Enphase Ensemble Technology System Planning Tech Brief

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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

Table of Contents ............................................................................................................................................. 1

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

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

Ensemble Technology Systems Common Configurations .............................................................................. 2

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

Non-backup Configuration - Installing Ensemble without Enpower .................................................................... 5

Use Cases and Sizing ....................................................................................................................................... 5

Load Analysis ................................................................................................................................................. 5

Backup Use Case ........................................................................................................................................... 5

IQ Microinverter PV System to Encharge Pairing ............................................................................................. 6

Self Consumption Use Case ........................................................................................................................... 7

Economic Use Cases ...................................................................................................................................... 7

Ensemble Products .......................................................................................................................................... 8

Enpower Smart Switch .................................................................................................................................... 8

Encharge Storage System .............................................................................................................................10

Wireless Communication Kit ...........................................................................................................................10

Key Planning Considerations ..........................................................................................................................11

Physical Installation Considerations ................................................................................................................11

Temperature Considerations ..........................................................................................................................11

Electrical Installation Requirements ................................................................................................................11

Voltage Regulation Considerations .................................................................................................................12

Rapid Shutdown Considerations.....................................................................................................................12

Glossary ..........................................................................................................................................................13

Summary of content (15 pages)

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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 Table of Contents ............................................................................................................................................. 1 Overview ......................................................................................................
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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 Figure 1: Microgrid system components based on 2017 NEC 690 and 705 Backup Configurations Ensemble technology system flexibility enables many backup configurations for different customer goals and needs. There are two common configurations that allow the Encharge storage system to provide power to customer loads independent of the grid.
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Planning an Ensemble Technology System – North America Partial Home (subpanel) Backup – Enpower smart switch and a backup subpanel installed on 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 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. When installed in this configuration, 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 Sizing Encharge storage system for whole home (main panel) backup For whole home backup, when an Enpower smart switch is installed on the line-side of the main load panel, at minimum, the greater of a) two Encharge 10 units or b) 67% of PV AC nameplate rating is recommended.
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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 Key Planning Considerations To ensure best wireless and power line communication between Ensemble system products and cleanest installation, consider the following: 1. Identify a suitable environment, for temperature and enclosure ratings, and wall area, for secure mounting of the weight, of the required number of Encharge storage system and Enpower smart switch. 2.
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Planning an Ensemble Technology System – North America Current Transformers (CTs) It is critical that installers correctly configure the IQ 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 Wh Circuit breaker Current Transformer(CT) Autotransformer Energy Meter Genset Fuse Battery module Inverter NO Contactor/Relay PV Module Switch/Disconnect Production CT includes all Line 1 conductors. IQ6 or IQ7 Micros Encharge 10 with NEMA 3R rating. PV rapid shutdown initiatiation device or AC disconnect may be required per local codes.
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Planning an Ensemble Technology System – North America Wh Mobile Connect Envoy IQ Combiner 3CE Wireless Comms PV Module Encharge 10 Genset NO Contactor/Relay Backup Load Center Encharge AC Combiner Generator Auto Transformer Enpower 200G Main Load Center IQ6 or IQ7 Micros Production CT includes all Line 1 conductors. Wh Utility Meter PV rapid shutdown initiatiation device or AC disconnect may be required per local codes.