[Oeva-list] my first solar year with Leaf EV, solar PV, and TOU
ericc at xenopi.com
Tue Apr 16 16:22:40 PDT 2013
Your word of caution is duly noted, Charles. To be honest, our utility
bills are so low (because of our PV & solar hot water, and all the
efficiency gains we've put in place over the years) that even if our
bill goes up, it's no big deal. If, after a year, we find that we're
paying more, then we'll just switch back.
On 4/16/2013 3:55 PM, charlesbonville at comcast.net wrote:
> Eric and all,
> Be cautious in moving to TOU rate. The power company generally
> advises that it only works well for people that are not on a normal
> schedule, such as households with workers that work a swing shift from
> 3 PM to 11 PM. In those households, they are generally not at home or
> are still asleep during the Peak rate hours.
> That said, the larger your PV array, the more likely you are to avoid
> using the grid during Peak hours, which tend to coincide, not
> surprisingly, with most homes' highest daily electricity consumption
> hours. A 5 to 9.5 KW system has a higher probability of benefiting
> from TOU than a system 4K or less.
> Here's my gut feeling: If your PV system is not putting at least 1/2
> of it's generation into the grid, you are not going to offset enough
> peak usage to benefit from TOU. The winter months could get expensive
> on TOU unless you make radical changes in your use patterns to
> minimize use during Peak rate.
> I can't claim to be an expert on this, but I have done some ballpark
> calculations and was left with the above impressions.
> One other note: I have the impression, possibly mistaken, that
> Pacific Power requires Net Metering for grid-tied PV systems, but does
> not offer TOU with Net Metering. Perhaps this is only true if the PV
> system is a Feed-In Tariff participant? I'd love some clarification
> on this if anyone on this list knows.
> Lastly, thanks for the numbers, Gary. I'd love to see the spreadsheet
> you used to calculate it all.
> *From: *"Eric Cha" <ericc at xenopi.com>
> *To: *"Gary Graunke" <gary at whitecape.org>
> *Cc: *Oeva-list at oeva.org
> *Sent: *Tuesday, April 16, 2013 3:34:46 PM
> *Subject: *Re: [Oeva-list] my first solar year with Leaf EV, solar PV,
> and TOU
> Hey Gary,
> Thanks for sharing that info. I've had a grid-tied 4kw PV system(and a
> Solar Hot water system which is tied in with our nat gas water heater)
> for about 7 years now, and we just leased a Leaf last November. For all
> that time, we've been using basic (flat) rate billing. After reading
> your report, I decided to switch over to TOU rates as well and just did
> so. (Portland General Electric makes it very easy to do online). We'll
> see how it goes!
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Oeva-list