Solectria Renewables PVI 15KW User manual

PVI 10kW / PVI 13kW / PVI 15kW Installation and Operation Manual
DOCR-060002 rev30 1 July 7, 2010
PVI 10kW
PVI 13kW
PVI 15kW
208, 240 and 480VAC
INSTALLATION AND OPERATION MANUAL
Commercial, Grid-Tied Photovoltaic Inverter
© 2010, Solectria Renewables LLC
Subject to Change

PVI 10kW / PVI 13kW / PVI 15kW Installation and Operation Manual
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IMPORTANT SAFETY INSTRUCTIONS
This manual contains important instructions that shall be followed during installation and maintenance of the PVI
10kW / PVI 13kW / PVI 15kW Inverter. These instructions apply to 208, 240 and 480 VAC options only.
To reduce the risk of electrical shock, and to ensure the safe installation and operation of the inverter, the
following safety symbols are used to indicate dangerous conditions and important safety instructions.
WARNING: This indicates a fact or feature very important for the safety of the user and/or
which can cause serious hardware damage if not applied appropriately.
Use extreme caution when performing this task.
NOTE: This indicates a feature that is important either for optimal and efficient use or optimal
system operation.
EXAMPLE: This indicates an example.
SAVE THESE INSTRUCTIONS
PRESCRIPTIONS DE SECURITE IMPORTANTES
Ce manuel contient des instructions importantes qui doivent être suivies lors de l’installation et de l’entretient des
onduleurs PVI 10kW / PVI 13kW / PVI 15kW.
Afin de réduire les risques de choques électriques et d’assurer une installation et une opération sécuritaires de
l’onduleur, les symboles suivants sont utilisés pour identifier les situations dangereuses et les instructions
importantes de sécurité.
ATTENTION: Ceci indique un élément important pour assurer la sécurité de l’utilisateur ou
pour éviter d’endommager l’appareil si la procédure n’était pas suivie correctement.
Veuillez procéder avec précaution.
NOTE: Ceci identifie un attribut important soit pour assurer un fonctionnement efficace et
optimal du système.
EXEMPLE: Ceci indique un exemple.
CONSERVEZ CES INSTRUCTIONS

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IMPORTANT SAFETY INSTRUCTIONS
All electrical installations shall be done in accordance with the local and US and Canadian national
electrical codes ANSI/NFPA 70.
The PVI 10kW / PVI 13kW / PVI 15kW contains no user serviceable parts. Please contact Solectria
Renewables or a Solectria Renewables authorized system installer for maintenance.
Before installing or using the PVI 10kW / PVI 13kW / PVI 15kW, please read all instructions and caution
markings in this manual and on the PVI 10kW / PVI 13kW / PVI 15kW unit as well as the PV modules.
Connection of the PVI 10kW / PVI 13kW / PVI 15kW to the electric utility grid must be done after
receiving prior approval from the utility company and performed only by qualified personnel.
Completely cover the surface of all PV-arrays with opaque (dark) material before wiring them. PV arrays
produce electrical energy when exposed to light and could create a hazardous condition.
SAVE THESE INSTRUCTIONS
PRESCRIPTIONS DE SECURITE IMPORTANTES
Tous les travaux d’installation électrique doivent être exécutés en conformité aux normes
électriques locales ainsi qu’à la norme nationale américaine et canadienne ANSI/NFPA 70.
Le PVI 10kW / PVI 13kW / PVI 15kW ne contient aucune pièce requérant un entretient effectué
par l‘utilisateur. Pour toute maintenance, veuillez consulter Solectria Renewables ou un installateur agréé
par Solectria Renewables (les coordonnées de Solectria Renewables et des installateurs agréés sont
indiquées sur le site web de Solectria Renewables: www.solren.com).
Avant d’installer ou d’utiliser le PVI 10kW / PVI 13kW / PVI 15kW, veuillez lire toutes instructions et
toutes les mises en garde présentes dans ce manuel, sur le PVI 10kW / PVI 13kW / PVI 15kW et sur les
modules PV.
Le raccordement du PVI 10kW / PVI 13kW / PVI 15kW au réseau électrique ne doit être effectuée
qu’après avoir obtenu une entente d’interconnexion auprès de la compagnie locale de distribution
électrique et uniquement par du personnel autorisé et qualifié.
La surface de tous les capteurs PV doivent être recouverte entièrement d’un matériel opaque
(noir) avant de procéder au câblage. Les capteurs PV exposés a la lumière produisent du courant
électrique susceptible de créer une situation de risque.
CONSERVEZ CES INSTRUCTIONS

