tsbm Renewable Energy for Everyone
tsbm's BIFACIAL SOLAR SYSTEM
TB60M BIFACIAL SOLAR PANEL
TBxM bifacial panel collect sunlight by both front and rear surfaces, generating additional electricity from light reflected from the ground, rooftops, clouds or the atmosphere as well as from light entering the module’s rear-side directly. By utilizing both sides of the panel, TSBM’s
TB60M series generate significantly more power per installed area or kWp, resulting in:
10%-20% higher energy (kWh) in standard applications
Up to 50% higher energy (kWh) in vertical installations
Total module power of 348 W (60 cell module, )
lIdeal for white-roof installations, with significant US federal and state tax credits.
 Values are installation dependent and are defined for 10%-20% gain conditions
WHAT IS BIFACIAL SOLAR?
Bifacial Solar panel is dual-sided solar panel which can collect sunlight from both front and rear side.
Increasing output per panel by catching additional reflected and scattered sunlight using rear side.
Solar Cell Structure
Bifacial solar cell is made from single piece of mono crystalline silicon wafer.
Conventional solar cell has sunlight receiving surface at front side, and rear side covered by aluminum paste which is unable to receive light. Bifacial solar cell's rear side has another diffusion layer similar to front side and can receive sunlight into silicon wafer structure. This structure eliminates aluminum paste and allows thinner silicon wafers (no bowing effects) and can drive down the cell cost.
Conventional Solar Cell
Aluminum paste (non-transparent)
CZ Silicon wafer
Al - BSF
Al - Contact
Bifacial Solar Cell
Open rear side structure (transparent)
CZ Silicon wafer
Solar Panel Structure
Bifacial Solar panel has transparent rear side cover by either tempered glass or transparent back sheet which enables sunlight capturing from rear side.
Conventional Solar Panel
Bifacial Solar Panel
Back sheet (non-transparent)
Solar cell string
Tempered glass or
transparent back sheet
Solar cell string
POWER OF BIFACIAL SOLAR
Back side contribution of Bifacial solar monitored and tested on commercial rooftop installation.
"Bifacial Gain" = "difference between standard Mono-facial panel and Bifacial panel at kWh/kWp" was recorded 23%.
Site : Geilenkirchen, Germany
System monitored and supervised by Fraunhofer/ISE
Standard commercial rooftop installation (Flat roof)
Comparing standard Mono-facial panel and Bifacial Panel
Tested from : 2011-2012
Module tilted : 15°
Azimuth : 145°（South-East)
Albedo (ground reflectance) : 78%
Module elevation : 30cm
Inverter : SMA Sunny boy 1.5kW x 2/string
PERFORMANCE ON SNOW
In snowing season, conventional solar panel will stop generating power since the panel front side covered by snow.
Meanwhile, open rear side of our Bifacial system design receives strong reflection from the ground covered by snow and start generating power when sun rises. Once Bifaical panel starts generating electricity, panel temperature will rise gradually due to the resistance. This heat enables covered snow on the front side to be slide down easily from the panel and start generating from both sides.
① Rear side receives strong reflection from snow.
② Panel heats up from power generation
Stop generating power due to snow covering the panel.
③ Heat makes snow on the panel easy to slide down or to be melt.
Outdoor experiment of solar panel on snow
Nov. 2012 ~ Feb. 2013 @ Hirosaki city, Aomori, Japan
BIFACIAL SOLAR "VERTICAL INSTALLATION"
BIFACIAL PANEL SUITS VERTICAL INSTALLATION
Unique feature of Bifacial solar allows vertical installation receiving sunlight from both front and rear.
In case of East-West installation, front side will receive sunlight in the morning and continues to receive sunlight in the afternoon using rear side. Comparing with standard mono-facial solar at optimum inclination facing south, vertical Bifacial solar installation can produce comparable kWh energy result.
Optimum inclined facing South
Vertical facing East-West
SOUTH 30° x 40pcs
VERTICAL x 40pcs
roof space for other purposes
*Vertical installed Bifacial panel can produce 90-100% energy comparing to standard inclined South faced panel. (Depends on panel model and latitude of the site. Please contact us for details)
Another advantage of vertical installed Bifacial solar is being free from installing azimuth direction.
Energy production of standard Mono-facial solar significantly decreases if it is not facing South. Vertical Bifacial solar can face either South, East or West without losing total annual energy production.