TOU metering report [RE-wrenches]

[Bill Brooks]

Allan,

That type of evaluation is fine for a spot check, but it leaves out several
very important factors that can cause the numbers to go the other way.
Safest bet in California is to stick with the tiered rate unless the
customer already has experience that their saving money with the TOU rate
without PV (as is obvious from your example).

The current tiered rate structure in California is extremely beneficial to
PV and makes it very difficult to justify the additional $277 for the meter
and additional $5 per month for the meter charge. Just a caution so that
installers don't take this analysis and run with it and end up with angry
customers.

Bill.


-----Original Message-----
From: Allan Sindelar [mailto:allan at positiveenergysolar.com]
Sent: Wednesday, June 26, 2002 12:20 PM
To: New wrenches posting
Subject: Fw: TOU metering report [RE-wrenches]


Wrenches,
    This report was posted to the SW-GTI forum that was mentioned here about
1-2 months ago. While it doesn't affect us in New Mexico (no TOU), I am
forwarding it to this group for those of us who can benefit.
Allan at Positive Energy

----- Original Message -----
From: "Chris Brock" <cbrock at cisco.com>
To: <TraceSWGTI at eCompute.org>
Sent: Wednesday, June 26, 2002 2:05 AM
Subject: TOU metering report


> This is not related to the GTI, however, I thought this might be of
> interest to report on how Time of Use billing is working out for me. I
> distilled a lot data; to make it easier to comprehend, I've tried to
> explain it in plain English:
>
>
> The PG&E summer rate schedule began May1:
>
> peak (M-F noon to 6PM only):     31.5 cents /kwhr
> off-peak:                                     8.5 cents /kwhr
>
> from May 1 to Jun 25:
>
> I consumed  88 peak + 633 off-peak, totaling 721 kwhrs
>
> I generated 427 peak + 492 off-peak, totaling 919 kwhrs
>
> Looking just at off-peak, I used 633 kwhrs, but generated only 492 kwhrs,
> so I had to buy 141 kwhrs from PGE, which cost me $12.41
>
> Looking at just peak, I used only 88 kwhrs, and generated 427 kwrhs,
> which, because of its superior value, the surplus of 339 kwhrs earned me
> $94.86 in credits
>
> Standard non-TOU metering is 12.5 cents per kwhr for the first tier. If I
> had been on standard metering, I would have earned a credit of $24.75 for
> the surplus of 198 kwhrs I put into PG&E's grid.
>
> Because of TOU metering, the time of day is taken into consideration for
> the value of the electricity I put into the grid:
>
> $94.86 -$12.41 = $82.45
>
> Bottom line: For me, TOU more than tripled (3.33 times) the value of the
> electricity I exchanged with the public grid.
>
> Chris
>
>

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