The rear side insulation can advantageously be provided by {TAIL ~ an inflatable plastic member} structurally similar to that provided on {HEAD ~ the upper or solar exposed side} of the panel 
The rear side insulation can advantageously be provided by { TAIL ~ an inflatable plastic member } structurally similar to that provided on { HEAD ~ the upper or solar exposed side } of the panel
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH