Enphase EP200G101 Manuale utente

QUICK INSTALL GUIDE Model number: EP200G101-M240US00

Install the Enphase Enpower Smart Switch

To install the Enphase Enpower™ smart switch and the Enphase Enpower wall-mount bracket, read and follow all warnings and instructions in this guide and in

the Enphase Enpower Installation and Operation Manual at enphase.com/support. Safety warnings are listed on the back of this guide. These instructions are

not meant to be a complete explanation of how to design and install an energy storage system. All installations must comply with national and local electrical

codes and standards. Only qualied electricians shall install, troubleshoot, or replace the Enpower.

The Enphase Ensemble System includes the Enphase Enpower™ smart switch with Microgrid Interconnection Device (MID) capability, which

consolidates interconnection equipment into a single enclosure and streamlines grid-independent capabilities of PV and storage installations

by providing a consistent, pre-wired solution for residential applications. Along with MID functions, it includes PV, storage, and generator input

circuits.

For installing Enpower with 3rd party

PV inverter please refer to the planning

guide document on Enphase Energy

Storage System for third party PV

inverters online on Enphase website.

er, Installer Toolkit, Enlighten and other trademarks or service names are the trademarks of Enphase Energy, Inc. Data subject to change. Rev04-09-27-2021

Scenario 1:

Whole home backup with Enpower

as service entrance and PV combiner

connected to Enpower. This is the preferred

conguration for back up of the entire main

load panel. This conguration supports up

to an 60A breaker for the PV circuit and an

60A breaker for battery storage.

Scenario 2:

Whole home backup with Enpower

as service entrance and PV combiner

connected to main load panel. This is the

preferred conguration when you back up

the entire main load panel, and the size of

the PV combiner circuit is more than 60A. In

this conguration, the PV combiner circuit

connection space in Enpower is left vacant.

When existing PV combiner circuits are

connected to the main load panel, and you

want to add battery storage to the system,

you can keep the PV combiner connected

to the main load panel and connect only the

battery storage system to Enpower.

Scenario 3:

Partial home backup with main load panel

as service entrance and PV combiner

connected to Enpower. When PV circuits

breaker size is less than 60A, this is the

preferred conguration for partial home

backup with subpanel.

NOTE: The same installation scenarios

also apply to systems with legacy M-series

microinverters and Envoy-S Metered as

the communications gateway.

PREPARATION

A ) Inspect the packaging and the Enpower for damage. Do not install or

use the Enpower if it has been damaged in any way.

B ) Ensure that you have the following:

• One Enphase Enpower smart switch. The Enpower shipping box contains

an Enphase Enpower, mounting bracket, mounting hardware, and

literature kit (bag with labels and accessories: 150-00148). Among the

accessories are four-pin receptacles/dry contacts that will be used for

controlling external power relays.

* WARNING: The Enpower smart switch weighs 38.5 kg (85 lbs) and

will require two persons to lift the unit.

C ) Make sure you have the following required items:

• Enphase Encharge™ storage system, which is required for off-grid

applications.

• The Enphase Enpower requires a wireless connection to an Envoy,

which requires an Internet connection. Failure to maintain an Internet

connection may have an impact on the warranty. See enphase.com/

warranty for full terms and services.

• Wireless USB Adapter (COMMS-KIT-01) to be installed at Envoy for

communications with Encharge and Enpower. Includes USB cable

for connection to Envoy and allows wireless communication with

Encharge and Enpower.

• Two current transformers (CT-200-SPLIT) for consumption monitoring

• One current transformer (CT-200-SOLID) for production metering

• Enpower lifting handles (EP200G-HNDL-R1).

• Eaton BR Series breakers, rated maximum 60A for Encharge storage

system and Enphase IQ™ combiner.

• If breakers are required at the input or output to Enpower, use Eaton,

Type CSR breakers rated 100 A, 125 A, 150 A, 175 A or 200 A.

• Tools: conduit (with ttings and tting tools), drill, 5/32 inch pilot

bit (or metric equivalent), screwdriver, socket, wrench, adjustable

wrench, torque wrench, level, 5/32 inch Allen key (or metric equiva-

lent), conductor stripper, electrician’s hole saw (2 inch) kit or punch

set, and stud nder, if installing on studs.

• Conduit ttings (hubs) are required for all installations, and NEMA

Type 3 conduit ttings (hubs) are needed when installing out of doors

(one for each used conduit opening).

• Conduit ground hub rings.