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Table of Contents
1Introduction………………………………………………………………..………… 5
2Installation…………………………………………………………………..……….. 5
2.1 Checking for Shipping Damage…………………………………...………. 6
2.2 Inverter Mounting.……………………………………………..………….. 6
2.3 Electrical Connection Considerations ………………………………….... 11
2.4 Making the Electrical Connections …………………………………….... 14
3Commissioning the Inverter ……………………………………………………….. 16
4Power, GFDI and Error LED Indicators and LCD display..…………………..….…. 17
5Troubleshooting & Opening the Main Enclosure………….………………...………. 22
6Warranty Information and Liability………………………………..………………… 25
7Technical Data…………………………………………………..…………….……… 30
8Appendices…………………………………………………………………...……… 34
Appendix A: Product Datasheet……………………………………………...……… 34
Appendix B: Example String Sizing………………………………………...……….. 34
Appendix C: Contact Info and Authorized Distributors, Dealers and Installers……... 34
Appendix D: UL 1741 Listing Letter…………………………………….……………35

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1 – Introduction
The PVI 10kW / PVI 13kW / PVI 15kW is a commercial, 3-phase grid-tied PV inverter designed
to be inter-connected to the electric utility grid. With this manual the PVI 10kW / PVI 13kW / PVI
15kW can be installed and operated safely. This installation guide is used as reference for the
commissioning and as a guideline on how to use the inverter most effectively.
Feeding power into the grid involves conversion of the DC-voltage from the PV-array to grid
compatible AC-voltage by “inverting” DC to AC. This unit feeds power into a standard 208V AC, 3-
phase commercial, industrial or institutional facility’s electrical system which is connected to the
electrical grid (480VAC version is also available, and 240VAC versions available as special order).
If the PV system and inverter are providing the same amount of electrical power that the facility
is using then no power is taken from or fed into the utility grid. If the facility is using more power than
the PV system is providing, then the utility grid provides the balance of power. If the facility is using
less power than the PV system is generating, then the excess is fed into the utility grid.
Be sure to look into local regulations regarding Net Metering/inter-connection in your local area.
Note that some utilities need to change their revenue kWh meter for proper Net metering measurement
and billing.
Fig. 1 Grid tied inverter application
2 – Installation
WARNING: Before installing the PVI 10kW / PVI 13kW / PVI 15kW, read all
instructions and caution markings in this manual and on the PVI 10kW / PVI 13kW / PVI
15kW as well as on the photovoltaic modules.
WARNING: Electrical installation shall be done in accordance with all local electrical
codes and the National Electrical Code (NEC), Canadian Electrical Code, ANSI/NFPA 70.
WARNING: Connecting the PVI 10kW / PVI 13kW / PVI 15kW to the electric utility grid
must only be done after receiving prior approval from the utility company and installation
completed only by qualified personnel/licensed electrician(s).
Photovoltaic
Array
PVI 10kW
PVI 13kW
PVI 15kW
Inverter
Electrical
Grid

