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  Q U I C K

  I N S T A L L  

G U I D E

 

(Model B270-1200-LN-I-EU00-RV0)

Installing the 

Enphase AC Battery

To install the Enphase

 

AC Battery™ and the Enphase Wall-Mount Bracket, read and follow all warnings and instructions in this guide and in the 

Enphase AC 

Battery 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 qualified electricians shall install, troubleshoot, or replace the AC Battery.

The Enphase Storage System includes the 

Enphase AC Battery with integrated Enphase 

Microinverter™. The system uses the Enphase 

Envoy-S Metered™ to measure PV production and 

home energy consumption. The system knows 

when it is optimal to charge or discharge battery 

power so that energy is stored when it is abundant 

and used when scarce.

Enphase Customer Support:

 enphase.com/global/support/contact

Safety and Advisory Symbols

+

DANGER

: This indicates a hazardous situation, which if not avoided, will 

result in death or serious injury.

*

WARNING

: This indicates a situation where failure to follow instructions 

may be a safety hazard or cause equipment malfunction. Use extreme 

caution and follow instructions carefully.

NOTE

: This indicates information particularly important for optimal system 

operation. Follow instructions carefully.

Safety Instructions

+

DANGER

: Risk of electric shock. Risk of fire. Only qualified electricians 

should install, troubleshoot, or replace the AC Battery. 

+

DANGER

: Risk of fire or explosion. Only qualified personnel, using personal 

protective equipment (PPE) should transport or handle the AC Battery. 

+

DANGER

: Risk of explosion. Do not dispose of AC Battery(ies) in a fire or by 

burning. The AC Battery(ies) can explode.

+

DANGER: 

Risk of fire. During use, when stored, or during transport, keep 

the AC Battery in an area that is well ventilated and protected from the 

elements, where ambient temperature is between -20° C and 45° C, and 

where relative humidity is between 5 and 95 percent.

+

DANGER: 

Risk of fire. If the AC Battery generates smoke, remove AC power 

from the Enphase System so that charging/discharging stops.

+

DANGER: 

Risk of electric shock. Risk of fire. Do not attempt to repair 

the AC Battery; it contains no user-serviceable parts. Tampering with or 

opening the AC Battery will void the warranty. Warranty void if the battery 

housing is removed. If the AC Battery fails, contact Enphase Customer 

Support for assistance at 

enphase.com/global/support/contact

.

+

DANGER

: Risk of electric shock. Do not use Enphase equipment in a man-

ner not specified by the manufacturer. Doing so may cause death or injury 

to persons, or damage to equipment. 

+

DANGER

: Risk of electric shock. Do not install the AC Battery without first 

removing AC power from the photovoltaic system. Disconnect the power 

coming from the photovoltaics before servicing or installing.

+

DANGER

: Risk of electric shock. Always de-energise the AC branch circuit 

during an emergency and/or before servicing the AC Battery. Never discon-

nect the DC connectors under load. 

+

DANGER

: Risk of electric shock. Risk of high short-circuit current. Observe 

the following precautions when working on batteries:

•  Remove watches, rings, or other metal objects.

•  Use tools with insulated handles.

•  Wear rubber gloves and boots.

•  Do not lay tools or metal parts on top of batteries.

+

DANGER

: Risk of electric shock. Risk of fire. Do not work alone. Someone 

should be in the range of your voice or close enough to come to your aid 

when you work with or near electrical equipment. 

+

DANGER

: Risk of fire. Do not allow or place flammable, sparking, or explo-

sive items near the AC Battery.

*

WARNING

: Risk of equipment damage. During use, storage, transport, or 

installation, always keep the AC Battery in an upright position. 

*

WARNING

: You must install the AC Battery only on a suitable wall using an 

Enphase wall-mount bracket.

*

WARNING

: Before installing or using the AC Battery, read all instructions 

and cautionary markings in this guide and on the equipment.

*

WARNING

: Do not install or use the AC Battery if it has been damaged in 

any way.

*

WARNING

: Do not exceed the maximum number (13) of AC Batteries in a 

20A AC branch circuit.

*

WARNING

: Do not sit on, step on, place objects on, or insert objects into 

the AC Battery.

*

WARNING

: The AC Battery is not waterproof. Do not place beverages or 

liquid containers on top of the AC Battery. Do not expose the AC Battery to 

liquids or flooding.

