AC Battery Installation
© 2016 Enphase Energy Inc.
141-00036 Rev 01
6
NOTES:
Method of active anti-islanding protection: The AC Battery monitors for sudden changes in the
impedance of the grid by looking for changes in the second to the eighth harmonic. If significant
changes are detected, then the internal microinverter is de-energized thus preventing islanding.
Perform installation and wiring in accordance with all applicable local electrical codes and
standards.
Protection against lightning and resulting voltage surge must be in accordance with local standards.
Using unapproved attachments or accessories could result in damage or injury.
Use Class 1 wiring methods for field wiring connections to terminals of a Class 2 circuit. Use only 12
AWG (2.5 mm
2
) to 20 AWG (4 mm
2
) 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.
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.
The Enphase AC Battery is compatible only with the Enphase Envoy-S Metered communications
gateway with properly installed production and consumption CTs. The Envoy-S is required for
operation of the AC Battery. Earlier versions of the Enphase Envoy communications gateway, and the
Envoy-S Standard gateway are incompatible.
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
http://enphase.com/warranty
for full
terms and services.
When replacing an Enphase AC Battery, you must replace it with an AC Battery of the same type, with
the same AC current rating.
When stored, the AC Battery is not connected to the grid and no automatic charge of the battery is
possible.
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.
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 6,000 feet (1,829 m) 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
Conditions for the AC Battery installation site apply also to storage conditions.