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2.1 – Checking for Shipping Damage
The PVI 10kW / PVI 13kW / PVI 15kW inverters are thoroughly checked and tested rigorously
before they are shipped. Even though they are delivered strapped onto a rugged, oversized pallet or in a
crate, the inverters can be damaged in shipping which typically is the fault of the shipping company.
Please inspect the inverter thoroughly after it is delivered. If any damage is seen please
immediately notify the shipping company. If there is any question about potential shipping damage,
contact Solectria Renewables. A photo of the damage may be helpful.
Do not accept unit if it is visibly damaged or you note visible damage when signing shipping
company receipt. Report any damage immediately to shipping company. Do not remove the unit from
pallet / packaging. If it is determined that the unit must be returned, an RMA number must be obtained
from Solectria Renewables.
2.2 – Inverter Mounting
The PVI 10kW / PVI 13kW / PVI 15kW inverter is made up of a NEMA 3R (rainproof)
industrial enclosure containing electrical and electronic components including transformer, filters,
contactor, fusing, a sealed IP65 power & control electronic inverter unit (DMGI245) and AC and DC
disconnects mounted on the sides of the main enclosure. On the standard versions, the disconnects are
side facing. An option is available with forward-facing disconnects for tight spaces where width is
limited (see fig 2.2b). This option is especially useful in locations where limited space if available side-
to-side to allow local code clearance for the standard side facing disconnects.
Using the mounting diagrams in fig. 2.2a and fig. 2.2c, choose whether floor / roof, wall or stand
mounting will be used. The inverter includes mounting feet for attachment to floors, roofs / roof plates /
roof pans or stands. It also includes mounting tabs for wall mounting. You can also use a combination
of both mounting provisions. For example, 2 bolts in floor mount feet and 2 bolts in the wall mount
tabs.
It is recommended to use galvanized grade 5 or better bolts or stainless steel bolts. The correct
bolt size is 3/8” (10mm) diameter. If wall mounting is used, be sure to verify sheer and pullout strength
of anchors or other wall attachments.
WARNING: Severe injury or death could occur if the inverter mounting fails and the unit
falls on a person.
NOTE: If the PVI 10kW / PVI 13kW / PVI 15kW is mounted outside, make sure the
enclosure door remains closed in case of rain during the installation process. Since the AC
and DC connections are made in the disconnects only, there is no need to open the main
enclosure during installation.
NOTE: Always use all 4 mounting tabs if wall mounted.

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NOTE: The 380 lb. weight of the inverter will exert as much as 100 lbs. per bolt on the 4
wall mounts. Tension on the top bolts could also be 100 lbs. Make sure an appropriate
safety margin is used for both shear and tension of wall mounting bolts, anchors or other
attachments.
NOTE: If the roof / floor mounting only uses the inverter’s mounting feet, be sure you
use all 4 available foot mount bolt positions. If a stand is used, be sure inverter is
securely mounted to stand, the stand is adequately designed for the unit’s weight and the
stand is adequately attached to the floor / wall or roof.
NOTE: In the case of roof / floor mounting, temporary removal of disconnect doors may
facilitate easy wiring of the unit (only while wiring) however, only do so if necessary and
acceptable by local codes. Do not ever leave disconnect or main enclosure doors open
when you are not actively working on the unit.
Notes regarding mounting and placement of the inverter
Criteria for device mounting:
Because the power electronics is in an IP65 sealed enclosure within the NEMA 3R main enclosure,
the inverter can be mounted outdoors.
The very longest life for the inverter can be achieved by mounting it in a clean, dry and cool location
even given the unit’s robust construction and powerful cooling system.
For optimal electrical efficiency, use the shortest possible AC and DC cables and use the maximum
allowable cable size.
Avoid installation in close proximity to people or animals, as there is a small amount of high-
frequency switching noise.
Install the inverter in an accessible location following local codes for enclosure and disconnect door
clearances and proximity to other equipment (see mounting diagrams, Fig. 2.2a & 2.2c).
Although not required, installation at eye-height allows easy reading of the indicator LEDs on the
right side of the inverter above the DC (PV) disconnect.
For optimal inverter life and performance, do not mount the inverter in direct sunlight, especially in
hot climates, although the inverter is designed to function at full power continuously in up to 50oC
ambient temperatures. In hot climates if the unit must be mounted in direct sunlight a metal sun-
shield is recommended. It is recommended that the inverter is mounted on the north side of
buildings or on the north side of a PV array (which can provide some shade).
The inverter weighs 380 lbs. Be sure to verify load capacity of floor, roof or wall mounting area.

