YASKAWA Solectria PVI 25TL-208 Operating instructions

Commercial 1000VDC String Inverters
Solectria® PVI 25TL-208
Solectria® PVI 50TL-480
Solectria® PVI 60TL-480
Installation and Operation Guide
Models: PVI 25TL-208
PVI 50TL-480
PVI 60TL-480

Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
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Before You Start............................................................................................................................................................ 5
1. Important Safety Instructions............................................................................................................................... 6
Hazard Symbols.............................................................................................................................................6
Symbols on Labels.........................................................................................................................................7
General Safety Messages..............................................................................................................................7
2. Overview............................................................................................................................................................. 10
Intended Use...............................................................................................................................................10
Inverter Features ........................................................................................................................................11
Inverter Protections....................................................................................................................................12
Smart Inverter Functions (default state) ....................................................................................................12
Inverter Diagrams .......................................................................................................................................13
Schematic Diagram and Circuit Design .......................................................................................................15
Anti-islanding Detection .............................................................................................................................17
DC Ground Fault Protection........................................................................................................................17
Surge Suppression.......................................................................................................................................17
DC Arc-fault Protection...............................................................................................................................18
Module-Level Rapid Shutdown...................................................................................................................18
Communication Overview ..........................................................................................................................18
Labels ..........................................................................................................................................................19
Unpacking ...................................................................................................................................................20
3. Installation .......................................................................................................................................................... 20
Installation Sequence Overview .................................................................................................................23
Mechanical Installation...............................................................................................................................24
Electrical Installation...................................................................................................................................39
Communication Installation........................................................................................................................60
Communication Wiring...............................................................................................................................63
4. User Interface .....................................................................................................................................................64
Description of the Interface........................................................................................................................64

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Operation State...........................................................................................................................................66
Interface Types ...........................................................................................................................................66
5. Commissioning.................................................................................................................................................... 68
Commissioning Checklist ............................................................................................................................68
Commissioning Steps..................................................................................................................................69
6. Menu Functions .................................................................................................................................................. 72
7. Fault Shutdown and Troubleshooting .............................................................................................................. 101
LED Status Panel Testing...........................................................................................................................101
LCD Fault and Troubleshooting.................................................................................................................101
8. Maintenance and Decommissioning of Inverters.............................................................................................110
Product Maintenance ...............................................................................................................................110
Uninstall the Inverter................................................................................................................................114
9. Accessories........................................................................................................................................................ 115
Fuse Bypass Terminals ..............................................................................................................................115
Shade Cover Kit (MTLSR-070551) .............................................................................................................117
10. Technical Data................................................................................................................................................... 120
Datasheet..................................................................................................................................................120
Measurement Tolerances.........................................................................................................................122
Production Graphs ....................................................................................................................................123
11. Appendix ........................................................................................................................................................... 131
Warranty and RMA Instructions ...............................................................................................................131
Datasheet..................................................................................................................................................131
Contact Information .................................................................................................................................131

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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.
https://solectria.com/support/inverter-registration

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Before You Start
This manual contains important information regarding installation and safe operation of the PVI 25TL-208 and the
PVI 50/60TL-480 and is intended for qualified personnel only. Qualified personnel having training, knowledge and
experience in:
•Installing electrical equipment and PV power systems (up to 1000VDC).
•Applying all local installation codes.
•Analyzing and eliminating the hazards involved in performing electrical work.
•Selecting and using Personal Protective Equipment (PPE).
Installation, commissioning, troubleshooting, and maintenance of the inverter must be done only by qualified
personnel. Be sure to read this manual carefully before using the inverter.
Thank you for choosing a Yaskawa Solectria Solar grid-tied PV inverter. This PV inverter is a high performance and
highly reliable product specifically designed for the North American Solar market.
If you encounter any problems during installation or operation of this unit, first check the user manual before
contacting your local dealer or supplier. This user manual is applicable for the following models: PVI 25TL-208, PVI
50TL-480 & PVI 60TL-480.
Instructions inside this user manual will help you solve most installation and operation difficulties. Contact your
local supplier if the problem still exists.
Please keep this user manual on hand for quick reference. Always check online for an
updated version of this product manual. The contents of this document are subject to
change without notice.

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1. Important Safety Instructions
SAVE THESE INSTRUCTIONS
This manual contains important instructions for models:
PVI 25TL-208
PVI 50TL-480
PVI 60TL-480
Please read this user manual carefully before installation of the inverter. Yaskawa Solectria Solar reserves the
right to refuse warranty claims for equipment damage if the user fails to install the product according to the
instructions in this manual. Failure to follow these instructions and other relevant safety procedures may result in
voiding of the product warranty and/or damage to the inverter or other property.
Hazard Symbols
DANGER
Indicates a hazardous situation, which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation, which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.
NOTICE!
Indicates a hazardous condition, which, if not avoided, could result in property damage.
INFO ✔
Indicates important supplementary information to use the product effectively.

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Symbols on Labels
Table 1-1 Explanation of Symbols on Labels
SYMBOL
DESCRIPTION
DC Signal
AC Signal
Equipment Ground
Phase
Off
On
Refer to Operating Instructions
Caution: Risk of Electric Shock
Do not remove cover until 5 minutes after disconnecting all supply sources
Caution: Risk of Electric Shock
Timed Discharge
Caution: Hot Surface
Do Not Touch
Warning: Hazardous voltage area under plastic cover. Do not open fuse holders under
load. Proper PPE must be used while accessing fuses. For continued protection against risk
of fire, replace only with same make and type of fuse.
Information: For more information, please see the installation and operations manual
General Safety Messages
DANGER
Electric Shock Hazard: Components with hazardous voltage and energy will electrocute operator. Operator shall
avoid touching live components with hazardous voltage and energy.