NOTE: Conduit entry is allowed only through the bottom or bottom

sides of the unit.

• Three #10, 1/4”, or 5/16” lag bolts or screws, 7.6cm (three inches) long

(depending on attachment wall), for each wall-mount bracket. Check

with a structural engineer and local standards for local requirements.

• Washers for use between fastener heads and wall-mount bracket.

• Conductors rated at 75°C. For sizes, refer to the table on the unit

and to local codes.

• Over current protection: maximum in accordance with local standards.

• The door sheet metal is not required to be grounded, since it is

protected from live parts by other grounded metal and insulating

plastic materials, thus is considered unlikely to become energized.

INSTALLATION

Use the Enphase Installer Toolkit™ mobile app for iOS and Android devices.

It allows installers to congure the system while on site, eliminating the

need for a laptop and improving installation efciency.

NOTE: Only one Enpower can be commissioned in one system. Multiple

Enpowers can exist on the same site but they need to be in separate

systems, i.e. separate Enlighten/ITK activations.

Plan a location for the Enpower

The Enpower housing is NEMA type 3R and you can install it indoors or outdoors.

* WARNING: Protection against lightning and resulting voltage surge

must be in accordance with local standards.

A ) Follow all local codes and standards when planning for and installing

the Enphase Enpower Smart Switch.

B ) Choose a well-ventilated location where the ambient temperature

is within -40° C to 50° C (-40° F to 122° F), preferably out of direct

sunlight.

C ) Ensure that the mounting location can sustain the weight of the

Enpower and mounting bracket 38.5 kg (85 lbs). The wall must include

studs that can bear 38.5 kg (85 lbs) or can be of masonry or other

suitable structure that can bear the weight.

D ) Check the mounting location clearances:

• Indoors: at least 15cm (six inches) off the ground, 15cm (six inches)

from the ceiling, and 15cm (six inches) on

each side.

• Outdoors: at least 91cm (three

feet) off the ground and 15cm

(six inches) on each side.

E ) Ensure that there are no pipes or

electrical conductors where you

plan to drill.

F ) Plan to maintain at least 90cm

(three feet) of clearance in front

of the Enpower.

G ) Consider the dimensions of

the Enpower, easy access, unit

height, conduit entry, and length

of cable when selecting the

location.

H ) Select a location where you

can interconnect to the site’s

load center using the Enphase

Enpower.

Scenario 4:

Partial home backup with main load panel

as service entrance and PV combiner

connected to subpanel. This is the

preferred connection conguration for

partial home backup using a subpanel when

the PV circuit breaker size is more than

60A. The space available in Enpower for

combiner (solar) connection is left vacant.

width = 19.7 in.

36 in.

depth = 9.7 in.

Enpower dimensions

Install the wall-mount bracket

A ) Mark a plumb line over the wall stud as a guide.

* WARNING! Multiple risks. Make sure not to drill or attach into

electric wiring or pipes that are in the wall!

B ) Remove the wall mount bracket only from the shipping box.

C ) Place the wall-mount bracket on the wall so that the mounting holes in

the middle of the bracket align with the center of the stud. Use a level

to keep the bottom of the wall-mount bracket level.

D ) Use the #10, 1/4”, or 5/16” wood screws (or masonry attachments

if installing in masonry) to attach the bracket using one screw and

washer for each slot. The slot size of the Enpower wall mount bracket

is 8.5mm. Use an appropriately sized washer for each of the screws,

and check with a structural engineer and local standards for local

requirements.

E ) Verify that the wall-mount bracket is level, solidly attached to the wall,

and oriented for upright installation of the Enpower.

* WARNING! Risk of injury and equipment damage. Do not mount

an Enpower on a bracket that is not properly attached to a wall.

* WARNING! Risk of injury and equipment damage. Protect the

Enpower from impact damage and improper use.

D ) Repeat on the other side with the second handle.

* WARNING! Risk of injury and equipment damage. Two persons

are required to lift the Enpower.

E ) Use the lifting handles, take the

Enpower from the packaging,

making sure it is top side up

(upright). Enpower is designed

only for vertical installation

without inclination (must be

level).

F ) Lift the Enpower slightly

above the installed wall mount

bracket and allow it to slide

down so that the bracket facing hooks set into both the top and

bottom shelves of the wall mount bracket.

G ) Allow the Enpower to slide down until the Enpower is fully seated on

the wall-mount bracket shelf.

* WARNING! Risk of injury and equipment damage. Do not release

the Enpower until you ensure that the Enpower is fully seated in the

wall-mount bracket shelf.