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The ambient temperature must be between –25oC and +50oC for full power, continuous operation.
The inverter will automatically reduce power or shut down to protect itself if ambient air
temperature rises above 50 oC.
The National Electrical Code (NEC) and Canadian Electrical Code require that the inverter be
connected to a dedicated circuit and no other outlets or device may be connected to this circuit. See
NEC Section 690-64(b)(1). The NEC also imposes limitations on the size of the inverter and the
manner in with it is connected to the utility grid. See NEC Section 690-64(b)(2).
The cooling air exhausts at the bottom of the unit. Nothing should block the 2” clear space under the
enclosure defined by the 2” tall mounting feet.
A minimum distance of 10” must be clear above the inverter for ventilation.
The inverter must be mounted with at least a 2” open space behind it. If wall-mounted, vertical, 2” x
2” uni-strut or channel can be used. Air should be able to flow behind the unit from below it to
above it.
If you are installing the inverter in a utility vault or electrical closet, the air circulation must be
sufficient for heat dissipation – provide external ventilation if necessary to maintain an ambient
condition of less than +50oC. The ambient temperature should be kept as low as possible.
Correct mounting positions for the inverter are shown on the following pages:

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Fig. 2.2a PVI 10kW / PVI 13kW / PVI 15kW Mounting Diagram with standard side-facing
disconnects
Fig. 2.2b PVI 10kW / PVI 13kW / PVI 15kW with optional forward-facing disconnect option

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Fig. 2.2c PVI 10kW / PVI 13kW / PVI 15kW Mounting Diagram with standard side-facing
disconnects

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2.3 – Electrical Connection Considerations
Fig. 3 Simplified electrical connection diagram
Fig. 4 Integrated Inverter Package
DC
disconnect
with fused
PV combiner
(if equipped)
Fused AC
Disconnect
Main enclosure
with integrated
inverter,
transformer
filters and
contactor
Cooling Air
In take
LED indicators and
GFDI warning label
Warning
Label
Nameplate, specs.
and ETL, UL1741
/ IEEE1547
Certification label
Wall Mounts
Foot Mounts
LCD Display
& Keypad
PVI 10 kW
PVI 13 kW
PVI 15 kW

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WARNING: All electrical installations shall be done in accordance with all local electrical
codes and the National Electrical Code, Canadian Electrical Code, ANSI/NFPA 70.
WARNING: The grounded DC photovoltaic connection (typically the negative DC
connection) is bonded to ground within the inverter through the ground fault detection and
interruption circuit (GFDI). The grounded DC connection should not be bonded to ground
at any other point in the system. The ungrounded DC connection (typically the positive
DC connection) must never be grounded at any time.
NOTE: When conduit hubs are used on the AC and DC disconnects in an outdoor or wet
location, rain-tight or wet location hubs that comply with the requirements of “Standard
For Fittings For Conduit and Outlet Boxes”, UL514B, are to be used.
AC Wiring
For the 3-phase AC wiring, three conductors are required (one per phase) plus additional
conductors for grounds (see grounding section below). No neutral connection is needed. 90°C copper
conductors must be used. The disconnect terminals are listed for 75oC wire; see NEC 310.10 regarding
temperature ratings of wire and terminals. Torque terminal screws to 45-50 in-lb. Temperature derates,
voltage drop and other considerations may dictate that larger than minimum wire sizes be used. 2 AWG
is the maximum size conductor that can be landed in the terminals. Verify that any wire size choices
meet local codes.
Inverter
Model AC Voltage Overcurrent Protection Number of AC Conductors Minimum AC Wire Size Maximum AC Wire Size
10kW 208VAC 40A 3 (1 per phase) 8 AWG, 90°C Cu 2 AWG, 90°C Cu
10kW 240VAC 40A 3 (1 per phase) 8 AWG, 90°C Cu 2 AWG, 90°C Cu
10kW 480VAC 30A 3 (1 per phase) 10 AWG, 90°C Cu 2 AWG, 90°C Cu
13kW 208VAC 50A 3 (1 per phase) 6 AWG, 90°C Cu 2 AWG, 90°C Cu
13kW 240VAC 50A 3 (1 per phase) 6 AWG, 90°C Cu 2 AWG, 90°C Cu
13kW 480VAC 40A 3 (1 per phase) 8 AWG, 90°C Cu 2 AWG, 90°C Cu
15kW 208VAC 60A 3 (1 per phase) 6 AWG, 90°C Cu 2 AWG, 90°C Cu
15kW 240VAC 60A 3 (1 per phase) 6 AWG, 90°C Cu 2 AWG, 90°C Cu
15kW 480VAC 40A 3 (1 per phase) 8 AWG, 90°C Cu 2 AWG, 90°C Cu
The AC grid impedance value at the connection point should be as low as possible to avoid an
increase of the AC voltage to non-permissible values while the inverter feeds to the grid. Minimizing
wiring impedance also results in higher system efficiency.
EXAMPLE: The impedance is the sum of the electricity grid impedance at building
distribution and all impedance values of conductors and connections.
Single conductor impedance values are:
Approximately 0.14 Ωfor 250 feet (76.2 m) 8 AWG conductor
Approximately 0.09 Ωfor 250 feet (76.2 m) 6 AWG conductor
Approximately 0.05 Ωfor 250 feet (76.2 m) 4 AWG conductor
Conductor impedance of < 0.09 Ωis recommended.
The total impedance phase to phase of the grid plus the interconnecting AC conductors should be
less than 0.18 Ω. Keep in mind that with larger wires, the AC voltages at the inverter will be closest to
the voltages at the building’s circuit panel, allowing for the most reliable inverter operation.

