Midnite Solar Rosie MNE300ROSIE-240P Owner's Manual

The Midnite Solar Rosie MNE300ROSIE-240P is a 3000W, 240V split-phase inverter/charger designed for off-grid and backup power applications. It features a pure sine wave output, integrated MPPT solar charge controller, advanced battery charging profiles, generator auto-start capability, and comprehensive system monitoring via the built-in display and remote communication ports. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operating Modes 8. Monitoring & Communication 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Inverter/Charger unit, Remote Display Panel (optional), AC Input/Output terminals, DC Battery terminals, PV Input terminals, Communication ports (RS-232, Ethernet).

Feature	Description
Pure Sine Wave Inverter	3000W continuous, 6000W surge, 240VAC split-phase output
Integrated MPPT Charge Controller	Up to 150VDC PV input, high-efficiency solar charging
Advanced Battery Charger	Multi-stage charging for Flooded, Gel, AGM, and Lithium batteries
Generator Auto-Start	Automatically starts/stops a generator based on battery state
AC Input	Grid or generator input for battery charging and pass-through
Display & Controls	Backlit LCD for system status, settings, and alarms
Communication Ports	RS-232 and Ethernet for remote monitoring and control
Protections	Overload, over-temperature, short-circuit, low/high battery voltage
Efficiency	>90% inverter efficiency, >98% MPPT efficiency
Operating Modes	Off-Grid, Grid-Tie with Backup, Generator Support

Installation

Unpack and inspect contents. Mount in a dry, well-ventilated location.

Mounting: Secure unit to a vertical wall using provided hardware. Ensure adequate clearance for cooling (min 6 inches on sides and top).
DC Battery Connection: Connect battery bank to DC terminals observing correct polarity (+ and -). Use appropriate cable size (refer to manual). Install DC fuse or breaker near battery.
AC Wiring: Connect AC input (grid/generator) and AC output (load panel) to designated terminals via properly rated conduit and breakers.
PV Array Connection: Connect solar panels to PV input terminals. Ensure PV voltage does not exceed 150VDC.
Communication & Display: Connect optional remote display panel and communication cables if used.
Grounding: Connect equipment grounding conductor to grounding terminal.

WARNING! Installation must be performed by a qualified electrician in accordance with all local and national electrical codes. High voltage present on AC and DC terminals can cause severe injury or death. Disconnect all power sources before working on the unit.

First-Time Setup

Apply DC power from batteries; follow prompts on display.

Initial Power-Up: Verify DC connections, then apply battery power. The unit will perform a self-test.
Configure Battery Type: Navigate menu to set battery chemistry (Flooded, Gel, AGM, Custom Lithium).
Set Battery Parameters: Enter battery bank voltage (12V, 24V, 48V), capacity (Ah), and charge voltages per battery manufacturer specs.
Configure AC Input: Set AC input type (Grid or Generator), voltage, frequency, and current limits.
Configure Inverter Output: Set output voltage (240V split-phase), frequency (60Hz), and search mode sensitivity.
Set System Mode: Select primary operating mode (Off-Grid, Grid-Tie Backup).
Enable Generator Auto-Start: If used, configure start/stop voltage thresholds and exercise schedule.

CAUTION! Incorrect battery settings can damage batteries. Always use manufacturer-recommended charging parameters.

Specifications

Model: MNE300ROSIE-240P
AC Output: 3000W Continuous, 6000W Surge (5 sec), 240VAC Split-Phase, 60Hz Pure Sine Wave
AC Input: 120/240VAC, 50/60Hz, for Grid or Generator
DC Input: 12/24/48VDC Battery System (selectable)
Integrated Charge Controller: MPPT, 150VDC Max PV Input, 80A Max Charge Current
Battery Charger (AC): 70A Max (at 48VDC)
Efficiency: Inverter >90%, MPPT >98%
No-Load Draw: < 20W
Protections: Overload, Short Circuit, Over-Temperature, Reverse Polarity, Low/High Battery Voltage
Communication: RS-232, Ethernet (Modbus TCP/IP compatible)
Operating Temp: -20°C to 50°C (-4°F to 122°F)
Enclosure: NEMA 3R (weatherproof for outdoor installation)

Controls and Settings

Access menu and status via front panel buttons and LCD display.

Front Panel: POWER button, ENTER, UP/DOWN arrows, ESC/MENU button, backlit LCD.

Display Screens: Home screen shows status (Mode, Input/Output Volts/Amps, Battery SOC, Faults).

