installed to get the tax break before January 1st.

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