H ) For each handle, pull the plunger tabs

to release them and remove the lift

handles.

I ) Reserve the handles for the next

installation.

J ) On the bottom handle mounts, use the

two provided partial-threaded custom

M6 screws to secure each side of the

Enpower and tighten to 0.5 N•m (4.4

lb•in) or less.

The threaded portion of the screw

engages with the bracket, while the un-

threaded portion of the screw engages

with the hole in the bracket to prevent

vertical movement of the bracket.

* WARNING! Risk of injury and

equipment damage. Do not skip this

step. Without these screws in place, the

Enpower may fall and cause injury or

damage if bumped or shaken.

K ) Use the four ller plates, provided in the

lit kit, to cover the screws.

Enpower

Wall Mount Bracket Align with stud

Bracket

shelf

8.5 mm mounting

slots

Attach handles

Bracket facing hooks

on back of the Enpower

Unbox and mount the Enpower on the wall

* WARNING: Risk of injury. Take care when lifting. The Enpower is

heavy 38.5 kg (85 lbs).

* WARNING! Risk of injury and equipment damage. Avoid dropping

the Enpower. Doing so may create a hazard, cause serious injury, and/

or damage the equipment.

A ) Remove the upper Enpower box, and locate the slots on both sides of

the Enpower enclosure.

B ) Locate the lifting handles (sold separately) and check that the

plungers are extended and ready to engage into the Enpower slots.

C ) Align one handle on one side of the Enpower and press the handle

into the slots, and slide the handle toward the top of the Enpower

enclosure until it clicks into place. Check that the handle is secure.

Install breakers as needed

The Enpower includes one two-pole 40A circuit breaker that feeds the

neutral forming transformer (NFT). You can install additional breakers,

if needed. You must follow all NEC and local electrical codes.

Install breakers as needed for the AC grid, main load, Enphase IQ Com-

biner, Enphase Encharge batteries, and generator. These breakers are not

included and must be ordered separately.

NOTE: You must install a backup loads breaker if required by local code.

* WARNING! Risk of injury and equipment damage. Use only the

breakers listed in this table.

List of allowed breakers and hold down kits:

Enphase Model No. Type and Eaton part no.

BRK-100A-2P-240V

BRK-125A-2P-240V

BRK-150A-2P-240V

BRK-175A-2P-240V

BRK-200A-2P-240V

BRK-20A-2P-240V-B

BRK-30A-2P-240V

BRK-40A-2P-240V

BRK-60A-2P-240V

EP200G-NA-HD-

200A

• Main Breaker, 2 pole, 100A, 25kAIC, CSR2100

• Main Breaker, 2 pole, 125A, 25kAIC, CSR2125N

• Main Breaker, 2 pole, 150A, 25kAIC, CSR2150N

• Main Breaker, 2 pole, 175A, 25kAIC, CSR2175N

• Main Breaker, 2 pole, 200A, 25kAIC, CSR2200N

• Circuit Breaker, 2 pole, 20A, 10kAIC, BR220B

• Circuit Breaker, 2 pole, 30A, 10kAIC, BR230B

• Circuit Breaker, 2 pole, 40A, 10kAIC, BR240B

• Circuit Breaker, 2 pole, 60A, 10kAIC, BR260

• Eaton type BR circuit breaker hold-down screw

kit, BRHDK125

Breaker installation positions are noted in the diagram.

Install breakers as needed continued

A ) Ensure that the Enpower is completely de-energized.

B ) Open the three latches that lock the enclosure door. To release the

latch, pull the latch handle forward and then to the right. With all the

latches opened, swing open the enclosure door.

* WARNING: Risk of equipment damage. Do not remove the

pre-installed solar shield attached to the enclosure door.

C ) Use a Phillips screw driver to loosen the six screws along the

periphery of the deadfront. Support the deadfront to keep it from

falling while performing the next step.

D ) While supporting the deadfront, use a screwdriver to disconnect the

deadfront ground wire from the grounding bar before the deadfront is

removed.

E ) Use the two tabs on the front to assist handling the deadfront during

the removal. Keep the deadfront and screws handy as you will need

them later.

* WARNING: Risk of electric shock. To maintain the warranty, do

not modify the deadfront other than to remove or replace ller plates,

as needed.