*

WARNING

: Damage to the battery can occur from over-discharge. While in 

storage, the AC Battery will discharge. If the battery state of charge falls to 

0%, the AC Battery can be damaged or destroyed. Because of this, the AC 

Battery must only be stored for a limited amount of time.
•  The AC Battery must be installed and energised by the “Must Energize By”  

    date on the shipping box label.

•  The AC Battery must have a charge state of at least 30% when placed in  

    storage.

•  If the AC Battery has already been installed, it must be placed into  

    

Sleep Mode

 prior to uninstalling. A battery in 

Sleep Mode

 can be stored  

    a maximum of two months from the date it was placed into 

Sleep Mode

•  When placing the AC Battery in storage, ensure that the DC connector is  

    unplugged.

*

WARNING:

 Risk of equipment failure. Size the AC conductor gauge to 

account for voltage rise for both the branch circuit and all upstream con-

ductors leading back to the point of connection. Refer to the technical brief 

on voltage rise at 

enphase.com/support

.

NOTE

: Perform installation and wiring in accordance with all applicable 

local electrical codes and standards. 

NOTE

: Protection against lightning and resulting voltage surge must be in 

accordance with local standards. 

NOTE

: Using unapproved attachments or accessories could result in 

damage or injury.

NOTE

: Use Class 1 wiring methods for field wiring connections to terminals 

of a Class 2 circuit. Use only 2.5 mm

2

 to 4 mm

wire in the junction box 

terminal block. Select the wire size based on the protection provided by 

the circuit breakers / fuses. Install properly rated over current protection as 

part of the system installation.

NOTE

: To ensure optimal reliability and to meet warranty requirements, the 

AC Battery must be installed and/or stored according to the instructions in 

this guide.

NOTE

: The AC Battery is compatible only with the 

Envoy-S Metered com-

munications gateway properly fitted with production and consumption 

CTs. 

This Envoy is required for operation of the AC Battery. Earlier versions 

of the Enphase Envoy communications gateway, and the Envoy-S Standard 

gateway are incompatible.

NOTE

: The Enphase AC Battery is intended to operate with an Internet 

connection. Failure to maintain an Internet connection may have an impact 

on the warranty. See Limited Warranty for full terms and services 

(enphase.

com/warranty).

NOTE

: When replacing an Enphase AC Battery, you must replace it with an 

AC Battery of the same type, with the same AC current rating.

NOTE

: When stored, the AC Battery is not connected to the grid and no 

automatic charge of the battery is possible.

NOTE

: Never leave the battery on its back for more than five minutes. The 

battery cells are meant to be in the upright position.

NOTE

: Properly mount the AC Battery or place it on a flat, plain surface that 

can bear heavy weights. Ensure that the mounting location is structurally 

suited to bearing the weight of the AC Battery.

NOTE

: During use, storage, and transport, keep the AC Battery: 

•  Properly ventilated

•  Away from water, other liquids, heat, sparks, and direct sunlight

•  Away from excessive dust, corrosive and explosive gases, and oil  

   smoke

•  Away from direct exposure to gas exhaust, such as from motor 

   vehicles

•  Free of vibrations

•  Away from falling or moving objects, including motor vehicles

•  At an elevation of fewer than 2,000m above sea-level

•  In a location compliant with fire safety regulations (has a smoke 

   detector)

•  In a location compliant with local building codes and standards

NOTE

: Conditions for the AC Battery installation site apply also to storage 

conditions.

SAFETY

IMPORTANT SAFETY INSTRUCTIONS. SAVE THESE INSTRUCTIONS. This guide contains important instructions that you must follow during installation 

and maintenance of the Enphase AC Battery. Failing to follow any of these instructions may void the warranty (

enphase.com/warranty

).

In Case of Fire or Other Emergency

In all cases:

•  If safe to do so, switch off the AC breaker for the AC Battery circuit, and if an 

isolator switch is present, switch off the AC isolator for the AC Battery circuit.

•  Contact the fire department or other required emergency response team.

•  Evacuate the area.

In case of fire:

•  When safe, use a fire extinguisher. Suitable types are A, B, and C dry 

chemical fire extinguishers. Additional extinguishing media include carbon 

dioxide, or alcohol-resistant foams.

In case of flooding:

•  Stay out of water if any part of the AC Battery or wiring is submerged.

•  If possible, protect the system by finding and stopping the source of the 

water, and pumping it away.

•  Let the area dry completely before use.

In case of unusual noise, smell or smoke:

•  Ensure nothing is in contact with the AC Battery or in the venting area on top 

of the AC Battery.

•  Ventilate the room.