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DC Wiring:
For the DC wiring without an integrated fused PV combiner, two conductors are required (one
for the grounded conductor and one for the ungrounded conductor) plus additional conductors for
grounds (see grounding section below). 90°C copper conductors must be used. The disconnect
terminals are listed for 75oC wire; see NEC 310.10 regarding temperature ratings of wire and terminals.
Torque terminal screws to 120 in-lb. Temperature derates, voltage drop and other considerations may
dictate that larger than minimum wire sizes be used. 2/0 AWG is the maximum size conductor that can
be landed in the terminals. Verify that any wire size choices meet local codes.
Inverter
Model Maximum DC Input Current Number of DC Conductors Minimum DC Wire Size (at Max. DC Input Current) Maximum DC Wire Size
10kW 52A 2 6 AWG, 90°C Cu 2/0 AWG, 90°C Cu
13kW 68A 2 4 AWG, 90°C Cu 2/0 AWG, 90°C Cu
15kW 77A 2 4 AWG, 90°C Cu 2/0 AWG, 90°C Cu
For the DC wiring with the optional integrated fused PV combiner, 10-14 total conductors are
required (one for the grounded conductor and one for the ungrounded conductor of each string) plus
additional conductors for grounds (see grounding section below). 90°C copper conductors must be
used. The disconnect terminals are listed for 75oC wire; see NEC 310.10 regarding temperature ratings
of wire and terminals. Ungrounded conductors (typically the positive DC conductors) are landed in the
touch-safe fuse holders; torque their terminal screws to 12 in-lb. Grounded conductors (typically the
negative DC conductors) are landed in the terminal block; torque their terminal screws to 35 in-lb.
Temperature derates, voltage drop and other considerations may dictate that larger than minimum wire
sizes be used. 2/0 AWG is the maximum size conductor that can be landed in the terminals. Verify that
any wire size choices meet local codes.
String Fuse Size Minimum DC Wire Size Maximum DC Wire Size
8A 12 AWG, 90°C Cu 8 AWG, 90°C Cu
10A 12 AWG, 90°C Cu 8 AWG, 90°C Cu
12A 12 AWG, 90°C Cu 8 AWG, 90°C Cu
15A 12 AWG, 90°C Cu 8 AWG, 90°C Cu
AC and DC Grounds, Including Equipment Grounding Conductors and Grounding Electrode
Conductors:
In accordance with local codes, specifically 690 NEC 2008, all grid-tie PV systems must have
the following:
DC Equipment Grounding Conductor (EGC)
DC Grounding Electrode Conductor (GEC) and DC Grounding Electrode
AC Equipment Grounding Conductor (EGC)
AC Grounding Electrode Conductor (GEC) and AC Grounding Electrode
In certain cases, local codes may allow for a common grounding electrode to be used for both the
AC and DC grounding electrode. In that instance, the grounding electrode conductor should be
connected to the AC ground bar in the AC disconnect. If required, additional ground lugs of the
appropriate size for the grounding conductors can be added in the disconnects and bonded to the existing
ground bar in a code compliant manner.
Connection Number of Open Positions Wire Range
DC Ground Bar 3 10 - 4 AWG, Cu
AC Ground Bar 3 10 - 4 AWG, Cu

