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TECHNICAL BRIEF - North America

Planning an Enphase Ensemble Energy Management

Technology System

Table of Contents

Planning an Enphase Ensemble Energy Management Technology System ....................................... 1

Overview ................................................................................................................................................... 2

Ensemble Technology System Overview .............................................................................................. 2

Ensemble Technology Systems Common Configurations ................................................................. 3

Backup Configurations ........................................................................................................................... 3

Non-backup Configuration - Installing Ensemble without Enpower ....................................................... 8

Use Cases and Sizing ............................................................................................................................. 9

Load Analysis ......................................................................................................................................... 9

Backup Use Case .................................................................................................................................. 9

IQ Microinverter PV System to Encharge Pairing ................................................................................ 10

M-Series Microinverter PV System to Encharge Pairing ..................................................................... 10

Self-Consumption Use Case ............................................................................................................... 11

Economic Use Cases........................................................................................................................... 11

Smart Profiles ...................................................................................................................................... 11

Ensemble Products ............................................................................................................................... 12

Enpower Smart Switch......................................................................................................................... 12

Encharge Storage System ................................................................................................................... 14

IQ Combiner or IQ Envoy standalone For IQ-Series Microinverters ................................................... 14

Envoy-S Metered For M-Series Microinverters ................................................................................... 15

Ensemble Communications Kit ............................................................................................................ 15

M-Series Microinverters Replacements ............................................................................................... 16

Component List .................................................................................................................................... 16

Key Planning Considerations .............................................................................................................. 19

Physical Installation Considerations .................................................................................................... 19

Temperature Considerations ................................................................................................................ 20

Electrical Installation Requirements ..................................................................................................... 20

Voltage Regulation Considerations ...................................................................................................... 21

Rapid Shutdown Considerations ......................................................................................................... 21

Glossary ................................................................................................................................................. 22

Appendix A – Single line diagrams for IQ-Series systems ............................................................... 23

Whole home backup configuration ...................................................................................................... 23

Partial home backup configuration ...................................................................................................... 24

Partial home backup configuration, split system with additional consumption CTs ............................. 25

Partial home backup configuration, split system with NO additional consumption CTs ...................... 26

Encharge only configuration ................................................................................................................ 27

Appendix B – Single line diagrams for M-Series systems ................................................................ 28

Whole home backup configuration ...................................................................................................... 28

Partial home backup configuration ...................................................................................................... 29

Partial home backup configuration, split system with NO additional consumption CTs ...................... 30

Encharge only configuration ................................................................................................................ 31

Summary of content (31 pages)

