Enphase IQ Microinverter System Planning Tech Brief

Planning for an IQ Microinverter System
© 2017 Enphase Energy Inc. All rights reserved. July 28, 2017
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When using the Q Aggregator for combining multiple branch circuits on the roof, the combined production
circuit cannot be terminated on any of the 20 A circuit breakers within the IQ Combiner. It is still possible to
use an IQ Combiner in a system that uses a Q Aggregator for purpose of housing the IQ Envoy, but in this
scenario, the Q Aggregator combined output circuits must land at a separate breaker rated for the combined
inverter output current in a separate subpanel. Keep in mind that Line 1 of the combined output circuit
coming from the Q Aggregator must still pass through the production CT within the IQ Combiner, if the
system will be equipped with such.
Conceptual Schematic of IQ Combiner Installation
Branch Circuit 1
Branch Circuit 2
Branch Circuit 3
Main
Service
Panel
Roof
J-Box
Three 20A Homerun
Branch Circuits
IQ Combiner
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