I emailed Brad Heavner, the policy director at CALSEIA, today and got this response in part (I omitted his expression of exasperation):
" . . . PG&E’s storage interconnection manager, Bennett Chabot, was on a panel with me two weeks ago and he assured people that PG&E staff should be up to speed by now. He pointed people to the EGI webpage at http://www.pge.com/en/b2b/energytransmissionstorage/egi/grid/index.page. He also encouraged people to email [email protected] if they have problems. They are required to respond to inquiries within a week. " I followed the link and spent a fruitless half hour on PG&E's website, including using the search bar and every search term I could think of. I found nothing about NEM with storage. Maybe someone else has better search skills than me. So I emailed the rule21 folks. Possibly someone who knows something will contact me within a week. Bruce Erickson Mendocino Solar Service PO Box 1252 Mendocino, CA 95460 707-937-1701 707-937-1741 fax [email protected] Celebrating 20 Years in Solar! 1994-2014 On Jul 2, 2014, at 5:46 PM, Christopher Warfel wrote: > I think so. Bruce's post indicated that 10kW seemed incorrect. So assuming a > 10 kW inverter exporting for the onpeak period over an unknown assumed number > of days assuming no recharge from the utility? I know this has a lot of > different ways of being looked at, which is why the atakeholders need to look > at this. At this point, it seems like the optimal solution is complicated > from a metering and accounting perspective. They don't want off peak > consumption being used to sell on peak. Starting from there, how do they > acheive this from an implementable policy perspective? > > > ------- Original Message ------- On 7/3/2014 12:28 AM wrote: > " In any case, a 10 kW battery system, will probably exceed most grid > connected battery systems, and the whole issue is moot. " > > shouldnt battery capacity be in kWh? > > > todd > > > < /p> > > > > On Wednesday, July 2, 2014 5:00pm, "Christopher Warfel" said: > > I am not familiar with PGE's time of use rates for residential. I have to > assume that they do have TOU built into their metering. Buying at any time is > predicated by the load of the facility, including battery load, so this is > probably their concern. Given the costs of batteries it seems uneconomical to > buy batteries just to store energy to sell on peak, but I don't have your > peak vs off peak tariff. We have been putting in two meters on our systems, > but to make it work properly for determining actual PV generation we had to > put a detent in the meter on the back up panel circuit. Now the only way I > think that this can be done by utility type meters is to buy a programmable > meter and have it record input and output similar to how the utility meter > operates. > > If they will accept a DAS system (and some are now compliant with uti lity > accuracy requirements, place a product such as EGauge on the battery back up > circuit. If you are exporting at a time with n o or little solar input, then > they know you are using your batteries to generate revenues. This could > required a insolation meter, and all of this will get expensive and > complicated quickly. It seems that PV can be used for grid support by > exporting and PGE or whomever should encourage on peak selling back to them. > They could set a price for exported power below tariff, but still acceptable > to the owner, and they would find that the solar exported power on peak is > below their marginal cost for electricity. > > I know I have complicated this, but this is really what an industry group, > the commission and the utility should work out. In any case, a 10 kW battery > system, will probably exceed most grid connected battery systems, and the > whole issue is moot. > > > > > Sent from Finest Planet WebMail. > > Christopher Warfel, ENTECH Engineering, Inc. PO Box 871, Block Island, RI > 02807, 401-466-8978 (v)(f) _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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