I even understood Phill’s graph, and that’s saying something for me lol!
I don’t fare to well when it comes to graphs, in fact I suck at it. But this was as clear as day to me.
If the bi-facial panels are mounted on a carport at a fixed angle, and with good reflective ground surface, what happens at noon PV peak? Does the Vmp and/or Imp increase to deliver the “up to 35%” increase in power? Do you use the “Integrated rating” for PV String design?
Description
General Data
• Cell: Half Cell Mono Crystalline Bifacial
• Cell Type: HJT
• No. of Cells: 144(6×24)
• Junction Box: IP67, 3 Bypass Diodes
• Connector: MC4
• Cable Length: 300mm(+) / 300mm(-)
• Glass: Double Glass
Electrical Parameters at STC
• Maximum Rated Power(Pmax): Front: 465W / Back: 375W
• Maximum Power Voltage(Vmp): Front: 45.50VDC / Back: 45.92VDC
• Maximum Power Current(Imp): Front: 10.22A / Back: 8.18A
• Open Circuit Voltage(Voc): Front: 53.65VDC / Back: 53.21VDC
• Short Circuit Current(Isc): Front: 10.98A / Back: 8.84A
• Module Efficiency: Front: 20.81% / Back: 16.80%
Integrated Power at STC (Reference to 465W Front)
• Power Gains: 15%
• Maximum Power Output(Pmax): 534W
• Maximum Power Voltage(Vmp): 45.40VDC
• Maximum Power Current(Imp): 11.75A
• Open Circuit Voltage(Voc): 53.75VDC
• Short Circuit Current(Isc): 12.63A
In practice, even a mono-facial panel rarely seems to deliver its full rating. I suppose a bifacial panel will be similar with a bit of a kick.
I have heard on other forums that snow-prone areas benefit, but they are not really worth it in other areas if they cost more.
I would certainly like to experiment with them in a vertical mount to catch the first and last few watts of the day.
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