Solectria Renewables SGI 225 User manual

SGI 225
SGI 250
SGI 266
SGI 300
SGI 500
SGI 500PE
INSTALLATION AND OPERATION MANUAL
Revision E
© 2012, Solectria Renewables LLC

Installation and Operation Manual (Rev E) SGI Series Inverters
IMPORTANT REGISTRATION AND
WARRANTY INFORMATION
For warranty to become active, this inverter
must be registered. To activate warranty and
register inverter, please visit the link below.
www.solren.com/registration

Installation and Operation Manual (Rev E) SGI Series Inverters
IMPORTANT SAFETY INSTRUCTIONS
In this manual “inverter” or “inverters” refers to the inverter models: SGI 225, SGI 250, SGI 266,
SGI 300, SGI 500PE and SGI 500 unless one of the specific models is noted.
This manual contains important instructions that shall be followed during installation and
maintenance of the SGI inverter.
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

Installation and Operation Manual (Rev E) SGI Series Inverters
IMPORTANT SAFETY INSTRUCTIONS
All electrical installations shall be performed in accordance with the local, American and Canadian electrical
codes.
The inverter contains no user serviceable parts. Please contact Solectria Renewables or a Solectria Renewables
authorized system installer for maintenance. See Appendix C for Solectria Renewables contact information
and authorized system installers.
Before installing or using the inverter, please read all instructions and caution markings in this manual and on
the inverter as well as the PV modules.
Connection of the inverter to the electric utility grid must be completed after receiving approval from the
utility company and must only be performed by qualified personnel.
Completely cover the surface of all PV arrays with an opaque material before wiring them. PV arrays produce
electrical energy when exposed to light and could create a hazardous condition.
The inverter enclosure and disconnects must be locked (requiring a tool or key for access) for protection
against risk of injury to persons. The enclosure includes a lockable handle and comes with a key. Keep the key
in a safe location in case access to the cabinet is needed. A replacement key can be purchased from Solectria
Renewables.
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.
Le SGI ne contient aucune pièce requérant un entretient effectué par l‘utilisateur. Pour toute maintenance,
veuillez consulter Solectria Renewables ou un installateur agrée par Solectria Renewables (les coordonnées de
Solectria Renewables et des installateurs agrées sont indiquées sur le site web de Solectria Renewables:
www.solren.com.
Avant d’installer ou d’utiliser le SGI, veuillez lire toutes instructions et toutes les mises en garde présentes
dans ce manuel, sur le SGI et sur les modules PV.
Le raccordement du SGI 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

Installation and Operation Manual (Rev E) SGI Series Inverters
Table of Contents
1.0 Introduction ...................................................................................................................................... 1
2.0 Site Preparation and Inverter Placement ......................................................................................... 4
2.1 Inverter Positioning....................................................................................................................... 6
2.2 Leveling the Inverter ..................................................................................................................... 6
2.3 Mounting Details........................................................................................................................... 7
2.4 DC and AC Wire Entry Points ........................................................................................................ 8
3.0 Installation ...................................................................................................................................... 10
3.1 Checking for Shipping Damage ................................................................................................... 10
3.2 Inverter Mounting....................................................................................................................... 11
3.3 Removing Inverter from Pallet and Moving Inverter Into Place................................................. 11
4.0 DC Connections from the PV Array and AC Connections to the Electrical Utility Grid ................... 17
4.1 Grounding Electrode Conductor (GEC) ....................................................................................... 17
4.2 Equipment Grounding Conductor (EGC)..................................................................................... 18
4.3 DC Subcombiner Wiring.............................................................................................................. 19
4.4 DC Ground Fault Detection and Interruption .............................................................................24
4.5 AC Wiring .................................................................................................................................... 25
4.6 AC Ground Fault Detection ......................................................................................................... 28
4.7 Lightning and Surge Protection...................................................................................................28
4.8 Remote Shutdown Wiring...........................................................................................................28
4.9 SolrenView Monitoring ...............................................................................................................30
4.10 SolrenView Air Monitoring..........................................................................................................30
5.0 Commissioning the Inverter PV System.......................................................................................... 31
5.1 Turning on the Inverter...............................................................................................................31
5.2 Operation .................................................................................................................................... 31
5.3 Turning off the Inverter .............................................................................................................. 31
6.0 LCD Display and LED Indicators....................................................................................................... 32
6.1 LCD Display.................................................................................................................................. 32
6.2 Button Description...................................................................................................................... 32
6.3 Screen Descriptions..................................................................................................................... 33
6.4 LED Indicators ............................................................................................................................. 36

