PVI 10KW / PVI 13KW / PVI 15KW Installation and Operation Manual
DOC-020028 rev 028
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Turn on the dedicated 3-phase circuit breaker on the building electrical panel
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Verify the proper CLOCKWISE phase sequence at the “line” side terminals of the AC
disconnect
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Turn on the PVI 10KW / PVI 13KW / PVI 15KW inverter’s 3-phase AC disconnect
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If equipped with Fat Spaniel Inverter-Direct monitoring option, refer to Fat Spaniel
PV2Web Installation Manual for gateway startup sequence before turning on inverter’s DC
disconnect.
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Turn on the PVI 10KW / PVI 13KW / PVI 15KW inverter’s DC disconnect
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Watch the LED indicators for initialization (all three LEDs on), then slow-blinking green.
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Listen for contactor clunk (inverter on-line) and fast blinking green LED
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Listen for slight 60 Hz hum (transformer on-line)
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Following the fast-blinking green LED and high frequency switching sound (inverter on-
line and beginning to feed power into 3-phase circuit), the green LED should become solid
indicating that the inverter is operating normally.
Operation:
The control electronics and DSP will be active as soon as DC (PV) voltage reaches 200V DC. The
inverter will go on-line with the utility/building 3-phase grid when the DC voltage first exceeds
270V DC (strike voltage). Next, the inverter will load the array, bringing the DC voltage down
from 270V DC to not less than 205V DC.
Once the array open circuit voltage exceeds 270VAC and there is enough PV power at 205V DC
to back feed 3-phase AC power switching will automatically feed power to the grid.
Because the inverter goes completely off line at night or in dark conditions when no power can be
produced, there are no idling losses, adding 1-2% additional energy production annually over an
inverter design that remains on all the time.
Operating states, GFDI status and error indications shown by the LED indicators, which are
described in chapter 4, “Power, GFDI and Error LED Indicators”.
4 Power, GFDI and Error LED Indicators and LCD display
The inverter operates automatically without the need for user interaction or maintenance.
The PVI 10KW / PVI 13KW / PVI 15KW automatically starts back feeding 3-phase AC power
into the grid every morning as the sun rises, as soon as sufficient DC voltage and PV power is
available. The inverter DSP runs through various checks before going online with the grid and
feeding power into the grid.
