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<p>Hey Folks, </p>
<p> I have an 18 ft X 36 ft"carport" type rack that
currently has regular PVs installed, close to due south, tilt at
20 degrees. The lower south edge of the array is 18 ft off the
ground as the upper edge of the array abuts the upper of the roof
of the 3-car roll-up door garage that its stands in front of.</p>
<p> Bi-facials were not so much in our quiver back when
the original PVs were installed. Now though I'm wondering if
there's any experience (or warnings) out there for swapping out
the single surface PVs with bi-facials. If we did so we're
thinking that spreading 3/4" white crushed rock or white tinted
concrete (or something else?)in an apron of sorts under and 10-20
feet in front would make for a significant boost in back-side PV
power production. Single side power production rating would also
go up by ~ 28%. Is it overly optimistic to expect an additional
average 15% with this scenario? </p>
<p> Granted there would be some blockage from the
back-side racking but its diffuse light. Normally you wouldn't
expect much reflection from the south side of an array to the back
side of the PVs but with 20 feet off the ground on the south side
and a shallow tilt......</p>
<p> Any experience with this "remodel" idea appreciated.
Pic attached</p>
<p>Bill</p>
<p>Feather River Solar Electric</p>
<p>Bill Battagin, owner</p>
<pre class="moz-signature" cols="72">4291 Nelson St. (Shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530-284-7849, 258-1641(cell)
CA. C10 Lic # 874049
Solar Powered since 1982
Home of the Sunny Side Up
<img moz-do-not-send="false" src="cid:part1.jSvXGipG.ahSlILpx@psln.com"
alt="" width="306" height="103"></pre>
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