PAGE 1
TECHNICAL BRIEF - North America Planning an Enphase Ensemble Energy Management Technology System Table of Contents Planning an Enphase Ensemble Energy Management Technology System ....................................... 1 Overview ................................................................................................................................................... 2 Ensemble Technology System Overview ..............................................................................................
PAGE 2
Planning an Ensemble Technology System – North America Overview This document provides site surveyors and design engineers with the information required to evaluate a site and plan the installation of the Enphase Ensemble™ energy management technology system. The information provided in this document supplements the information in the data sheets, quick install guides, and product manuals. Diagrams and information in this document are illustrative of example system configurations and installations.
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Planning an Ensemble Technology System – North America Note: The IQ Envoy will not communicate with M-Series microinverters and M-Series microinverters will not communicate with the IQ Envoy. • Enphase Consumption CTs enable home energy consumption monitoring and are required for Ensemble to operate correctly. Ensemble Technology Systems Common Configurations Regulatory Background – National Electrical Code Grid-tied only PV inverters are required to shut down in the event of a utility grid power outage.
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Planning an Ensemble Technology System – North America Figure 2: Always-On Ensemble technology system with whole-home (main load panel) backup for IQ-Series PV microinverters. The Enpower smart switch is installed on the line-side of the main load panel, and PV and Encharge storage system are interconnected into the Enpower smart switch. Figure 3: Always-On Ensemble technology system with whole-home (main load panel) backup for M-Series PV microinverters.
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Planning an Ensemble Technology System – North America Partial Home (Subpanel) Backup – Enpower Smart Switch and a Backup Subpanel Installed on the Load Side of the Main Load Panel The Enpower smart switch can also be installed on the load side of the exiting main load panel or service equipment. This configuration can be used when the Ensemble technology system is configured to provide backup to a number of pre-selected load circuits.
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Planning an Ensemble Technology System – North America Split Enphase Systems on a Single Site If the total PV system size exceeds what can be supported by the total Encharge system size, it is necessary to “split” the PV systems into a microgrid, and a non-microgrid PV system, each with their own Envoy.
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Planning an Ensemble Technology System – North America Split systems that do NOT require additional Consumption CTs For systems where the non-microgrid PV system is interconnected on the utility side of the primary microgrid Envoy’s Consumption CTs, NO additional Consumption CTs are needed. See Figure 7 for this configuration. Figure 7: “Split” PV system that does NOT require an additional set of Consumption CTs M-Series microinverter systems support similar configurations for “split” PV systems.
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Planning an Ensemble Technology System – North America Non-backup Configuration - Installing Ensemble without Enpower The Encharge storage system can be added to an existing system without using an Enpower smart switch, however, it will not provide backup power. When installed in this configuration, the Encharge storage system is treated as a distributed energy resource (DER), equivalent to a PV system, and cannot form an intentional island.
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Planning an Ensemble Technology System – North America Use Cases and Sizing Load Analysis The first step in correctly sizing a system is a proper load analysis. If an Envoy with correctly configured consumption CTs is already installed at a site, you can use data from Enlighten to properly size the system. A site survey, electric bills, and third-party consumption meters can also provide useful load data for system sizing.
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Planning an Ensemble Technology System – North America IQ Microinverter PV System to Encharge Pairing The following table identifies the maximum number of microinverters that can be connected to a given Encharge storage system size. Maximum PV system output power cannot be greater than 150% of the total Encharge storage system power capacity to ensure stable system operation.
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Planning an Ensemble Technology System – North America Self-Consumption Use Case In Self Consumption scenarios, a homeowner’s PV system generation is stored in the Encharge storage system for use later in the day when there is not sufficient power from Solar PV to supply the home loads. Homeowners benefit by consuming the onsite-generated energy themselves instead of exporting it to the grid during the day and purchasing power from the grid during evening and night times.
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Planning an Ensemble Technology System – North America Ensemble Products Enpower Smart Switch The Enphase Enpower smart switch consolidates interconnection equipment into a single enclosure and streamlines grid-independent capabilities of PV and storage distributed energy resources (DER) installations by providing a consistent, prewired solution for residential applications.
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Planning an Ensemble Technology System – North America Load Breaker Installed in the Enpower Smart Switch If there is an existing service equipment such as an existing fusible disconnect on the line-side of Enpower, a main breaker may not be required on the line-side input of Enpower smart switch. However, a load breaker may still be required. Size the load breaker with the same rating as the system over current protection device for the whole-home (main panel) backup configuration.
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Planning an Ensemble Technology System – North America Encharge Storage System The Enphase Encharge 3 and Encharge 10 storage system units are reliable, smart, simple, and safe. They provide the lowest lifetime energy costs with backup for both new and retrofit solar customers. As an installer, you can quickly design the right system size to meet the needs of the homeowner. Each Encharge consists of a mounting bracket, battery unit with disconnecting means, and cosmetic cover.
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Planning an Ensemble Technology System – North America The IQ Combiner 3-ES and the IQ Combiner 3C-ES include the consumption CTs. However, if using an existing IQ Envoy or IQ Combiner on a site that does not have the consumption CTs, a pair of consumption CTs (CT-200-SPLIT) must be procured and installed. The IQ Combiner 3C-ES includes a cellular modem, so an Ensemble Communications Kit without a cellular modem (i.e.
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Planning an Ensemble Technology System – North America M-Series Microinverters Replacements Enphase provides M-Series RMA SKUs based in the IQ7 hardware platform to replace M-Series microinverters that have failed or to expand an existing M-Series site. Note that you cannot mix IQ6- and IQ7-Series microinverters SKUs with M-Series microinverters at a site. You can only use the SKUs provided below with M-Series microinverters at a site.
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Planning an Ensemble Technology System – North America Component Microgrid Interconnection Device (MID) Enpower: EP200G101-M240US00 1 1 1 Retrofit Enphase NonIQ6/7 and NonM215/M250 System (Quantity) 1 Enpower Switch Main Breaker and/or Load Breaker Enpower Main Breakers: BRK-200A-2P-240V BRK-175A-2P-240V BRK-150A-2P-240V BRK-125A-2P-240V BRK-100A-2P-240V Enpower Circuit Breakers: BRK-20A-2P-240V-B BRK-30A-2P-240V BRK-40A-2P-240V BRK-50A-2P-240V BRK-60A-2P-240V BRK-80A-2P-240V Ensemble Communication
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Planning an Ensemble Technology System – North America Component PV Modules 18 Name (Model Number) New System (Quantity) Retrofit IQ System (Quantity) M215/M250 M-Series RMA SKUs: M215240-IQ7-S22-US M215240-IQ7-S25-US M250240-IQ7-S22-US M250240-IQ7-S25-US N/A N/A Any As needed per system design None needed unless expanding © 2020 Enphase Energy Inc. All rights reserved.
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Planning an Ensemble Technology System – North America Key Planning Considerations To ensure optimal wireless and power line communication between Ensemble system products and cleanest installation, consider the following: 1. Identify a suitable environment for temperature, enclosure ratings, and wall area, for secure mounting of the weight of the required Encharge storage system and Enpower smart switch units. 2.
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Planning an Ensemble Technology System – North America Figure 11: Bracket Spacing Bracket Spacing Dimension Description Recommended Minimum A Enpower and Encharge horizontal bracket spacing 152 mm (6”) B - Bottom aligned Enpower wall mount bracket bottom to Encharge wall mount bracket bottom Enpower wall mount bracket bottom to Encharge wall mount bracket bottom Enpower wall mount bracket bottom to Encharge wall mount bracket bottom Encharge wall horizontal bracket spacing 387 mm (15 1/4”) B - Ce
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Planning an Ensemble Technology System – North America Current Transformers (CTs) It is critical that installers correctly configure the Envoy, with the combined solar PV output passing through the production CT. The production CT monitors only the PV output circuit(s) and must not have Encharge battery circuit(s) installed on it. Install the Encharge battery circuit(s) on the load side of the production CTs on the correct terminals in Enpower smart switch.
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Planning an Ensemble Technology System – North America Glossary distributed energy resource (DER): A source of electric power that is not directly connected to a bulk power system. DER includes both generators and energy storage technologies capable of exporting active power to an EPS. An interconnection system or a supplemental DER device that is necessary for compliance with this standard is part of a DER.
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Planning an Ensemble Technology System – North America Appendix A – Single line diagrams for IQ-Series systems Whole home backup configuration 23 © 2020 Enphase Energy Inc. All rights reserved.
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Planning an Ensemble Technology System – North America Appendix B – Single line diagrams for M-Series systems (Download here) Whole home backup configuration 28 © 2020 Enphase Energy Inc. All rights reserved.