MidNite Solar Rosie Instructions Manual

Rosie 3-Phase Wiring and Configuration Instructions (10-607-1 Rev B)
Overview
These instructions guide you through wiring and configuring the MNROSIE7048RE Inverter/Charger ("Rosie")
for 208VAC/3-Phase power. When three Rosie inverters are stacked together as a 3-Phase system, they
function as a unified inverter/charger, with each individual Rosie inverter creating one of the phases (i.e.,
Phase A, B or C) of the 3-phase system.
WARNING: The information in these instructions is meant to supersede the AC stack wiring
and stacking information provided in the MNROSIE7048RE Owner's Manual (PN: 10-432-1) and
the MNE300ROSIE-240P Manual (PN: 10-562-1).
You must carefully read and follow all safety instructions and cautionary markings specified in
the manuals listed above and in these instructions. An incorrect installation may result in the
risk of electric shock, fire, or other safety hazard; and/or equipment damage.
Info: For 3-Phase stacking support, the Rosie inverter requires firmware version 24.10.22.3 or
later, and the MNGP2 remote needs firmware version 24.10.16.00 or later.
3-Phase System Requirements
When connecting units as a 3-phase system, the following requirements must be met:
Info: The Rosie 3-Phase Breaker Boxes (PN's: MNE300ROSIE-120P3-Phase A, MNE300ROSIE-120F3-
Phase B and MNE300ROSIE-120F3-Phase C) meet the requirements needed to stack Rosie inverters
and are UL listed (US) and CSA certifi ed (Canada) for a code compliant installation.
• A Rosie 3-Phase power system requires at least three Rosie inverters wired together and a MNGP2
remote to configure each one.
• The MNGP2 remote must be directly connected to the CAN connection of one of the Rosie inverters to
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communicate and synchronize for 3-phase operation. It is recommended that the MNGP2 be connected
to the Primary (Phase A) inverter.
• Three communications cables—wired as a Cat5/Cat6 straight-thru/patch cable—should be connected in
series to the CAN connectors: one is provided with the MNGP2 remote and each Follower Breaker Box
(MNE300ROSIE-120F3-Phase B and MNE300ROSIE-120F3-Phase C) comes with one.
• Every inverter in the 3-Phase system must be connected to the same battery bank.
• The DC connection cables from the battery to each inverter must be of equal length and size.
• There must be a separate cable run from each inverters positive terminal to the battery bank through
a DC Disconnect and overcurrent protection device (i.e., breaker). Note: If you connect the cables
together—other than at a Battery Combiner—and a cable fails, there is a possibility of pulling too much
current through the remaining cables.
• The inverters' negative terminals must be connected together, either at the inverters or at a location
close to the inverters (within 18 inches/0.5 meters).
• The Rosie inverters should be no more than 6" (15 cm) from each other to allow the 6-foot communications
cables to connect to each inverter, but allow at least 3" (7.6 cm) between, under, above, and in front of
the inverter for ventilation purposes.
• The neutral outputs of all inverters are connected to the same neutral bus.
• The AC input to every inverter must be from the same 3-Phase source, and each phase (120 VAC leg)
from that AC source into each inverter input must be 120° out-of-phase from each other.
• Each inverter must have appropriate AC and DC overcurrent protection.
Note 1: A MNGP2 remote is not required if a MidNite MNBCLNA or MNHAWKE'S BAY charge controller is also
installed in the same system.
© 2025 Midnite Solar
MidNite Solar
19115 62nd Ave. NE
Arlington, WA
360.403.7207
www.midnitesolar.com
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