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Lightning and Surge Protection:
The inverter is designed with certain protections against voltage surges including certification to
UL 1741 / IEEE 1547, ANSI / IEEE 62.41 / 62.42. However, added protection and solid grounding
provisions are important for best protection against utility surges and surges created by indirect lightning
strikes.
The installation of a lightning surge arrester of the correct specification is recommended on both
the DC and AC sides of inverter. These can be installed on the outside of the disconnects and wired
using the manufacturer's directions. These devices gives important added protection from indirect
lightning strikes and resulting surges that provide protection beyond the inverter's included surge
protection.
It is a good idea to have the lightning protection system of the building checked and upgraded if
needed before the PV system is installed. (Are there air conductors along the roof-line of the building
well above the PV array? Do you see a copper ground wire running from the air conductors to a ground
rod?) These added protections are especially important for areas prone to thunder storms and possible
nearby lightning strikes. Although these added precautions cannot guarantee that there will be no
damage from lightning, they can help prevent or limit potential damage to the inverter.
Inverters connected in conjunction with emergency back-up generators:
WARNING: Please follow all applicable local codes. The inverters meet and are certified
to all UL1741 and IEEE1547 requirements.
Solectria Renewables does not endorse any of the connections discussed below. The following
are recommended courses of action that must be approved by local building officials before any
connections are made.
There are two methods to connect inverters to a grid-connected building that includes an
emergency generator.
1.) Connect inverter(s) on the grid-side of the transfer switch that disconnect the building when
the utility goes off. With this method, when the grid goes off, the inverters go offline, the transfer
switch disconnects the building from the PV inverters and grid. Then the generator starts and runs for
the duration of power outage. In this case, the inverter is on the grid-side of the transfer switch and the
inverters remain off the entire time until the grid returns.
2.) Connect inverter(s) on the load / building side of the transfer switch that disconnects the
building when the utility goes off. With this method when the grid goes off, the inverters go off, the
transfer switch disconnects the building with inverter(s) from the grid and the generator starts, the
inverter(s) will attempt to start in parallel with the building/load/generator. With a large size generator
and load, the inverter will most likely come back on and run well. If at any time the voltage or
frequency of the system goes outside of the limits set in UL1741, then the inverter will go off and re-
start 5 minutes later. This trial and restart sequence should not cause any trouble for the building,
generator or inverter, however, if the PV system has close to or more than the power level of the
generator and/or loads at any time, it is not recommended to use this hook up configuration (with the
inverter on the building/load side of the transfer switch)
2.4 – Making the Electrical Connections
WARNING: Follow PV module manufacturer’s directions. PV modules produce
electrical energy when exposed to light and could create a hazardous condition. To assure
safety from shock, completely cover the surface of all PV modules with opaque (dark)
material before wiring them.

