PVI13KW Installation and Operation Manual
DOC-020028 rev 006
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Because the PV modules also have a reduction in voltage at high cell temperatures, you must make
sure the MPP voltage of the strings will not drop below the minimum inverter DC input voltage of
225V DC in very hot temperature conditions.
Both the maximum open circuit voltage (OCV) when at cold extreme and minimum MPP voltage
when at hot extreme can be calculated for a PV module using its specification sheet. PV module
string sizing can then be used to determine how many modules can/should be used in a string.
Input DC (PV) specifications for PVI13KW inverter
Input voltage MPP range
225V-385V DC
Maximum open circuit voltage
450V DC
(under all conditions)
Maximum input current
60A DC
Maximum input power
14 kW DC
(inverter limited)
Maximum recommended
15-16 kW DC
PV power (modules @ STC)
DC disconnect for PV positive (+)
included
Ground fault detection, must detect
5A
Ground fault interrupt
5A
Output to AC grid connection:
The PVI13KW is designed to feed power into a standard 60Hz, 3-phase 208V AC utility service or
208V AC provided within a facility by a step down transformer of not less than 15kVA. As
required by NEC, there must be a dedicated 3-phase circuit breaker for the PV inverter connection.
This circuit breaker (and wiring) must have a rating of at least 45A (50A recommended) for the
208VAC version. A 30A circuit breaker and 8AWG wiring is recommended for the 480VAC
version.
The inverter is designed to work with the range of AC voltage for a 208VAC 3-phase service
defined by UL1741 of 190V to 228V. The 480VAC output version of the inverter has an AC
voltage range of 438V to 528V. (A 30A service and breaker is required, however 8AWG wire is
recommended.)
