Cattle Rancher Goes Solar
|Member Name:||Bill Purcell|
|Project Title:||Residential Ground Mount System|
|City & State:||Danville, CA|
|Rated DC Output:||21.8 kW|
|Rated AC Output:||18.4 kW|
|Modules:||128 ET Solar ET-M572170’s (170 Watts each)|
|Inverters:||1 SMA SB6000US (6,000 Watts) & 1 SMA SB7000US (7,000 Watts)|
|Monitoring:||SMA web box|
|Total installed cost:||$130,000|
|Net Cost per Watt:||$3.46 AC, $2.92 DC|
|Date of Installation:||August, 2009|
|Installer:||Pacific Solar Energy|
To help offset the electrical load of this member’s small cattle ranch, a solar array was installed on a southwest facing hill, surrounded by barbed-wire to keep the cows out.
The customer owns a large tract of land and had a sizable electric bill which he wanted to reduce to near-zero at the lowest possible cost. The only option was a ground array. A suitable southwest facing, un-shaded site with a 15 degree slope was available, but unfortunately the site was about 900 feet from the main house and electric interconnection point. This long distance required digging a trench 18” deep, laying 3” conduit, pulling in the conductors, and installing a water line to facilitate panel cleaning. At the system site, two arrays were constructed with disconnect switches located beneath the panels, all enclosed by a barbed-wire cattle fence. The three inverters and web box monitoring system are located in an out-building mid-way between the array and main house, which saved some money on cable costs.