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Operator may contact components with hazardous voltage and energy. Use proper safety equipment including
Personal Protective Equipment (PPE) when de-energizing the unit. De-energize both the AC and DC power from
the unit, wait 5 minutes, and verify the absence of voltage before opening the equipment or removing any
protective shields.
WARNING
Unqualified Operator Hazard: Operator may cause a hazardous situation by making incorrect installation or
wiring connections. A qualified technician shall do all installation and wiring connections to comply with all local,
national, and country specific guidelines for safety.
Risk of electric shock and fire: Use only with PV modules that have a maximum system voltage of rating of
1000VDC or higher
Electrical Shock Hazard: The DC conductors of this photovoltaic system are normally ungrounded but will
become intermittently grounded without indication when the inverter performs the PV array isolation
measurement.
Chemicals Hazard: This product can expose you to chemicals including lead, known to the State of California to
cause cancer and
birth defects or other reproductive harm. For more information, go to
www.P65Warnings.ca.gov.
CAUTION
Heavy Lifting Hazard: Solectria PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 inverters weigh 56 kg (123.5 lbs).
The wiring box weighs 15 kg (33 lbs). Ensure the mounting bracket is properly installed prior to hanging the
inverter and wiring box on the bracket. A team of more than two is recommended to lift and place the inverter
and wiring box into position.
NOTICE!
General Damage to Equipment: Attempting to service the inverter improperly may result in damage. Contact
Yaskawa Solectria Solar Technical Support for maintenance.
Use as Intended: Solectria PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 inverters are designed for PV grid-tied
systems. The inverters are to be installed with floating or ungrounded PV arrays only.
INFO ✔
Read and Follow Instructions: Failure to read and follow instructions may void the warranty. Install the inverter
according to the instructions in this manual.
Grid Standard: Please check with the local electric utility supply company before selecting a grid standard. If the
inverter is operated with an incorrect grid standard, the electric utility supply company may cancel the

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interconnection agreement. Placing the inverter into operation before the overall system complies with the
national codes, rules and safety regulations of the application is not permitted.
If there is a fault; and it is safe to access the inverter:
1. Read/record the fault code(s) displayed on the LCD interface.
2. Turn OFF the inverter via the LCD/Keypad or Remote access.
3. Turn OFF the AC feed breaker.
4. Turn OFF the AC Switch.
5. If possible, read the DC MPPT currents displayed on the LCD interface:
a. If the MPPT current is <20A or the irradiation is obviously low, turn OFF the DC switch.
b. If it is safe to open the wiring box, proceed with troubleshooting procedures listed in Table 7-1. Make
sure appropriate safety precautions and PPE are used.
6. If it is not possible to read the DC MPPT currents through the LCD interface, and no fire, smoke, or voltage (AC
or DC) to ground is present in the enclosure:
a. Follow general safety practices including PPE to open the wiring box.
b. Measure the DC current on each string. If zero, open the fuse holder for each string reading
approximately zero amps.
c. If the DC current is >0.25A, do not open the fuse holder.
d. When all possible fuses are open, measure the total MPPT current. If it is <20A, turn OFF the DC switch.
e. If turning OFF the DC switch causes smoke, then (if safe) turn the DC switch back ON and wait until low
irradiance ~30min prior to sunset to continue troubleshooting.
If there is a fault and it is unsafe to access the inverter:
1. Notify someone else. Initiate emergency mitigation plan if necessary.
a. If smoke or fire exists, procure a fire extinguisher.
2. If a fire has escaped the inverter enclosure – call 911 immediately!
3. Turn OFF the AC feed breaker as soon as possible/safe.
4. If safe but conditions are deteriorating, consider:
a. Using the fire extinguisher.
b. Cutting the string conductors – one cable at a time with insulated cutters (while wearing appropriate
PPE).

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5. Monitor conditions until low irradiance ~30min prior to sunset. If safe, turn OFF AC and DC switches on the
inverter and proceed with normal troubleshooting procedures listed in Table 7-1.
2. Overview
Intended Use
The SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 are grid-tied, photovoltaic (PV), three-phase inverter,
suitable for use in commercial or utility-scale installations. The SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI
60TL-480 inverters are an integral part of a typical PV installation, which typically includes PV modules, DC power
distribution equipment, a PV inverter, and AC power distribution equipment. The SOLECTRIA PVI 25TL-208, PVI
50TL-480, and PVI 60TL-480 inverters convert solar power (DC) to AC power suitable for use in buildings and back
feeding onto the electrical grid. This inverter is a grid following inverter, which means it synchronizes the output
current with the voltage waveform of the grid. The SOLECTRIA PVI 25TL-208, PVI 50TL-480, AND PVI 60TL-480
inverters are an ideal product for use in rooftop, carport, or ground mount installations where quality and
performance are paramount.
The SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 inverters are not intended for use in a micro-grid or
off-grid application. Although successful integration into AC-coupled storage systems is possible, Yaskawa Solectria
Solar does not support or provide guidance for use in this type of application.
Figure 2-1 Grid-Tied PV System