Performance matters [RE-wrenches]

John Hardwick HardwicJ at sharpsec.com
Tue Mar 30 11:33:38 PST 2004


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Marco, 
I think I need to see those systems firsthand,
maybe they'll fly me to Hawai'i .... doubt it, so...

can you provide the efficiencies for your SB2500 installations also?

Thanks,
John

-----Original Message-----
From: Marco Mangelsdorf [mailto:marco at pvthawaii.com]
Sent: Tuesday, March 30, 2004 11:20 AM
To: RE-wrenches at topica.com
Subject: Performance matters [RE-wrenches]


>From Antony: "Is he the only one who has collected data, or is there no
interest in real world performance?"

I have several systems' worth of performance data.

* Waikoloa, sunny side of the Big Island of Hawai'i
3 kW STC array with SB2500
12.93 kWhs/day average after two years of operation

* Kailua-Kona, sunny side of Big Island
3 kW STC array with SB2500
11.7 kWhs/day average after one year

* Kawaihae, very sunny side of the Big Island
7.2 kW STC array with two Xantrex SW4048s (w/battery back-up)
25.77 DC kWhs/day average after two years
22.54 AC kWhs/day average = 87.5 percent DC-AC efficiency

* Kahului, Maui
32.4 kW STC array with Xantrex PV45208
132.3 kWhs/day average after .79 years

marco
ProVision

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