Installation and Operation Manual (Rev E) SGI Series Inverters
7.0 Troubleshooting and Inverter Messages ........................................................................................37
7.1 Inverter Messages....................................................................................................................... 37
8.0 Product Warranty & RMA Policy.....................................................................................................39
8.1 Warranty Policy...........................................................................................................................39
8.2 Return Material Authorization Policy .........................................................................................44
9.0 Technical Data................................................................................................................................. 45
9.1 Input DC (PV) Specifications........................................................................................................46
9.2 Output AC Specifications ............................................................................................................ 47
9.3 Other Specifications ....................................................................................................................49
9.4 Internal Circuit Diagram.............................................................................................................. 52
10.0 Appendices...................................................................................................................................... 53
10.1 Appendix A –SGI 225, SGI 250, SGI 266, SGI 300, SGI 500PE and SGI 500 Data Sheet ..............53
10.2 Appendix B –String Sizing Tool................................................................................................... 53
10.3 Appendix C –Contact Information.............................................................................................. 53
10.4 Appendix D –Authorized Distributors ........................................................................................53
10.5 Appendix E –UL1741 / IEEE 1547 / CSA22.2#107.1 Listing Letter ............................................. 54

Installation and Operation Manual (Rev E) SGI Series Inverters
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1.0 Introduction
The Smart Grid inverters (SGI) are commercial, three-phase grid-tied PV inverters designed to
be interconnected to the electric utility grid. By following this manual the inverter can be
installed and operated safely. This installation guide is used as a reference for the
commissioning process 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, three-phase
commercial, industrial, institutional or electrical utility facility’s electrical system which is
connected to the electrical grid.
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 follow local regulations regarding net metering and interconnection in your local
area. Note that some utilities need to change their revenue kWh meter for proper net metering
measurement and billing.
Figure 1.1 –Grid-Tied Inverter Application
PV Array
SGI Series Inverter
Electrical
Grid

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Figure 1.2 –The SGI Inverter (Front)
DC disconnect
switch
LEDs
LCD display
and keypad
Nameplate, specs
and ETL, UL1741 /
IEEE1547 / CSA
certification labels
Warning label
Lift eyes
Cooling air intake
Left side of enclosure
contains integrated inverter,
filters and contactor
Right side of enclosure
contains isolation
transformer and
inductors

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Figure 1.3 –The SGI Inverter (Rear)
Exhaust air vents

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2.0 Site Preparation and Inverter Placement
The inverter is comprised of a rainproof industrial enclosure containing electrical and electronic
components and AC and DC integrated disconnecting means.
NOTE: If the inverter is mounted outside, ensure that the enclosure doors remain
closed during the installation process in case of rain or snow. Leaving these doors
open during installation will void the warranty.
NOTE: If the inverter is to be stored outdoors before being installed and
commissioned, care must be taken to avoid condensation inside the unit. Removing
the protective shipping wrap and placing a small space heater inside the unit can help
minimize the amount of condensation that can occur during onsite outdoor storage.
Criteria for device mounting:
Because the power electronics are within the rainproof main enclosure, the inverter can be
mounted outdoors.
The maximum life for the inverter can be achieved by mounting the unit in a clean, dry and
cool location.
For optimal electrical system 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 an audible high-
frequency switching noise.
Install the inverter in an accessible location following NEC codes for enclosure and
disconnect door clearances and proximity to other equipment.
Although the inverter is designed to function at full power continuously in up to 50oC
ambient temperatures, for optimal inverter life and performance, do not mount the
inverter in direct sunlight, especially 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 ground mount PV array.

