© 2015 SunEdison
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F-SERIES and R-SERIES
72-Cell Installation Guide
5.0 Maintenance
Check the modules for any damages to the glass
surfaces and frames on a regular basis. Routinely
inspect all modules for safe electrical connections,
sound mechanical connections, and for any shading or
corrosion issues. If dirt or debris becomes built-up clean
the glass using only a soft cloth, with a mild, non-abrasive
detergent and water. SunEdison recommends using mild
cleaning liquids; a neutral pH in the range of 6.0 to 8.0
is recommended. Chemicals with pH less than 6.0 or
greater than 8.0 should be avoided as it may damage the
glass surface and/or the anti-reflective coating. Please
consult with the system designer to determine the
best cleaning and inspection schedule based on local
environmental conditions.
Do not power wash, use harsh cleaning materials or
coarse objects such as scouring powder, steel wool,
scrapers, blades or other sharp instruments to clean the
module. Use of any such methods and materials will void
the product warranty. Do not wash modules with water
that is more than 20 C cooler than the surface of the
module. Doing so can cause the glass to crack.
WARNING:
Use caution when cleaning the back surface
of the module to avoid scratching the substrate materials.
5.1 String Grounding
Silvantis F-series modules come in two types, PID-free
and PID-resistant. PID-free panels have a “PID-free”
designation on the nameplate label (Figure 6a) as
well as a “P” on the right side of the bar code label
(Figure 6b). String grounding requirements for the two
types of modules are:
• PID-free modules do not require string grounding
and are fully compatible with floating ground
transformerless and micro-inverters, as well as with
galvanically isolated inverters.
• PID-resistant modules: For string voltages greater
than 100 V PID-resistant modules must be used with
galvanically isolated inverters with the negative end
of the string held at ground potential. Floating ground
transformerless string inverters may not be used with
PID-resistant modules. PID-resistant modules are fully
compatible with microinverters where string voltage
is less than 100 V, in which case string grounding is
not required.
Figure 6:
PID-free module designations
(a)
(b)
