Midnite Solar MNE300ROSIE-240F Owner's Manual

The Midnite Solar MNE300ROSIE-240F is a 3000W, 240VAC split-phase off-grid inverter/charger designed for robust renewable energy systems. It features advanced Maximum Power Point Tracking (MPPT) solar charge control, a high-efficiency pure sine wave inverter, a powerful battery charger, and comprehensive system monitoring via the Rosie display. 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 & Alerts 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-frequency pure sine wave inverter, MPPT solar charge controller, AC battery charger, Rosie color touchscreen display, AC input/output terminals, DC battery terminals, PV input terminals, communication ports.

Feature	Description
Pure Sine Wave Inverter	3000W continuous, 6000W surge, 240VAC split-phase output
MPPT Solar Charge Controller	Integrated, high-efficiency tracking for PV array
AC Battery Charger	Programmable charger for grid or generator input
Rosie Display	Color touchscreen for system monitoring and configuration
AC Input/Output Terminals	For grid/generator connection and critical load panel
DC Battery Terminals	For connection to 24V or 48V battery bank
PV Input Terminals	For connection to solar array (up to 150VDC)
Communication Ports	For system expansion and monitoring (Ethernet, RS-485)
System Modes	Off-Grid, Grid-Tie with Backup, Generator Support
Protections	Over/under voltage, over temperature, short circuit, overload

Installation

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

Mount the unit: Secure to a wall or rack using provided hardware.
Connect the battery bank: Ensure correct polarity to DC terminals. Use appropriate cable size.
Connect the PV array: Wire solar panels to PV input terminals, observing voltage limits.
Connect AC wiring: Connect grid/generator input and critical load output to appropriate terminals.
Connect the Rosie display: Plug communication cable into designated port.
Ground the system: Connect equipment grounding conductor as per NEC.

WARNING! High voltage present. Installation must be performed by a qualified electrician in accordance with all local and national electrical codes. Disconnect all power sources before working on the unit.

First-Time Setup

Power on the system; configure via Rosie display.

Initial Power-Up: Connect battery bank first. The Rosie display will boot.
Configure Battery Parameters: Set battery type (Flooded, AGM, Gel, Lithium), voltage, and charging profiles.
Configure AC Input: Set grid/generator voltage, frequency, and current limits.
Configure AC Output: Set output voltage (240V split-phase), frequency (60Hz).
Configure Solar Charger: Set MPPT parameters for your PV array.
Set System Mode: Choose Off-Grid, Grid-Tie with Backup, etc.

CAUTION! Incorrect settings can damage batteries or connected equipment. Refer to battery manufacturer's specifications.

Specifications

Model: MNE300ROSIE-240F
AC Output: 3000W Continuous, 6000W Surge (10 sec), 240VAC Split-Phase, 60Hz Pure Sine Wave
DC Input Voltage: 24V or 48V DC Nominal Battery Bank
Solar Charge Controller: Integrated MPPT, Max PV Input 150VDC, 80A Max Charge Current
AC Battery Charger: 50A Max (from grid/generator), programmable
Efficiency: >90% inverter efficiency, >98% MPPT efficiency
Display: Rosie 7-inch Color Touchscreen
Communication: Ethernet, RS-485, Wi-Fi (optional)
Protections: Overload, Short Circuit, Over/Under Voltage, Over Temperature, Reverse Polarity
Operating Temp: -20°C to 50°C (-4°F to 122°F)
Enclosure: NEMA 3R (Rainproof)

Controls and Settings

Primary interface is the Rosie touchscreen display. Physical buttons: DC ON/OFF switch, AC BYPASS switch (if equipped).

Rosie Display Menus: HOME (system overview), BATTERY (status & settings), SOLAR (PV input & MPPT), AC INPUT (grid/gen settings), AC OUTPUT (load settings), LOGS (event history), SETTINGS (system configuration).

Key Settings: Battery charging voltages (Absorb, Float, Equalize), AC input current limit, AC output source priority (Solar First, Grid First, Generator), low battery cut-off, alarm setpoints.

Connecting Devices

Battery: Use large gauge cables to DC +/- terminals. PV: Connect to PV+ and PV- terminals. AC: Grid/Generator to AC INPUT, Load Panel to AC OUTPUT. Communication: Daisy-chain other Midnite devices via RJ45 ports.

Ensure all switches are OFF before connecting.
Torque all terminal connections to specifications in manual.
Use proper overcurrent protection (fuses/breakers) on all DC and AC circuits.
Select AC source priority via Rosie menu.

Tip: Label all wires clearly for future maintenance and troubleshooting.

Operating Modes

Supports multiple energy management modes.

Off-Grid Mode: Inverter powers loads from battery/solar. Grid input is not used.
Grid-Tie with Backup: Uses solar/grid to power loads and charge battery. Grid powers loads if solar/battery is insufficient. Inverter can sell excess solar to grid (if local codes permit).
Generator Support: Uses generator as AC input to power loads and charge batteries when solar/battery is low.
Charge-Only Mode: Uses AC input only to charge batteries, inverter output is off.
Search Mode: Inverter turns off when no loads are detected to save power, turns on when load is sensed.

WARNING! Do not connect the AC output to a utility grid or another AC source unless specifically configured for grid-interactive operation. This can cause severe damage and is a safety hazard.

Monitoring & Alerts

Rosie Display: Real-time monitoring of PV watts, battery voltage/state of charge, AC input/output power, system temperatures. Event Log: Records faults, warnings, and status changes. Remote Monitoring: Optional Wi-Fi/Ethernet kit allows monitoring via web portal or mobile app. Alerts: Visual and audible alarms for low battery, overload, high temperature, loss of AC source.

Care & Maintenance

Keep unit clean and free of debris. Ensure ventilation paths are not blocked. Periodically check and torque terminal connections. Monitor battery electrolyte levels (if flooded). Check system status logs regularly for warnings.

CAUTION! Do not open the unit. No user-serviceable parts inside. Contact qualified service personnel. Disconnect all power (AC and DC) before performing any maintenance.

Regulatory Information

UL 1741 SA Certified for grid-interactive operation. Complies with FCC Part 15 Class B for unintentional radiators. Copyright © Midnite Solar Inc. For support, technical documents, and firmware updates, visit www.midnitesolar.com or contact technical support.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No AC Output	Battery low, inverter off, overload	Check battery voltage; ensure inverter is ON; check for tripped overload.
Battery Not Charging from Solar	PV voltage low, poor sunlight, tripped breaker	Check PV connections and voltage; verify sunlight; reset DC breaker.
Rosie Display is Blank	No DC power, communication cable	Check battery connection and main DC fuse; reseat display cable.
Unit Overheating/Alarm	High ambient temp, blocked vents, overload	Improve ventilation; reduce load; allow unit to cool.
Grid Not Being Used	AC input not configured, voltage/frequency out of range	Check AC input settings on Rosie; verify grid voltage and frequency are within limits.

Reset: Some faults can be cleared via the Rosie display menu under LOGS > Clear Faults. A hard reset may require cycling DC and AC power.

Service: Contact Midnite Solar Technical Support or an authorized service center. Do not attempt to repair the unit yourself.