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CAUTION: Please follow these guidelines:
Be sure to verify load capacity of floor, roof or concrete pad mounting area.
Table 2.1 –Weight and Required Fork Lift Capacity
The ambient temperature must be between –40oC and +50oC for full power, continuous
operation. The inverter will automatically reduce power or may shut down to protect itself
if ambient air temperature at the intake rises above 50oC.
The National Electrical Code (NEC) requires that the inverter be connected to a dedicated
circuit and no other outlets or device may be connected to this circuit. See NEC Article 690.
The NEC also imposes limitations on the size of the inverter and the manner in which it is
connected to the utility grid. See NEC Article 690 for guidance within the US.
A minimum distance of 18 inches must be clear behind the inverter for cooling air exhaust
and service access. A clearance distance of 36 inches behind the inverter is highly
recommended to aid in cleaning the exhaust screens.
A minimum distance of 12 inches must be clear above the inverter for ventilation.
A minimum distance of 6 inches must be clear to the sides of the inverter.
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 to maintain an ambient
condition of less than 50oC. The ambient temperature should be kept as low as possible at
all times for optimal inverter operation and life.
Model
Max. heat loss
SGI 500
55000 Btu/hr
SGI 500PE
55000 Btu/hr
SGI 300
32000 Btu/hr
SGI 266
28000 Btu/hr
SGI 250
26000 Btu/hr
SGI 225
24000 Btu/hr
Table 2.2 –Indoor Cooling Requirements
Inverter Model
Weight
Fork Lift
SGI 500, 500PE
6980 lbs.
8000 lbs
SGI 300, 266, 250
5650 lbs.
6000 lbs
SGI 225
5170 lbs
6000 lbs

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2.1 Inverter Positioning
Correct mounting position for the inverter is vertical with the mounting feet on the floor. This
diagram shows the basic inverter footprint dimensions:
Figure 2.1 –SGI Series Dimensions (Top View)
2.2 Leveling the Inverter
The inverter must be mounted on a flat and level plane in order for proper operation of the
doors and integral DC disconnect and AC breaker. To check if the inverter is properly leveled,
the top of each pair of doors should be aligned with one another. If the top edges are not
aligned, level the inverter by placing aluminum shims under the appropriate mounting foot
prior to securing the inverter.
Acceptable Door Alignment Incorrect Door Alignment
Figure 2.2 –Leveling the Inverter for Proper Door Alignment
NOTE: Failure to properly level the inverter may cause damage to the enclosure,
resulting in water infiltration or degradation of the enclosure.
NOTE: Failure to properly level the inverter may cause damage to the operating
mechanisms of the integral DC disconnect and AC breaker.

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2.3 Mounting Details
The inverter includes mounting feet with 6 holes (1/2”, 12mm diameter) on a rectangular
pattern for attaching the inverter. Note that the outer 4 mounting holes are 2” inside each
corner of the main inverter enclosure.
Figure 2.3 –SGI Series Mounting Pattern (Top View)
It is recommended to use six hot dip galvanized grade 5 or 8 steel bolts or stainless steel bolts
for mounting the feet. The correct bolt size is 3/8” (10mm) diameter. Use a heavy lock washer
and flat washer with each bolt. Alternatively, a “toe-plate” can be used at the end of each
4x4” tube foot. After mounting is completed, remove shipping aids from front shrouds and
inside unit.
WARNING: Severe injury or death could occur if the inverter mounting fails and
the unit tips over or falls on a person.
NOTE: The weight of the inverter will exert an added load to floor, roof or pad
where mounted. Be sure to verify proper load capacity of mounting surface.
NOTE: If the roof/floor mounting only uses the inverter’s mounting feet, be sure
all 6 available foot mount bolt positions are used to secure the inverter.
Front
Left
Right

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2.4 DC and AC Wire Entry Points
AC and DC wiring must enter through the provided conduit cutout in the bottom of the inverter
enclosure or through the alternate conduit entries. Alternative locations are the left side for DC
and back panel for AC.
Figure 2.4 –AC and DC Conduit Entry Points
AC and DC
Conduit Plate
Alternate AC
Conduit Entry
Alternate DC
Conduit Entries

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Fig 2.5 –Alternate DC Conduit Entry Locations
Figure 2.6 –Alternate AC Conduit Entry Location