F ) If you install a main breaker or load breaker, remove the standard lugs

before installing the Eaton CSR breaker. By default, lugs are provided

in the Enpower unit for connection to the mains and to the load. In

case of usage without breakers, the conductors are connected directly

to these lugs. When breakers are used, the lugs are replaced with

breakers during installation.

G ) Remove a ller plate from the deadfront for each breaker position

you will use. Refer to the breaker position diagram to the left. To

remove the ller plate, press the two snaps inward while gently

pushing the ller plate out.

H ) For the Encharge, AC Combiner or Generator connection, snap the

appropriately sized BR series two-pole Eaton breaker onto the busbar,

using only the breaker positions indicated in the diagram on the door of

the unit. Breaker functional position are not interchangeable with one

another. The wires to be connected to each breaker are located beside

each breaker position. Remove the heatshrink cap on the wire ends

before inserting into the breaker.

4I ) Install each breaker by rocking it to the left, catching the clips that hold it

in place. Then rock the breaker to the right so it is fully seated and secure.

J) The generator breaker position can be used for the below purposes if

generator is unused:

1. Power the control transformer to enable the auxiliary contact load/

PV shedding feature

2. Connect the subpanel backup load breaker for <100A load subpanel.

You can connect the main breaker of the subpanel to this position,

since the load side lugs in Enpower do not support <100A breaker or

<1AWG wires.

Ensure you stick the “BACKUP LOADS” label from the load control kit, on

top of the “GENERATOR” embossing, on the Enpower deadfront.

K ) For the main load breaker, use an appropriately sized CSR Eaton

breaker. Install at the location

indicated in the diagram on

the door of the unit.

L ) Remove the mains/load lugs

by unscrewing the two nuts

holding the lugs. Re-use

the same nuts to x the

CSR breakers in the same

position. Torque to 4 N•m

(35.4 lb•in).

M ) Use the 8-32 screw (from the

lit kit marked 150-00148 that

ships with the Enpower) to

secure the mains breaker (not

the load breaker). Use a T20

drive to tighten the 8-32 screw

to 1.5 N•m (13.3 lb•in). Do not

use any other screw.

N ) Check that all breakers are

properly seated.

O ) Use the included stowed conductors, as labeled, to wire the circuit

breaker(s) for the Encharge batteries, Enphase Combiner, and generator,

as needed. The stowed conductors are provided with crimped-on ferrules

with end caps to prevent accidental contact. Remove the conductor end

caps as needed.

P ) Torque the breaker connections as listed in the following and in the

conductor table on the unit.

Q ) Purchase and install an Eaton type BR circuit breaker hold-down screw kit

(SKU: EP200G-NA-HD-200A) to secure only the Encharge and generator

double-pole circuit breaker(s).

Connections Wire size (AWG) Torque (N•m / lb•in)

Main lugs

Backup load lugs (use a 1/4” hex drive) Cu/AL: 300 KCMIL - 1 31.1 / 275

CSR breakers bottom wiring lugs Cu/AL: 300 KCMIL - 2 28.2 / 250

BR breakers (wire provided) 6 3.1 / 27

AC Combiner lugs,

Encharge lugs, and

Generator lugs

14 - 10

4 - 6

2 - 3

2.8 / 25

3.4 / 30

3.9 / 35

4.5 / 40

Neutral - large lugs (use a 3/8” hex drive) Cu/AL: 300 KCMIL - 6 31.1 / 275

Neutral and ground bars

Large holes (5/16-24 UNF) 1/0 - 3

4 - 6

10 -14

5.6 / 50

5.1 / 45

4.5 / 40

4.0 / 35

Small holes (10-32 UNF) 6 - 8

10 -14

2.8 / 25

1.7 / 15

Required practices when

torquing connections:

• Always follow NEC

2017 110.4 (D)

dictates.

• You must use a cali-

brated torque tool to

achieve the indicated

torque values.

• Use tamper-proof

torque mark/

paint after torquing

connections.

Ground wire

Load breaker

Encharge

breaker

AC Combiner

breaker

Generator

breaker

Mains breaker

Install 8-32

screw with 1.5

N•m torque

CSR breaker upper

lugs: 4 N•m torque

CSR breaker bottom

wiring lugs: 28.2 N•m

torque

Control PCBA & cover

Breaker spaces for auto

transformer, generator,

AC Combiner and

Encharge circuits

Eaton breaker

CSR2100N/2150N/200N

Two general purpose

relay I/O

A: Up to 80A to PV Combiner

B: Up to 80A to Encharge

C: Up to 200A to backup load panel

D: Up to 60A to generator

A B C D From utility meter or

main load panel

AC power wire

Generator I/O

Ground

Neutral

Main service disconnect

Eaton breaker

CSR2100N/2150N/22000N

200A main MID relay

Wire the eld connections

+ DANGER! Risk of electric shock. Check that all circuits connecting to the

Enpower are de-energized before wiring.

