Silfab Installation Manual

• Ensure that the grounding area for the connection is

clean and free from oxides or any debris that could

impede the electrical grounding.

Always follow safety procedures when

installing any grounding/mounting system.

9.3 Silfab SLA X Bifacial Modules

Bi-facial modules are able to capture and convert light

from both the front and back surface of the module,

as shown FIGURE 6.a As a result, Levelized cost of

electricity (LCOE) can be further reduced with Silfab

bi-facial technology through rear-side generation up

to 20% annual gain. This section outlines the funda-

mental components for consideration to maximize

power output of your bi-facial PV system.

Step #1: Highest Surface Reflectivity/Albedo

• Performances of bifacial PV modules are linearly

dependent on the albedo.

• Best results: crushed white rock, bright white paint,

or an ENERGY STAR™ roof.

Step #2: Select the optimum height of installation &

mounting structure

• Elevate the module above as much as possible, as it

will capture more ground-reflected light.

• For flat ground/rooftop installation it’s recommend-

ed a minimum height of 50-70 cm (19 11/16 – 27

9/16”).

• Avoid shading the back side of the module from the

support rack as much as possible.

Step #3: Tilt angle of modules

• Case-by-case based on site location. For site

specific energy yield analysis and power reports,

please contact Silfab Solar.

Important note:

Electrical connection

With an expected gain of power (Pmp) and current

(Isc) from the rear due to significant light contribution,

i.e from a high albedo background, the user/designer

must consider the electrical performance of both

front and irradiance % on backside for the following

below. It’s suggested at least +20% bi-faciality gain.

• Wire and string sizing

• Inverter short-circuit current input limit

• Overcurrent protection device

TIP: With multi rows structure, connect horizontal

series of modules to different MPPT to reduce losses

due to mismatch on reflected light on back side.

Document Number: MAN-SFO-06 | SAFETY AND INSTALLATION MANUAL FOR PHOTOVOLTAIC MODULES