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WARNING: Before making the DC connections at the DC disconnect, check the correct
polarity and admissible DC voltage between the grounded and ungrounded DC
connections.
WARNING: The wiring connections of the inverter to the DC voltage from the PV strings
and the AC voltage of the utility must be done with the AC and DC disconnects off,
building AC source circuit panel / breaker off and the PV module strings disconnected (or
covered with an opaque material). Open DFDI fuse holder before wiring DC connections.
WARNING: A fused, correctly rated PV combiner must be used with this version of the
inverter.
WARNING: Even when in the off position, the DC disconnect will remain live on the PV
side (“line”) when the PV modules are in daylight. The inverter (“load”) side of the
disconnect will also remain live after the disconnect has been shut off until 60 seconds after
the LEDs turn off, as electrolytic DC bus capacitors in the inverter discharge.
Connect each of the AC phase conductors and the AC equipment and electrode grounds to the
terminal in the AC disconnect. Phase conductors should land in the “LINE” terminals and ground
conductors should land in the ground bar.
For the DC wiring without an integrated fused PV combiner, connect the DC conductors from an
external string combiner to the labeled + and – terminals inside the DC disconnect. Connect the DC
grounds to the ground bar.
For the DC wiring with the optional integrated fused PV combiner, connect the DC conductors
from each string to the labeled + and – terminals inside the DC disconnect. Connect the DC grounds
to the ground bar.
Measure and verify proper DC voltages and polarity. Measure and verify proper AC voltages and
phase rotation. AC conductors must follow clockwise phase rotation for: L1/A, L2/B and L3/C.
Test with a phase rotation tester or a scope-meter. Extech, Fieldpiece, Fluke, UEi and many others
make phase rotation meters, sometimes referred to as motor rotation meter. Do not assume existing
color code or building wiring is correct! Incorrect phase sequence at the AC connection can damage
the inverter.
WARNING: AC and DC fuses may only be replaced with the following, available through
Solectria Renwables:
Inverter Model AC Voltage AC Fuse Replacement (Class R, 600V) DC Fuse Replacement for String Combiner
10kW 208VAC FRS-R-40A KLM-8, 10, 12 or 15A
10kW 240VAC FRS-R-40A KLM-8, 10, 12 or 15A
10kW 480VAC FRS-R-30A KLM-8, 10, 12 or 15A
13kW 208VAC FRS-R-50A KLM-8, 10, 12 or 15A
13kW 240VAC FRS-R-50A KLM-8, 10, 12 or 15A
13kW 480VAC FRS-R-40A KLM-8, 10, 12 or 15A
15kW 208VAC FRS-R-60A KLM-8, 10, 12 or 15A
15kW 240VAC FRS-R-60A KLM-8, 10, 12 or 15A
15kW 480VAC FRS-R-40A KLM-8, 10, 12 or 15A

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3 – Commissioning the Inverter
The inverter is mounted, all electrical connections are made and you are ready to apply power.
NOTE: Make sure all tools, parts, etc. are removed from the vicinity of the inverter
before turning on.
WARNING: Make a final check for correctness of all AC and DC wiring to the inverter
and in the system.
NOTE: With the PV modules connected and inverter disconnects still off, it is a good
final precaution to check PV voltage and polarity once more by carefully using a 600V,
DC rated digital volt meter and probing the positive (+) and negative (-) PV connections
in the disconnect enclosure. Also, verify clockwise phase rotation (L1-L2-L3) in the AC
disconnect using a phase rotation meter.
Turning on the inverter:
Turn on the dedicated 3-phase circuit breaker in the building electrical panel.
Verify the proper CLOCKWISE phase sequence at the “line” side terminals of the AC
disconnect.
Turn on the PVI 10kW / PVI 13kW / PVI 15kW inverter’s 3-phase AC disconnect.
Turn on the PVI 10kW / PVI 13kW / PVI 15kW inverter’s DC disconnect.
Watch the LED indicators for initialization (all three LEDs on), then slow-blinking green.
Listen for contactor clunk (inverter on-line) and fast blinking green LED.
Listen for slight hum (transformer on-line).
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 inverter operates automatically without the need for user interaction or maintenance. The
PVI 10kW / PVI 13kW / PVI 15kW inverter 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.
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 open circuit (strike voltage). Next, the inverter will load the array, bringing the DC voltage
down from 270V DC to not less than 205V DC.