* WARNING! Do not install consumption CTs on the conductors above the

common busbar or on the main conductors below the main breaker if the

main breaker is used as service entrance. If the main breaker is the service

entrance breaker, you must install the CTs on the conductors directly above

the MID relay.

A ) Drill conduit entry holes as needed, and install conduit grounding lugs for each

opening. Be sure to reseal unused conduit entry holes with sealing plugs.

NOTE: Main supply conductors may enter the Enpower from the bottom or from

the bottom-left side. Backup load conductors may enter the Enpower from the

bottom or bottom-right side. Encharge, Combiner and generator conductors

may enter from the bottom, bottom-left or bottom-right sides.

B ) Size the conductors (Line, Neutral and Ground) depending on the breaker or

fuse, proper ampacity, and voltage rise requirements according to local codes.

Refer to the conductor rating table on the door of the Enpower.

C ) If the Enpower is not installed as service equipment1, you must remove the main

bonding jumper connected between the grounding bar and the neutral assem-

bly. Refer to the wiring diagram.

NOTE: Do not modify or rewire any of the other pre-installed wiring or bonding

connections in the Enpower.

D ) If Enpower is installed as service equipment1:

• Connect a grounding electrode conductor to the grounding bar.

• From the lit kit, place the label “GROUNDING ELECTRODE TERMINAL” adjacent

to the grounding bar.

• From the lit kit, place the label “SUITABLE FOR USE AS SERVICE EQUIPMENT”

/ “MAIN SERVICE DISCONNECT” on the deadfront near the main breaker/

service disconnect.

• If Enpower is not used as service equipment, these labels should not be used.

E ) Connect Lines, Neutral, and Ground. For details, refer to the conductor table on

the unit for sizes and refer to local codes.

* WARNING! Risk of equipment damage. Always connect to two Lines (ac-

tive), one neutral, and one ground.

F ) Connect the AC wires of Enphase Combiner, Encharge batteries,

and generator into the terminal lugs at the bottom of the

Enpower load center on the left.

* WARNING: Do not connect the AC wires directly into the

breakers. The AC wires go into the terminal lugs as shown in

the label.

G ) After all conductors are connected and secured, check that

there are no exposed conductors or stray wires.

H ) Gently arrange all the conductors and connectors inside the

cabinet.

+ DANGER! Risk of electric shock. The system is not ready

to be energized! Do not close any circuit breaker yet.

NOTE: The polarity of L1 and L2 is swapped inside Eaton CSR

series main breakers. Installers should follow L1 and L2 on the

following image when installing consumption CTs.

*The extra lug near the top right side of NFT (auto transformer) is a

manufacturing test terminal intentionally unpopulated with no end user

application.

Conduit guidance -

bottom entry Conduit guidance -

side entry

Set Up the Power Control System

The Enpower device, when used with Envoy and Production as well as Con-

sumption/PCS CTs, enables the Power Control System (PCS) functionality in

the Enphase Storage System.

The Enphase Storage System supports 2 PCS use cases:

• Import Only mode for Energy Storage System (ESS): Enphase Storage

System can import power from the Area Electric Power System (EPS)

for charging purposes but does not export active power from the ESS

to the Area EPS. The ESS mode of Import Only applies irrespective of

the congured battery smart prole, i.e., Self-Consumption, Full Backup,

or Savings (Time of Use) with optimization. The ESS Import Only mode

applies irrespective of whether the solar microinverters are IQ6/IQ7 or

M215/M250.

• Main Panel Upgrade (MPU) avoidance: In the partial home backup

scenario, the PCS limit the currents backfed into the main panel as

allowed by 2020 NEC article 705.13. This ensures that the main panel

complies with the NEC article 705.12.

NOTE: This use case is only supported with IQ Envoy and IQ6/7

series inverters.

This mode is applicable when the system is congured as in

Scenario 3 as described on page 1 of this QIG.

