Wels, October 12th 2015
OVERSIZING FRONIUS SYMO 10.0-3-M – 20.0-3-M
Fronius International GmbH
hereby confirms that the inverters
/ Fronius Symo 10.0-3-M up to Fronius Symo 20.0-3-M
can be oversized 50% above the rated nameplate capacity without voiding the manufacturer’s warranty,
provided that
/ String configuration adheres to the voltage and current window guidelines published in the operation manual
/ The open circuit voltage of the PV generator does not exceed the maximum input voltage of the inverter under
any circumstances (temperature, irradiance)
/ The maximum DC array short circuit current must not exceed 1.5 times the maximum DC input current (Max.
input current, Idc max 1 / Idc max 2) of each MPPT of the inverter. The maximum total DC short circuit current
(summing up all connected arrays, MPPT1 + MPPT2) must not exceed 1.5 times the maximum total DC input
current (Max. usable input current total, Idc max 1 + Idc max 2) of the inverter, regardless of whether the MPPTs
are connected in parallel or not. For more detailed information, please see the technical datasheets.
Fronius International GmbH
Solar Energy Division
Froniusplatz 1
A-4600 Wels
DI Thomas Mühlberger
Head of Solution Management
02/2017
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