PV grid-tie output (Was PV roofing material) [RE-wrenches]

Wed Aug 21 15:53:22 PDT 2002

8.54 kWh/day / 2.24 kW array = 3.81 average daily sun hours for an 1 full
year of data. That's a pretty interesting number (I think).  How does that
compare to Santa Fe's published annual average?  All I can find right now is
the map of the US that shows you in the 6 hr annual average. Assuming your
annual average is 6 hours (and the site is in full sun all day long) that
comes up to a net system efficiency of 63%.

Comments?

Travis Creswell
Ozark Energy Services
----------
>From: Allan Sindelar <allan at positiveenergysolar.com>
>To: RE-wrenches at topica.com
>Subject: Re: PV grid-tie output (Was PV roofing material) [RE-wrenches]
>Date: Wed, Aug 21, 2002, 1:26 PM
>

>Here are some numbers to toss into the output stew:
>Our first batteryless system used 32 BP70s on two GC-1000s on a roof in
>Santa Fe. We installed a Hialeah kWhr meter on the AC output. Between
>11/12/01 and 8/1/02, we fed back an average of 8.54 kWhr/day from 2,240
>rated watts of PV. One of the four subarrays was on a section of roof that
>is partially shaded during winter months.
>The GC-1000s have to date performed flawlessly, and the client is satisfied.
>Allan at Positive Energy
>
>> Does the system have a kWh meter on the output of the inverter? That is
>> really necessary to quantify energy production.
>> Bill.
>

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