Device Supported SKU’s

1) PCS Controller (Envoy)

2) Current Transformers

3) Enpower Smart Switch

4) Encharge Storage

5) Microinverters

ENV-IQ-AM1-240, ENV-S-AM1-120

CT-200-SPLIT(needs 2 units)

CT-200-SOLID(included with the envoy)

EP200G101-M240US00

• ENCHARGE-3-1P-NA, ENCHARGE-10-1P-NA

• ENCHARGE-3T-1P-NA, ENCHARGE-10T-1P-NA

• IQ6 series (IQ6, IQ6Plus), IQ7 series(IQ7, IQ7A,

IQ7Plus, IQ7X, IQ7PD)

• M215 & M250 series

The National Electric Code(NEC) 2017 NEC 705.12(B)(2)(3)(b) allows

backfeed of current from solar/storage into the main panel subject to

the following limit

Backfeed allowed <= ((120% of busbar rating) – Ampacity of

the overcurrent protection device protecting the busbar )/

125%

Enphase, through its Installer Toolkit mobile app, also provides grid

proles that comply with PEL limits for various jurisdictions. In a

situation where both the PCS limit and a PEL prole are being used,

the maximum current backfed from the Enpower to the main panel is

always the lower of the PEL limit and the PCS limit.

NOTE: Import Only Mode for Energy Storage System is xed in

software and cannot be changed in the eld.

Conguring PCS In the Enphase Storage System

A ) Check that you have the following items. You must use the listed CTs

and Enphase IQ Envoy or the Envoy-S Metered with the Enpower and

Encharge for Power Control System functionality.

• Two current transformers (CT-200-SPLIT) for consumption/PCS

monitoring

• One current transformer (CT-200-SOLID) for production metering

(included with Envoy)

• IQ Envoy (ENV-IQ-AM1-240) or Envoy-S Metered (ENV-S-AM1-120):

The IQ Envoy can be standalone or integrated in an IQ Combiner box.

B ) Follow all instructions in the IQ Envoy or IQ Combiner Quick Install

Guide to ensure that CTs are installed and wired correctly with correct

polarity. Refer to the following diagram for the locations and polarity (arrow

on top of CT) on the CTs.

For whole home backup conguration, the CTs should be placed in the

same location (Production CT in combiner; PCS CT in Enpower) as shown

in the diagram PCS CT installation within Enpower.

C ) When being used for PCS, you must install the CT-200-SPLIT current

transformers inside the Enpower on the conductors above the MID relay.

The arrows on the Consumption/PCS CT must point towards the loads,

towards the busbar inside the Enpower or upwards, when the CTs are

installed above the MID relay. Refer to the image on the next page for the

Consumption/PCS CT location and wiring to the IQ Envoy.

D ) You must protect all PCS controlled busbars and/or conductors with

suitably rated overcurrent devices that are appropriately sized for the

busbar rating or conductor ampacity. Similar setup is required for a system

with M215 or M250 microinverters and an Envoy S metered. Refer to the

Envoy S metered or IQ Envoy/IQ Combiner QIG to see wiring details for

CTs.

E) You must indicate, with a label, the maximum current setting for back-

feed from Enpower that is controlled by PCS. Apply a label on the Enpower

deadfront indicating the maximum current setting for back-feed from En-

power that is controlled by PCS. An example of the required label is shown

as follows. Record the maximum operating amps value on the label.

For more details, refer to the Technical Brief

https://support.enphase.com/s/article/Technical-Brief-PCS-Integration-in-Enphase-Storage-System

THE MAXIMUM CURRENT BACKFED BY THIS SYSTEM TO THE MAIN

PANEL MAY BE CONTROLLED ELECTRONICALLY. REFER TO MANU-

FACTURER’S INSTRUCTIONS FOR MORE INFORMATION

PCS CONTROLLED CURRENT SETTING: ___________ AMPS

Encharge

AC Combiner

PCS CT installation within Enpower

Set Up the Power Control System (continued)

F ) For Production as well as Consumption/PCS CTs, you must apply the

following label to each CT when the system is congured to use PCS-based

current limiting.

The available space on the CTs for labeling is as follows.

Consumption/PCS CT (CT-200-SPLIT):

• Left side: 20mm(vertical) x 14mm(Horizontal)

• Back side: 20mm (vertical) x 20mm(Horizontal)

Production CT (CT-200-SOLID):

• 9mm(vertical) x 30mm(horizontal)

This sensor is part of a Power Control System. Do not re-

move or disable. Replace with same type and rating.

NOTE: The maximum operating currents in controlled busbars or

conductors are limited by the settings of the Power Control System

(PCS) and may be lower than the sum of the currents of the connected

controlled power sources. The settings of the PCS controlled currents

may be used for calculation of the design currents used in the relevant

sections of NEC Article 690 and 705.