Menu Structure:
SYSTEM: Set battery type, voltage, capacity.
AC INPUT: Configure grid/generator parameters, current limits.
INVERTER: Set output voltage, frequency, search mode, eco mode.
CHARGER: Configure bulk/absorb/float voltages, absorption time, equalization.
MPPT: View PV stats, set MPPT limits.
AUTO-GEN START: Configure start/stop voltages, exercise schedule.
COMMS: Set up Ethernet and RS-232 parameters.
INFO: View firmware version, run hours, error logs.

Connecting Devices

Battery Bank: Use heavy-gauge cables to DC terminals. Fuse within 18 inches of battery positive.

AC Grid/Generator: Connect to AC INPUT via double-pole breaker. AC OUTPUT feeds critical loads panel.

Solar Panels: Connect PV array to PV+ and PV- terminals. Include a DC disconnect and overcurrent protection as required.

Generator with 2-Wire Start: Connect generator start wires to dedicated terminals for auto-start function.

Remote Monitoring: Connect Ethernet cable for network access or RS-232 to a compatible monitoring device (e.g., Midnite Solar MNGP).

Tip: Torque all terminal connections to specifications listed in the manual. Loose connections can cause overheating and fire.

Operating Modes

The Rosie operates in several user-selectable modes:

Off-Grid (INV): Inverts battery power to supply AC loads. Solar and AC input charge the battery when available.
Grid-Tie with Backup (SBU): Priority to solar and battery. Uses grid only when battery is low. Supplies backup power during grid failure.
Grid-First (SUB): Priority to grid for supplying loads. Uses battery/inverter only during grid failure.
Charger Only (UTI): Unit acts as a battery charger (from AC or solar) but does not invert.
Eco Mode: Inverter turns off when no load is detected, turns on when load exceeds a set threshold, saving battery power.

WARNING! When connected to the grid, ensure all local utility interconnection requirements are met. Improper configuration can be dangerous and illegal.

Monitoring & Communication

Local Display: Shows real-time data: Battery Voltage/Current/SOC, PV Power, AC Input/Output, Load Power, System Mode, Alarms.

Remote Monitoring: Via Ethernet (web interface) or RS-232. Compatible with third-party monitoring platforms using Modbus TCP or RTU protocol.

Data Logging: Internal logging of system performance and fault history.

Generator Control: Monitor battery state and automatically control a compatible generator.

Care & Maintenance

Regular maintenance ensures long-term reliability.

Visual Inspection: Monthly, check for loose connections, corrosion on terminals, and debris blocking ventilation.
Cleaning: Unplug all power sources. Use a dry, soft cloth to wipe exterior. Do not use liquids or compressed air.
Battery Maintenance: Follow battery manufacturer's guidelines for watering (flooded), cleaning terminals, and checking specific gravity.
Firmware Updates: Periodically check Midnite Solar website for firmware updates to improve performance and add features.

CAUTION! Always disconnect AC and DC power before performing any inspection or maintenance. Internal capacitors can retain a lethal charge.

Regulatory Information

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it does not cause harmful interference. UL 1741 SA Certified for grid interconnection. Copyright © Midnite Solar Inc. All rights reserved. For technical support, firmware, and manuals, visit www.midnitesolar.com or contact [email protected].

Troubleshooting

Symptom	Possible Cause	Corrective Action
No AC Output	Battery low, inverter off, overload	Check battery voltage; ensure inverter is in ON mode; reset overload by reducing load and cycling power.
Unit Not Charging Battery	No AC input or solar, settings incorrect, breaker tripped	Verify AC/solar input is present; check charger settings in menu; reset DC or AC breaker.
Display Shows "Low Battery" Alarm	Battery discharged, poor connections, undersized battery	Recharge batteries; check and clean all battery connections; evaluate battery bank capacity for load.
Over-Temperature Fault	Insufficient ventilation, high ambient temperature	Ensure clearance around unit; install in a cooler location; clean air vents.
Generator Does Not Auto-Start	Settings incorrect, wiring fault, generator issue	Verify auto-start settings (voltages, exercise); check 2-wire start connections; test generator manually.
No Communication with Remote Device	Wrong cable, incorrect IP/Modbus settings, faulty port	Use correct cable (straight-through Ethernet, null-modem RS-232); verify network/Modbus settings; try different port.

Reset: Some faults can be cleared by cycling DC power. For persistent faults, perform a factory reset via the menu (note: erases all settings).

Service: Do not attempt to open or repair the unit. Contact Midnite Solar Technical Support: 1-360-435-6033 or www.midnitesolar.com.