Data Sheet

Planning for an IQ Microinverter System
© 2018 Enphase Energy Inc. All rights reserved. December 13, 2018
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IQ System Design with Q Aggregator
The IQ Microinverter system introduces a new rooftop mounted, single-
phase Q Aggregator (Q-BA-3-1P-60), which enables plug and play
termination and combining up to three microinverter AC branch circuits at
a single location. The Q Aggregator offers additional design options and
can help to lower balance of system installation costs for many projects.
Q AGGREGATOR SPECIFICATIONS
Model number
Q-BA-3-1P-60
Dimensions
190 mm (W) x 227 mm (D) x 80 mm (H)
[7.5 in (W) x 9 in (D) x 3.2 in (H)]
Enclosure rating
NEMA3 (up to 45° from horizontal)
Temperature range
-40° C to +55° C (-40° F to +122° F)
Compliance
UL1703, EN62109, UL6703A
Design Considerations for the Q Aggregator
The Q Aggregator:
• Is a roof mounted combiner box that supports up to three circuits.
• Requires protection at the feeder panel by an over current protective device (OCPD) rated at an
ampacity not to exceed 60A. Make sure the conductor size selected for field wire from Q Aggregator
to the service connection is adequate for the OCPD chosen.
• Allows for a single homerun back to the service of #12 to #4. The
homerun must consist of two ungrounded conductors (hots) and
one ground conductor to provide equipment grounding for the
racking and modules as required.
• Does not need neutral. A neutral is not needed for the IQ system
on the roof and need not be provided at the Q Aggregator.
• Includes 20A fuses permanently installed on the fuse board
contained within the Q Aggregator for providing individual over
current protection for each of three branch circuits. The fuses are
not consumer serviceable and are labeled as such on the lid of
the Q Aggregator.
• Must be installed underneath a solar module on the roof and out
of the direct sunlight. You may install the Q Aggregator beneath a
solar module, as per NEC 690.34 Access to Boxes.
• Ships with a mounting bracket for rail-based mounting where the mounting flange is flush with the lid
of the enclosure. Installers can rotate the mounting bracket so it is flush with the bottom of the
enclosure for mounting on an L-foot (e.g., for rail-less racking systems that do not have a rail to
which to mount the Q Aggregator).
• Requires sealing caps (Q-BA-CAP) to seal unused connectors on Q Aggregator. (These are the male
connectors/caps.) Each Q Aggregator ships with one spare Q-BA-CAP. If all three circuits are used,
we recommend that you keep the unused cap for a future installation.
• Greatly facilitates center-feeding. Center-feeding is the process of dividing a branch circuit into two
or more sub-branch circuits. When using Q Cable and the Q Aggregator, a center-fed branch circuit
is a single cable that can be fed from the Q Aggregator at any position along the circuit where an
open connector is available. Never loop back a circuit to more than one connection on the Q
Aggregator.
• When installing the Q Aggregator, you must consider the location of the IQ Envoy. The IQ Envoy is
installed in an enclosure. Some options are detailed below.