* WARNING! Risk of electric shock and re. Only qualied personnel

are permitted to set or change the setting of the maximum operating

current of the PCS. The maximum PCS operating current setting shall

not exceed the busbar rating or conductor ampacity of any PCS con-

trolled busbar or conductor.

IQ Envoy Terminal Block

Relay contacts

(if needed)

white

blue

Not used

white

blue

Consumption CTs

The arrows must point

toward the load, away

from the grid.

P1 C1 C2

1 2 3 4 NO

Ref

Common

Digital Input Relay

PD, B300

OVC II

L1 L2

CU, 75C, 14AWG MIN

MEAS CAT III

OVC III Production | Consumption

G) PCS Export Limiting via ITK

PCS that ensures the Import Only mode for ESS is always running in the

system and the import only mode is not changeable. Energy storage

never exports to grid and therefore never backfeeds the main panel in a

partial backup scenario if consumption/PCS CTs are placed as outline

in section 6.

This section outlines how to congure current export limiting to limit PV

current when PV current exceeds the allowed backfeed/export.

The MPU avoidance use case of PCS can be enabled via ITK during

installation at Step 2 b) Site Conguration as shown in the gure below:

NOTE: The MPU avoidance use case requires conguration using the

Enphase installer toolkit version v3.0.8 or higher and Envoy software

version 6.1.32 or higher.

In the site conguration menu, the user can see 2 options:

• Select Backup Type

• PCS Export Limiting

As the MPU avoidance conguration can only be enabled in the partial

home backup mode, the installer has to rst select the ‘Partial Home

Backup’ conguration under ‘Select Backup Type’.

Then, in the ‘PCS Export Limiting’ section, the installer is required to

enter the type of micro-inverters (IQ7, IQ6) & the number of micro-invert-

ers of each type. Along with this, the installer adds information on the

rating of the main load panel busbar, the main service breaker rating &

can also set the PCS Controlled Export Current Limit. If this value is not

set, the system auto-calculates the export current limit based on the

2017 NEC.

Auxiliary Contact Connections

Enpower has three I/O ports. I/O-1 has two normally open auxiliary contacts

(NO1, NO2) and I/O-2 has two normally close auxiliary contacts (NC1, NC2)

for load and excess PV control; each auxiliary contact has two terminals.

Gen-I/O has one normally open auxiliary contact (NO3) for generator control,

and this contact has three terminals. All the auxiliary contact relays are rated

for pilot duty at 24Vac/Vdc (nominal) and 1 Amp.

A. Auxiliary Contact connections for shedding excess PV and load

For making the connections you would need the following components: a

denite purpose contactor, control transformer, and fuse.

For recommendations please refer the tech brief

https://support.enphase.com/s/article/Load-and-Solar-Circuit-Control-using-Enpower-Auxiliary-Contacts

Steps for connecting auxiliary contact for shedding excess PV or load:

1. Use wires sized per local code requirements taking into consideration

the voltage drop/rise and upstream breaker or fuse.

2. Connect one of the primaries of the control transformer to 120V

breaker, and the other wire to the neutral bus in the backup load panel

via an OCPD such as an inline fuse.

3. Connect one wire of the secondary of the control transformer to one of

the terminals of either NO/NC auxiliary contact from I/O-1 or I/O-2 on

Enpower.

4. Connect the other terminal of the auxiliary contact to the 24Vac coil

terminal (usually named A1) of the denite purpose contactor.

5. Connect the other terminal of the contactor coil (usually named A2) to

the other wire of the secondary of the control transformer.

6. For shedding excess load:

a. Connect the L1 (and L2 if 240V) terminal of the denite purpose

contactor to the backup load panel protected by a breaker.

b. Connect the T1 (and T2 if 240V) terminal of the contactor to the

excess load circuit that needs to be shed.

7. For shedding excess PV:

a. Connect the L1 and L2 terminals of the denite purpose contactor to

the OCPD (e.g., breaker in the AC combiner) protecting the inverter

output circuit of the excess PV to be shed.

b. Connect the T1 and T2 terminals of the denite purpose contactor to

the inverter output circuit of excess PV that needs to be shed.

Line diagram for auxiliary contact connections image shows NO1 is used

to shed excess loads and NO2 is used to shed excess PV. See our techni-

cal brief, Load and Solar Circuit Control using Enpower Auxiliary Contacts

(https://support.enphase.com/s/article/Load-and-Solar-Circuit-Control-using-Enpower-Auxiliary-Contacts),

for detailed line diagram and other details.