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3.0 Installation
WARNING: Before installing the inverter, read all instructions and caution markings in
this manual and on the inverter as well as on the photovoltaic modules.
WARNING: Electrical installation shall be performed in accordance with all local
electrical codes and the National Electrical Code (NEC), Canadian Electrical Code for
Canada (CEC), NFPA 70.
WARNING: Connecting the inverter to the electric utility grid must only be completed
after receiving prior approval from the utility company and installation performed only
by qualified personnel/licensed electrician(s).
3.1 Checking for Shipping Damage
The inverter is thoroughly checked and tested rigorously before it is shipped. Even though it is
bolted onto a rugged, oversized pallet for delivery, the inverter can be damaged during shipping
by poor handling, trucking or transfer station activity.
Please inspect the inverter thoroughly after it is delivered. If any damage is seen please
immediately notify the shipping company to make a claim. If there is any question about
potential shipping damage, contact Solectria Renewables. Photos of the damage may be helpful
in documenting potential shipping damage.
Do not accept the unit if it is visibly damaged or if you note visible damage when signing
shipping company receipt.
Note damage on shipping papers with the truck driver! Report damage immediately to
the shipping company.
Do not remove the unit from pallet/packaging if damage is evident.
If it is determined that the unit must be returned, a RMA number must be obtained
from Solectria Renewables prior to shipping the unit back.

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3.2 Inverter Mounting
WARNING: The inverter may tip over if improperly moved, potentially causing
damage to equipment, personal injury or death.
-Note the center of gravity to guide lifting methods.
-Do not tilt the pallet or inverter while moving it.
-Safety chains and straps must be used to prevent any possible tilting or shifting
of the inverter in any direction while being lifted.
WARNING: Do not install the inverter on or over combustible surfaces or materials.
3.3 Removing Inverter from Pallet and Moving Inverter Into Place
It is recommended to keep the inverter secured to the pallet and moved as close as possible to
the final location prior to removing the pallet. To remove the securing bolts use a 9/16”socket
and/or wrench. Completely remove each nut and bolt from the pallet.
The center of gravity of the inverter is well to the right of center and is marked with a label on
the left door of the transformer enclosure (right half of the enclosure).
Use an 8,000lb capable forklift for the SGI 500and SGI 500PE or 6,000lb capable forklift for the
SGI 225-300 if lifting from the bottom. The forks should be set to an inside spacing so they fit
just to the left of the inverter's 4”x 4" aluminum tube feet.
Before lifting, make sure forks are against the left edges of both the right most foot and center
foot and install safety chains (with failsafe hooks) to prevent inverter from sliding off forklift
(see following diagrams).

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Figure 3.1 –Forklift Lifting Positions
Use positions A when lifting or moving the inverter while attached to the pallet
Use positions B when lifting or moving the inverter removed from the pallet
Note that the lifting diagrams show the inverter being lifted while mounted on the shipping
pallet. If the inverter is lifted without the shipping pallet, a properly rated safety strap must be
placed over the top of the inverter firmly holding it down on the lifting devices forks. It is
recommended to use two lifting straps, one holding the inverter to the left fork and another to
the right fork.
NOTE: Failure to follow these lifting guidelines may cause structural damage to the
inverter and void the warranty.
Alternatively, the inverter can be lifted using the lifting eyes on the top. If using this lifting
method, lift with vertical chains and hooks connected to a proper lifting device. Do not lift with
an “A”chain between the two eyes left-to-right as this will result in permanent damage to
the inverter. At a minimum, use 3 “A”chain sets going front-to-rear with each side of the “A”
having a chain length of 4 feet minimum. Each “A”chain must be tensioned equally. The
recommended method is a 3 beam hoist with 6 equal-length tensioned chains hanging down,
one over each eye bolt. An A-frame can then be used above the 3 beams. Never lift only by the
outer 4 eyebolts as this will damage the inverter.
B
B
A
A

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Figure 3.2 –Preferred Straight-Chain Lifting Method

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Figure 3.3 –Minimum Requirements for Eyebolt Lifting
4’ Minimum