FCC ID: X3R-1500V DC/DC converter for use in Photovoltaic applications

Ampt String Optimizer V1500 Series Installation Manual 57070012-1 v20180705 hdpv.org Copyright 2018 Ampt, LLC. All rights reserved. 2 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Copyright 2018 Ampt, LLC. All rights reserved. No part of this document may be reproduced, retransmitted, or copied in any form without the expressed and written permission of Ampt, LLC. This document contains information needed to install and commission an Ampt optimizer

(including Smart String Technology optimizers, String Stretch optimizers, Ampt Mode optimizers, String View optimizers, V-match optimizers, I-match optimizers, Direct-to-

Battery optimizers, and Direct-to-Converter optimizers) within a photovoltaic (PV) installation. U.S. and international patents apply to this product. For details visit:

www.ampt.com/patents. Read This First To help avoid problems during the system installation, familiarize yourself in advance with the installation process by reading this entire document before starting the installation. Risk of electric shock, do not remove covers. No user serviceable parts inside. Refer servicing to qualified service personnel. When the photovoltaic array is exposed to light, it supplies a dc voltage to this equipment. Le risqu de dcharge lectirque nenlnvent pas la couverture. Aucunes pieces utiles dutilisateur lintrieur. Rfrez-vous lentretien au personnel de service qualifi. Quand la range photovoltaque est expose la lumire. Il fournit une tension CC cet quipement. Hot surfaces to reduce the risk of burns do not touch. Les surfaces chaudes - pour rduire le risque de brlures - ne se touchent pas. IMPORTANT SAFETY INSTRUCTIONS This manual contains important instructions for Ampt optimizers that shall be followed during installation and maintenance. The optimizer has been designed and tested according to international safety requirements, but requires certain precautions are observed when installing and/or operating the optimizer. To reduce the risk of personal injury and to ensure the safe installation and operation of the optimizer, please be sure you carefully read and follow all instructions and safety messages in this manual. SAVE THESE INSTRUCTIONS Copyright 2018 Ampt, LLC. All rights reserved. 3 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Safety Message Types The following messaging is used to identify a hazard to equipment or personnel:

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 information considered important but not hazard, or personal injury, related - for example, property damage. General Safety Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. All electrical installations must be done in accordance with the local and National Electrical Code ANSI/NFPA 70; Canadian Electrical Code, Part I; or the applicable standards, codes, and regulations for your region. The Ampt product contains no user-serviceable parts. All repairs and maintenance should be handled in accordance with the instructions and terms contained in the product warranty. Before installing or using the Ampt optimizer, read all instructions and safety messages on the optimizer and in this manual. Follow the safety precautions for this product as well as the other components in the PV system. PV modules produce electrical energy when exposed to light and thus can create an electrical shock hazard. Wiring of the PV modules should only be performed by qualified personnel. Copyright 2018 Ampt, LLC. All rights reserved. 4 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Disclaimer of Liability Ampt makes no representations, expressed or implied, that with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Ampt shall not be liable for any indirect, incidental, or consequential damages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.) The following information is subject to change without notice, even though every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that Ampt reserves the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material. WARNING Any use of the Ampt String Optimizer that is not expressly authorized in this manual or associated documentation is expressly prohibited by Ampt. Ampt disclaims any responsibility or liability for such prohibited use. Copyright 2018 Ampt, LLC. All rights reserved. 5 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Table of Contents Read This First .............................................................................................................................. 3 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 3 Safety Message Types ............................................................................................................................. 4 General Safety ........................................................................................................................................ 4 Disclaimer of Liability.............................................................................................................................. 5 Chapter 1: Product Overview ............................................................................................... 9 General Description ...................................................................................................................... 9 Dimensional Drawings ................................................................................................................ 11 Physical Overview ...................................................................................................................... 12 Bar Code Label............................................................................................................................ 12 Specifications ............................................................................................................................. 13 Chapter 2: Planning Installation ......................................................................................... 15 Overview .................................................................................................................................... 15 Inputs ......................................................................................................................................... 15 Acceptable Input Configurations ........................................................................................................... 15 Acceptable Input Configurations Between Parallel Optimizers .............................................................. 15 Electrical Connections ................................................................................................................ 16 Ungrounded PV Systems....................................................................................................................... 16 Resistively Grounded PV Systems (positive or negative) ........................................................................ 16 Fuse Sizes ............................................................................................................................................. 16 DC-coupled Storage .............................................................................................................................. 17 Inter-row Shading Wiring Example ........................................................................................................ 17 Cabling Connectors ..................................................................................................................... 18 Chapter 3: Installing the Ampt String Optimizer ................................................................ 19 Getting Started ........................................................................................................................... 19 Parts and Tools Needed ........................................................................................................................ 19 Mounting and Grounding the String Optimizer .......................................................................... 20 Steps .................................................................................................................................................... 20 Making Electrical Connections .................................................................................................... 21 Steps .................................................................................................................................................... 22 Verifying Electrical Connections ................................................................................................. 25 Before Connecting the Optimizer Output in parallel to other circuits:.................................................... 25 Verify Operational Currents and/or Output Power ................................................................................ 25 Uninstalling an Optimizer ........................................................................................................... 26 Steps .................................................................................................................................................... 26 Copyright 2018 Ampt, LLC. All rights reserved. 7 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Unexpected Current Detected .................................................................................................... 27 What this means .................................................................................................................................. 27 Steps .................................................................................................................................................... 27 Appendix ............................................................................................................................ 29 Compliance ................................................................................................................................. 29 Model Numbering System .................................................................................................................... 29 Markings .............................................................................................................................................. 30 FCC Compliance ................................................................................................................................... 31 RSS-GEN ............................................................................................................................................... 31 Avis IC .................................................................................................................................................. 32 RSS-GEN ............................................................................................................................................... 32 Contacts ...................................................................................................................................... 33 Copyright 2018 Ampt, LLC. All rights reserved. 8 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Chapter 1:

Product Overview General Description Ampt String Optimizers are DC/DC converters with multiple features that lower the cost and improve the performance of new and existing PV systems. Dual MPPT per optimizer - Ampt String Optimizers put maximum power point tracking on each of its two input strings of PV modules. This mitigates or eliminates mismatch losses to deliver more energy under changing environmental and system conditions over the lifetime of the power plant. String Stretch Ampt's patented String Stretch technology puts voltage and current limits on the output of each optimizer which doubles the number of modules per string and allows for smaller conductor sizing per kilowatt delivered to save up to 50% on electrical BOS costs. Ampt Mode Inverters with Ampt Mode operate in a narrow input voltage range that is closer to the maximum system voltage. This allows the inverter to deliver a higher AC output voltage at the same current which raises the rated output power of the inverter to lower the inverter's cost per watt. V-match Ampts patented V-match technology allows the output of our optimizers to match the DC bus voltage set by the inverter or battery while delivering full available power from the PV modules. This uniquely allows PV arrays with Ampt to automatically adapt to legacy or future power equipment to repower existing systems, upgrade inverters, deploy optimized DC-coupled storage systems, and other applications. I-match - Ampts patented I-match technology allows the PV array to automatically (or by command) match the desired current of the battery as determined by either the battery SoC or the EMS. Direct-to-Battery Ampt String Optimizers include power management technology for DC-coupled energy storage systems (ESS). Our Direct-to-Battery technology allows the optimizer, battery, and inverter to share the same DC bus without additional charging equipment dedicated to the battery. This feature enables storage systems with greater efficiency, flexibility, and scalability at a lower cost. Copyright 2018 Ampt, LLC. All rights reserved. 9 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Direct-to-Converter For DC-coupled energy storage systems, Ampt String Optimizers include Direct-to-Converter technology which allows the DC bus to operate at a higher fixed voltage. This increases the power density of both the battery charger and inverter to lower equipment cost per watt while increasing the solar+storage system efficiency. High DC/AC Ampts patented technology allows DC/AC ratios of 2:1 or more. This enables system owners to expand the DC power on existing systems without replacing inverters, combiners, or cables. It also opens design flexibility for new systems to optimize inverter utilization and cost per watt. Wireless Communication Ampt String Optimizers incorporate optional wireless communication to provide string-level data that is highly accurate, synchronous, and scalable to improve O&M, as well as enhanced controls for storage applications. For more information on Ampts product features and applications, visit www.ampt.com. Copyright 2018 Ampt, LLC. All rights reserved. 10 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Dimensional Drawings The dimensions for the String Optimizer shown below are in millimeters and inches. Figure 1: Dimensional drawings Copyright 2018 Ampt, LLC. All rights reserved. 11 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Physical Overview Mounting holes