B. Securing Auxiliary Contact to Enpower

Ensure you have the feed-through headers that are shipped with the Enpow-

er as part of the lit kit.

Follow the below steps to secure the headers to Enpower, as shown in Feed

through headers for I/O-1 and I/O-2 image.

1. Insert the wires from the transformer controller and the external

contactor into the feed through header.

NOTE: Supports AWG 28 to AWG 16 wire sizes

2. Tighten the screws on the top (torque 0.22Nm to 0.25Nm) to secure

the wires.

3. Insert the feed through header into the I/O-1 or I/O-2 ports on Enpower.

4. Tighten the screws on the side to secure the feed through header to

the I/O-1 or I/O-2 ports on Enpower.

Follow same procedure for Generator dry contact connections (There are 3

terminals on the Gen-I/O port as shown in Feed thorugh header for genera-

tor I/O image. Use the rst and third terminal for wiring.)

Auxiliary contacts In Enpower

Line diagram for auxiliary contact connections used for shedding excess load and PV.

Feed through headers for I/O-1 and I/O-2

Feed through header for generator I/O

2. Tighten these screws to

hold the wires in place

3. Insert into I/O port on En-

power in this orientation

1. Insert wires here

4. Tighten these screws to se-

cure the feed-through header

to the I/O ports on Enpower

Insert wires in these terminals

Generator Connections

A generator can be integrated with the Enphase Storage system without the

need for any external ATS. It supports both manual and auto-start genera-

tors.

NOTE: This system is only compatible with permanently installed generators

that are non-separately derived as per NEC 250.35(B).

Steps for connecting a generator are listed below:

A ) Wire the L1 and L2 AC wires from the generator into the generator lugs

on the Enpower.

B ) Ensure that the ground terminal of the generator is connected to the

ground bar inside Enpower. Size the generator’s equipment grounding con-

ductor as per NEC 250.122 and generator manufacturer’s instructions.

C ) Connect the neutral wire from generator to an appropriately sized posi-

tion on the neutral bar inside Enpower.

NOTE: Enpower does not switch the neutral and the ground from the gen-

erator. It only switches the feeders i.e., L1 and L2. Therefore, the generator

needs to be congured as a non-separately derived system.

D ) Buy and install an appropriately sized breaker for the generator on the

Enpower’s busbar and connect the L1 and L2 generator cables from Enpow-

er’s ATS board to this breaker.

NOTE: The maximum allowed breaker size is 60A. Select an Eaton BR

breaker model that has the hole for the additional fastener as per NEC

480.36(D). Available models: BR220B, BR230B, BR240B, BR250B. Eaton

breaker BR260 already has the hole.

E ) Purchase and install a hold-down screw kit (SKU: EP200G-NA-HD-200A)

to secure the Generator breaker.

F ) Install a pair of generator CTs (CT-200-SPLIT) for L1 and L2 at the En-

power’s Generator input terminal for power monitoring when the generator

is running. Detailed CT wiring is described in step 9.

G ) Use Enphase Installer Toolkit mobile application to commission and

program Enpower to control the generator.

H ) For 2-wire autostart generators, wire the Generator I/O port in Enpower

to the 2-wire remote start terminals of the generator. Refer Step 7 for steps

on how to secure the auxiliary contacts to Enpower. Follow local code

requirements for wire sizing.

I ) Autostart generators typically require a constant 120 Vac for battery

charger. This power can be drawn from the backup loads panel protected by

a breaker so that it is powered even during an outage.

J ) For autostart generators, have a certied contractor install the gas line

required to supply the unit.

K ) Some utility-sense based generators like the Generac Eco-Gen come

with the capability to auto start generators when system goes off grid by

sensing the absence of the 240V utility power. For such utility-sense based

remote start generators, install the utility sensing generator start/stop

control circuit. Wire the primary of a 120V/12V power supply to the backup

loads panel. Connect the secondary to the Generator auxiliary contact relay

on the Enpower. Wire the other end of the relay to the coil of the Normally

Close contactor. Connect the contactor to 240V from the backup loads

panel for utility sensing. Wire the other end of the contactor to the Generator

through a fuse.

For more details, refer to the Technical Brief

https://support.enphase.com/s/article/Generator-with-Enphase-storage

Line diagram for 2-wire remote start generator connection

Line diagram for utility sense based remote start generator connection

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