•  Contact Enphase Customer Support at 

enphase.com/global/support/contact

.

Safety Instructions, continued

© 2016 Enphase Energy. All rights reserved. 

Enphase Storage System

Microinverters

Envoy-S

Metered

Switchboard

Router

Enlighten

To Internet

AC  

Batteries

INSTALLATION

       Choose a location for the AC Battery array

The AC Battery housing is an IP-20 rated metallic enclosure. The termi-

nal blocks on the wall-mount bracket accept a maximum conductor size 

of 4 mm

2

.

A ) 

Following local standards, 

choose a readily accessible, well-venti-

lated, indoor location (like a garage), which is out of direct sunlight 

and where the ambient temperature and humidity are within -20° C 

to 45° C and 5% to 95% RH, non-condensing. 

B )  Ensure that the mounting location can sustain the weight of the AC 

Battery and mounting bracket (28 kg or 60 lbs per battery).

C )  Plan the mounting location to be at least 300 mm (one foot) off 

the ground and 300 mm (one foot) from the ceiling. Keep the 

battery(ies) away from falling or moving objects, including motor 

vehicles.

D )  Ensure that there are no pipes or electrical wires where you plan to 

drill.

E )  Plan to maintain at least 300 mm (one foot) of clearance in front of 

each battery.

F )  Consider the dimensions of the AC Battery, easy access, height, and 

length of cable when selecting the location. 

G )  Do not block the vents or allow liquids to contact the AC Battery. 

The AC Battery is not waterproof.

H )  Select a location where you can connect to the site’s switchboard 

(load centre) using an appropriate branch circuit. 

I ) 

Following local standards,

 decide whether to connect using 

external conduit or by wiring inside the walls. This determines which 

knockouts to use in the junction box. Check if an AC isolator is 

needed. Plan the location for the AC isolation switch, if needed.

J )  If you are installing more than one AC Battery, continue to maintain 

minimum required clearances as shown in 

Step 2

.

1

PREPARATION

A )  Inspect the packaging and the AC Battery for damage. Do not install 

or use the AC Battery if it has been damaged in any way.

B )  Ensure that you have 1) one or more Enphase AC Battery(ies) and  

2) an equal number of Enphase Wall-Mount Brackets:

• 

The AC Battery shipping box contains an Enphase AC Battery and 

an access panel cover.

NOTE

: Check the “Must Energize By” label on the shipping box to 

verify that the AC Battery will be installed by the date shown.

• 

The wall-mount bracket shipping box includes only the bracket. 

Brackets are available in two widths to accommodate 450 mm and 

600 mm stud-spacing.

C )  Make sure you have the following 

required

 items:

• 

Enphase Envoy-S Metered communications gateway with 

production CT(s) and consumption CT(s) installed and configured 

as described in the 

Enphase Envoy-S Metered Quick Install Guide

The Enphase AC Battery requires an Internet connection (through 

the Envoy). Failure to maintain an Internet connection may have an 

impact on the warranty. See 

enphase.com/warranty

 for full terms 

and services.

• 

Mounting location that is structurally suited to bearing the weight of 

the AC Battery. The wall must have appropriately spaced studs (450 

mm or 600 mm) or can be a masonry wall.

• 

Tools: conduit (with fittings and fitting tools), drill, 4 mm pilot bit, 

screwdriver, socket, spanner, adjustable spanner, torque wrench, 

level, 4 mm Allen key, and wire stripper.

• 

Four 6 mm diameter lag bolts/screws, 25 to 50 mm long (depending 

on attachment wall), for each wall-mount bracket. Check with a 

structural engineer and local standards for requirements for your 

site. 

• 

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

• 

2.5 mm

2

 to 4 mm

(11 mm strip length) copper conductors (rated at 

75° C or 90° C) for push terminals.

• 

Gland or strain relief fitting (one for each used conduit opening in 

the AC junction box).

• 

20A maximum over current protection in accordance with local 

standards.

• 

Personal protection equipment (PPE) for handling lithium ion 

batteries as required by local safety standards.

D )  Make sure you have the following 

optional

 items, if needed:

•  20A maximum AC isolator

•  Stud finder 

E )  Install the PV system and the Envoy-S as directed by the installation 

manuals. 

F )  To record the location(s) of the AC Battery(ies), peel the removable 

serial number label from each battery and affix it to the respective 

location on a paper installation map. You will scan this map later 

using Enphase Installer Toolkit™ and your mobile device. You can find 

an example installation map at the back of any Enphase Microinverter 

manual.

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