(6.5 mm) x 6 Grounding stud

(10-32) x 2 Input 2 connectors

+ - + - + -

Input 1 connectors Output connectors Figure 2: Physical overview of the string optimizer Bar Code Label The image below shows the bar code label with model and serial numbers. Bar code label Figure 3: Bar code tag with the model and serial numbers Copyright 2018 Ampt, LLC. All rights reserved. 12 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Specifications Electrical Input V1500-12 V1500-16 V1350-20 V1500-20 12A model 16A model 20A models Maximum voltage per input 1 Maximum current per input 2 MPP tracking voltage range Number of inputs Output Output voltage range Maximum output current V A V V A Max continuous output power kWdc 1500 12.3 1500 12.3 1500 12.8 1500 12.8 400 1300 400 1300 400 1300 400 1300 2 2 2 2 0 1500 0 1500 0 1350 0 1500 12 16.8 16 22.4 20 25.2 20 28 Efficiency

(max, CEC, Euro) Mechanical Input & output connector Dimensions Weight Ambient temperature operating range Cooling Environmental Environmental category Pollution degree Maximum operating altitude 3 Overvoltage category Ingress protection General Maximum system voltage Compliance

%

99.6, 99.5, 99.4 Amphenol H4 13.46" x 8.66" x 3.94"

(342 mm x 220 mm x 100 mm) 13.6 lbs. (6.2 kg)

-40 F to + 167 F

(-40 C to +75 C) Convection Outdoor 2 9843 ft (3000 m) OVII IP 66/4X 1500 V ETL to UL 1741;

IEC 61000-6-1, 61000-6-3, 62109; CE;

Giteki 2-1-19; FCC Part 15, class A 1. Voc at coldest design temp. - follow Ampts design guidelines to determine the number of modules per input and max. system voltage. 2. Module Imp at standard test condition (STC) - irradiation level of 1000 W/m2 at 25C. 3. Optimizer derates above this altitude. Copyright 2018 Ampt, LLC. All rights reserved. 13 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Copyright 2018 Ampt, LLC. All rights reserved. 14 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Chapter 2:

Planning Installation Overview This chapter defines the acceptable criteria for input connections, describes the appropriate electrical connections based on the grounding configuration of your PV system, and explains the mating connector polarities for the inputs and output of the String Optimizer. Inputs This section defines the acceptable criteria for the two input connections of the Ampt String Optimizer. NOTICE The inputs of the optimizer are not intended for connection to a battery or any other type of DC source except PV modules. The following information applies to 60- or 72-cell c-Si/p-Si modules. If you are using another type of module (e.g. thin-film), please contact Ampt for configuration rules. Acceptable Input Configurations It is common for inputs 1 and 2 to have the same number of modules (i.e. In1 = In2). However, if the number of modules between inputs is different, the following conditions must be met for the optimizer to operate at MPP. Voc-cold-in1 Voc-cold-in2 Voc-cold-in1 1500V Vout/2< Vmpp-in1 < Vout Vout/2< Vmpp-in2 < Vout Voc-cold-in1 Inverter maximum input voltage 0.5xPin1 < Pin2 < Pin1 Acceptable Input Configurations Between Parallel Optimizers The number of modules on each input between parallel optimizers can vary within an array so long as they meet the criteria described in the Acceptable Input Configurations section. Copyright 2018 Ampt, LLC. All rights reserved. 15 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Electrical Connections The electrical connection of the String Optimizer is done after mounting and grounding the unit. Ungrounded PV Systems In2 In1 String Optimizer Figure 4: Electrical connections for an ungrounded PV system Resistively Grounded PV Systems (positive or negative) In2 In1 String Optimizer Figure 5: Electrical connections for a grounded PV system Fuse Sizes Inverter Inverter CAUTION Over-current protection devices and conductors shall be sized in accordance with the National Electrical Code (ANSI/NFPA 70); Canadian Electrical Code, Part I; or the applicable standards, codes, and regulations for your region. The output current limit of the Ampt String Optimizer eliminates the need for the 1.25 multiplication factor for over-sun conditions when calculating ampacity. The 1.25 multiplier for continuous use is still required. Optimizer Max Output Current (A) Minimum Fuse Size (A) 12 16 20 Copyright 2018 Ampt, LLC. All rights reserved. 16 15 20 25 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 DC-coupled Storage When used in DC-coupled storage applications, the optimizer does not function as a blocking diode. Inter-row Shading Wiring Example When inter-row shading is expected, the best practice is to wire the modules on the two inputs of the Ampt String Optimizer to be on the same row as shown below. Ampt String Optimizer not to scale to combiner Figure 6: Wiring example when inter-row shading is expected to combiner Copyright 2018 Ampt, LLC. All rights reserved. 17 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Cabling Connectors The figure below shows the mating connectors and polarities for the inputs and output of the String Optimizer. NOTICE Use only Amphenol H4 mating connectors. to combiner/inverter Figure 7: Mating connectors and associated polarity for the two inputs and the output of the String Optimizer Copyright 2018 Ampt, LLC. All rights reserved. 18 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Chapter 3:

Installing the Ampt String Optimizer Getting Started This chapter addresses the proper mounting and installation of the Ampt String Optimizer. Read the entire chapter before starting the procedures and then conduct each task in the order given. Parts and Tools Needed The mounting hardware varies by the type of PV module mounting rail. Amphenol H4 connector unlocking tool (Amphenol p/n: H4TR0000 or H4TU0000). Follow all safety practices when connecting and disconnecting PV connectors. General purpose anti-seize compound. Volt meter (rated for the PV systems maximum system voltage) with DC current clamp. Copyright 2018 Ampt, LLC. All rights reserved. 19 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Mounting and Grounding the String Optimizer WARNING Read the warning statements below:

Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. All electrical installations must be done in accordance with the local and National Electrical Code ANSI/NFPA 70; Canadian Electrical Code, Part I; or the applicable standards, codes, and regulations for your region. The Ampt optimizer is to be installed so that it is not expected to be contacted by persons. CAUTION Keep connectors dry and clean. Do not install Ampt String Optimizers in a location where they might be immersed in water. Steps 1. Mount the String Optimizer to the rack using the mounting holes provided. a. See Dimensional Drawings on page 11 b. The recommended practice is to mount the unit parallel to the PV modules with the connectors facing downward. c. Ensure sufficient spacing such that the safety icons as well as the serial and model numbers on the bar code label can be read by maintenance personnel. 2. Ground the String Optimizer as required by your local codes using one of the grounding studs provided, or with a listed bonding washer. Figure 8: Ampt String Optimizer mounted and grounded Copyright 2018 Ampt, LLC. All rights reserved. 20 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Making Electrical Connections WARNING Read the warning statements below:

Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. Do not make or break connections under load. Ensure that there are no parallel connections to the string while series connections are being made. Voltage may be present on the output terminals when an input terminal is connected. Voltage builds as modules are connected in series. CAUTION Read the caution statements below:

To reduce the risk of fire, connect the outputs of the Ampt equipment only to conductors with sufficient ampacity based on the maximum output fault current (maximum optimizer output current) for the chosen optimizer. Over-

current protection devices and conductors shall be sized in accordance with the National Electrical Code (ANSI/NFPA 70); Canadian Electrical Code, Part I; or the applicable standards, codes, and regulations for your region. Over current protection is required for the DC output circuit in the installation. Ampt recommends that a disconnect switch be included in the installation for the DC output. NOTICE Use only Amphenol H4 mating connectors. Copyright 2018 Ampt, LLC. All rights reserved. 21 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Steps NOTICE Per Canadian Electrical Code, the installer is required to mark the device with the following wording or equivalent, located on or adjacent to each wiring compartment giving access to high voltage circuits, only if actually connected to high voltage in the installation:

DANGER HIGH VOLTAGE or DANGER XXX V where XXX is replaced by the rated voltage. 1. Read the warning, caution, and notice statements above. 2. The instructions that follow assume the PV system is using combiner boxes. Ampt supports the use of collection harnesses and other schemes that do not allow for isolation of individual optimizer output circuits. Please contact Ampt Support for alternate instructions. 3. Ensure the String Optimizer is mounted and grounded. See Mounting and Grounding the String Optimizer on page 20. 4. Make sure you are familiar with the electrical connections for the String Optimizer in your system. See:

Electrical Connections on page 16. Cabling Connectors on page 18. 5. Ensure the output cables are appropriately terminated at the combiner box and not connected to any other circuits. 6. Connect the appropriate cables to the output (OUT) of the String Optimizer. Pay special attention to the voltage polarity and the connector gender of these cables as illustrated in Figure 9. See:

Electrical Connections on page 16. Cabling Connectors on page 18.