PVI 10kW / PVI 13kW / PVI 15kW Installation and Operation Manual
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Once there is enough PV power at 205V DC to back feed 3-phase AC, power switching will
automatically feed power to the grid.
Operating states, GFDI status and error indications shown by the LED indicators, which are
described in the next sections.
4 – Power, GFDI and Error LED Indicators and LCD display
4.1 Power, GFDI and Error LED Indicators
The LED indicators mounted on the right-hand side of the enclosure just above the DC disconnect give
the user a quick look at what state the inverter is in and if it is operating normally.
GREEN – indicates “power”, the unit is powered up and / or feeding power to the grid
RED – “ERROR” or “FAULT”, the inverter is not providing power due to an error or fault
RED & YELLOW – indicate that a ground fault has been detected and it must be located before the
inverter will function. Check GFDI fuse if RED LED remains solid.
NOTE: If the GFDI fuse is blown, see “Opening the Main Enclosure” and Fig. 6,
“Description and Location of Components”. Turn off AC & DC power and locate, check
and replace the GFDI fuse with a 3/4A midget fuse 500V DC or 600V DC rated such as
Solectria Renewables P/N KLK ¾ or KLKD 3/4, or Bussmann, KLK-3/4 or KLKD-3/4.
Fig. 5 LED indicators
Description of LED symbols used to indicate LED status in this manual
LED Off
LED flashing (25% on, 75% off)
LED on once per second
LED on two times per second
LED on with short interruptions (75% on, 25% off)
LED on

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DOCR-060002 rev30 18 July 7, 2010
LED indicator Operating condition Description
green: standby (night) input voltage < 125 VDC
yellow:
red:
green: initialization unit is being initialized
yellow:
red:
green: stop Input voltage low < 210V
yellow: (275V @ startup)
red:
green: stop input voltage high > 430V
yellow: (475 VDC is the maximum allowable
red: PV open circuit voltage)
green: waiting for available DC power is too low
yellow: stronger sun
red:
green: waiting, presence of valid grid conditions
yellow: checking grid Is being checked
red:
green: starting / synchronizing -starting transformer
yellow: -synchronization to grid
red: -closing contactor
green: waiting for grid voltage
yellow: AC disconnect/breaker to be closed Is absent
red:
green: AC fuse blown One AC power fuse blown
yellow: (one phase) Or one v-sense fuse blown
red: Or one grid phase off/blown
green: AC VOLTAGE TOO HIGH AC Grid Voltage above UL limits
yellow: (alternating green & red LED) (>228V if 208VAC, >528V if 480VAC)
red:
green: feeding grid normal daytime operation
yellow: MPP or constant voltage mode
red:
green: de-rating mode or inverter at full power reduction of power fed to the grid
yellow: due to increased temperature of the
red: heatsink or inverter is at full rated power
green: GFDI fuse failure GFDI fuse is defective
yellow: see chapter 5
red:

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DOCR-060002 rev30 19 July 7, 2010
green: Contactor Failure Contactor timer run out before
yellow: (one blink) successful open or close
red:
green: Vsense Failure DSP board cannot communicate
yellow: (two blinks) with vsense board
red:
green: Thermal Overshot Contactor open during power
yellow: (three blinks) operation because of thermal overshot
red:
green: Current Sensor Failure Current sensor failed self-calibration
yellow: (Four blinks) during the unit wakeup
red:
green: Temperature Sensor Failure Temperature sensor read
yellow: (five blinks) below -30C
red:
green: Desat Failure Power stage desaturation failure
yellow: (one blink (pause) two blinks)
red:
green: IGBT over temperature Power stage junction temperature
yellow: (one blink (pause) three blinks) over limit (125C)
red:
green: Utility Failure A failure of the Utility (i.e. a blackout or
yellow: brownout) has occurred
red: Unit will restart 5 min after grid (AC)
restored
green: 5 minute wait for re-start Utility required 5 minute wait for restart
yellow: (alternating green, yellow & red LEDs in process since grid (AC) restored
red: in sequence)
green: Wong AC Phase Sequence Switch two phase wires for correct
yellow: clockwise sequence
red:

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4.2 LCD Display
Button Description
ESC: To move up a level from the current menu.
: To scroll up/down the individual menu items
: To enter into selected menu.
Main/Default Screen
Eac: XXXX kWh
Pac: XX W
Press any of the following keys to move from the main/default screen into the Start Menu
To enter into selected menu item, press the key.
Start Menu
1. Measurements
2. Set Inverter
3. Set Monitor
4. KYZ Meter
5. Display Info