+

to combiner/inverter

-

Figure 9: Connecting the output connectors Copyright 2018 Ampt, LLC. All rights reserved. 22 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 7. Ensure the planned input connections meet the acceptable criteria. See Inputs on page 15. 8. Connect the modules in series for each input by following your procedures and safety protocols. 9. Validate the voltage and polarity of the modules in series as well as the connector gender before connecting them to inputs 1 and 2 by following your procedures and safety protocols. Figure 10: Polarity and gender for each input connector 10. Connect the series of modules for Input 2 to the String Optimizer. Figure 11: Connecting Input 2

+

-

to combiner/inverter 11. Connect the series of modules for Input 1 to the String Optimizer.

+

-

to combiner/inverter Figure 12: Connecting Input 1 Copyright 2018 Ampt, LLC. All rights reserved. 23 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 12. Ensure that the locking mechanisms on all connectors are fully engaged.

+

-

to combiner/inverter Figure 13: Verify that the connectors are fully engaged 13. Proceed to the next section and verify electrical connections. Copyright 2018 Ampt, LLC. All rights reserved. 24 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Verifying Electrical Connections WARNING Read the warning statements below:

Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. Do not make or break connections under load. NOTICE Because Ampt String Optimizers alter the I-V curve of the array, curve tracers are not recommended during commissioning. Before Connecting the Optimizer Output in parallel to other circuits:

1. Read the warning and notice statements above. 2. Verify the optimizer circuit is isolated and not under load by following your safety procedures and protocols. 3. Verify the output voltage and polarity of the String Optimizer by measuring the optimizer output string voltage at the combiner box by following your safety procedures and protocols. a. The measured output voltage should be the maximum of either:

i. The optimizers maximum output voltage. ii. The greater of the two input voltages. 4. Verify that there is zero current flowing through the optimizer circuit by using a current clamp on each wire connected to the optimizer. Individually test each wire connected to Input 1, Input 2, and the output. a. If current is detected on any of these cables, STOP and go immediately to the Unexpected Current Detected section on page 27. Verify Operational Currents and/or Output Power 1. Read the warning and notice statements above. 2. Because the String Optimizers effectively change strings from current sources to power sources, they deliver full power at a variety of voltages and currents. Therefore, both the output voltage and current must be known to validate output performance under load. There are two ways to validate performance:

a. If all optimizer output string voltages are the same, then the optimizer output string currents will be proportional to the sum of the optimizer input powers at the time of the measurement. Copyright 2018 Ampt, LLC. All rights reserved. 25 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 b. If the optimizer output string voltages are different at the time of measurement, then the optimizer output voltage x output current =

output power may be used to compare to the sum of the measured or predicted optimizer input powers. Using the Ampt CU with String Optimizers simplifies operational verification through wireless communication. See ampt.com for more information. Uninstalling an Optimizer WARNING Read the warning statements below:

Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. Do not perform any servicing other than that specified in these instructions. Do not make or break connections under load. Voltage may be present on the output terminals when an input terminal is connected. CAUTION Read that caution statements below:

The Ampt product contains no user-serviceable parts. All repairs and maintenance should be handled in accordance with the instructions and terms contained in the product warranty. The surface of the heat sink may be hot. Steps 1. Read the warning and caution statements above. 2. Ensure the String Optimizer is not under load by following your safety procedures and protocols. 3. Verify that there is zero current flowing through the optimizer circuit by using a current clamp on each wire connected to the optimizer. Individually test each wire connected to Input 1, Input 2, and the output. a. If current is detected on any of these cables, STOP and go immediately to the Unexpected Current Detected section on page 27. Copyright 2018 Ampt, LLC. All rights reserved. 26 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 4. If no current is detected, then use the Amphenol H4 connector unlocking tool to disconnect connectors in the following order:

a. Input 1 b. Input 2 c. Output (OUT) Unexpected Current Detected WARNING Read the warning statements below:

Installation and maintenance should be performed only by qualified persons. Installers and maintenance personnel assume the risk of all injury that might occur during installation or maintenance including, without limitation, the risk of electric shock. Follow your safety procedures and protocols. Do not make or break connections under load. Do not perform any servicing other than that specified in these instructions Voltage may be present on the output terminals when an input terminal is connected. CAUTION Read that caution statements below:

The Ampt product contains no user-serviceable parts. All repairs and maintenance should be handled in accordance with the instructions and terms contained in the product warranty. The surface of the heat sink may be hot. What this means If current is detected on either one of the inputs or the output when the String Optimizer is not under load, then this usually indicates that the optimizer has been connected improperly. Steps 1. Read the warning and caution statements above. 2. Wait for zero irradiance. Copyright 2018 Ampt, LLC. All rights reserved. 27 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 3. Before disconnecting, verify that there is zero current flowing through the optimizer circuit by using a current clamp on each wire connected to the optimizer. Individually test each wire connected to Input 1, Input 2, and the output. 4. If no current is detected, then use the Amphenol H4 connector unlocking tool to disconnect connectors in the following order:

a. Input 1 b. Input 2 c. Output (OUT) 5. Follow your safety procedures and protocols to verify that the gender of the connectors, the voltage polarities, and the cable routings match the Cabling Connectors section on page 18. 6. Follow the Making Electrical Connections procedure starting on page 21. Copyright 2018 Ampt, LLC. All rights reserved. 28 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Appendix Compliance The box is not meant to be user serviced or opened in any way.

***

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Model Numbering System The model numbers for Ampt String Optimizers are in the following format:

31570020-xxxx (20A models, ranging from 400 1500V) 31570021-xxxx (16A models, ranging from 400 1500V) 31570022-xxxx (12A models, ranging from 400 1500V) where xxxx equals voltage of the unit (e.g. -0750 is a V750; -1300 is V1300). Copyright 2018 Ampt, LLC. All rights reserved. 29 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Markings 12A model V1500-12 16A model V1500-16 20A models V1350-20 V1500-20 Ampt model number 31570022-1500 31570021-1500 31570020-1350 31570020-1500 Maximum voltage per input (Vdc) 1500 1500 1500 1500 Operating voltage range per input (Vdc) 400 1300 400 1300 400 1300 400 1300 Maximum current per input (Imp@STC) (Adc) Max PV short-circuit current per input (Adc) 12.3 13.3 12.3 13.3 12.8 13.3 12.8 13.3 Output voltage range (Vdc) 0 1500 0 1500 0 1350 0 1500 Maximum output current (Adc) Maximum continuous output power (kWdc) Ambient temperature operating range Enclosure type 12 16.8

-40C - 75C IP 66/4X 16 22.4

-40C - 75C IP 66/4X 20 25.2

-40C - 75C IP 66/4X 20 28

-40C - 75C IP 66/4X Copyright 2018 Ampt, LLC. All rights reserved. 30 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 FCC Compliance This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT! Changes or modifications not expressly approved by Ampt, LLC could void the users authority to operate the equipment. Model: 1500V FCC ID # X3R-1500V IC: 8399A-1500V

***

RSS-GEN This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas license-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. Copyright 2018 Ampt, LLC. All rights reserved. 31 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Avis IC Cet appareil est conforme la partie 15 des rgles de la FCC. Son fonctionnement est soumis aux deux conditions suivantes: (1) Ce dispositif ne peut causer des interfrences nuisibles, et (2) cet appareil doit accepter toute interfrence reue, y compris les interfrences qui peuvent provoquer un fonctionnement indsirable. IMPORTANT! Les changements ou modifications non expressment approuvs par Ampt, LLC pourraient annuler l'autorit de l'utilisateur utiliser l'quipement. Model: 1500V FCC ID # X3R-1500V IC: 8399A-1500V

***

RSS-GEN Lmetteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR dInnovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes:

1. Lappareil ne doit pas produire de brouillage. 2. Lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. Copyright 2018 Ampt, LLC. All rights reserved. 32 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Contacts Headquarters Ampt, LLC 4850 Innovation Drive Fort Collins, CO 80525 970-372-6950 Sales Global:

sales@ampt.com p:

f :

p:

f :

p:

f :

+1 970.372.6952

+1 970.225.0483

+49 7456 20 88 42

+49 7456 20 88 43

+81.45.565.9977

+81.45.565.9938 North America:

Europe:

Japan:

Support Global:

support@ampt.com North America:

Europe:

Japan:

p:

f :

p:

f :

p:

f :

+1 970.372.6951

+1 970.225.0483

+49 7456 20 88 42

+49 7456 20 88 43

+81.45.565.9977

+81.45.565.9938 Copyright 2018 Ampt, LLC. All rights reserved. 33 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705 Copyright 2018 Ampt, LLC. All rights reserved. 34 Ampt String Optimizer V1500 Series Installation Manual: 57070012-1 v20180705

1500V Photos - Internal PCBA Top PCBA Bottom

1500V Photos - External Unit Side 1 Unit Side 2 Unit Side 3 Unit Side 4 Unit Side 5 Unit Side 6