MidNite Solar MNROSIE7048RE 7kW Pure Sine Inverter with Charger

The MidNite Solar MNROSIE7048RE is a 7,000W pure sine wave inverter charger designed for off-grid residential and commercial renewable energy systems operating on a 48V DC battery bank. Delivering clean split-phase 120/240VAC output from a single unit—along with a 120A battery charger—it consolidates two components into one NEMA Type 1 enclosure built and assembled in Arlington, WA USA.

Key specifications

• Continuous output power: 7,000VA at 77°F (25°C); 6,000VA at 104°F (40°C)
• Overload capacity: 8,400VA for 30 minutes at 77°F (25°C); 15,000VA maximum surge
• Output voltage / frequency: 120VAC or 120/240VAC split-phase; 60Hz
• DC input voltage range: 40–65VDC (48V nominal)
• Battery charger output: 120A maximum; two or three-stage charging; power factor corrected; charge temperature compensation with optional Battery Temperature Sensor (BTS)
• Compatible battery types: Flooded, Lithium, AGM, Gel, and others
• AC input: 60A internal transfer relay; 82–140VAC input voltage range; 48–72Hz; grid and generator support
• Peak efficiency: 95%
• Total harmonic distortion: <5% at rated power
• Idle consumption: 30W (no search mode); 7W (search mode active)
• Enclosure: Die-cast aluminum; NEMA Type 1 indoor rated; screened against insects (gecko/mud dauber proof)
• Certifications: UL1741, UL458, CSA 107.1
• Dimensions: 13-15/16 W × 20-9/16 L × 8 D in.; 43 lbs.

Reliable output for sensitive loads

True sine wave output is a non-negotiable requirement for medical equipment, variable-speed motor drives, modern HVAC systems, and sensitive electronics. Unlike modified sine wave inverters, the MNROSIE7048RE produces a clean waveform with less than 5% total harmonic distortion at rated power, ensuring compatibility with the full range of household and light commercial loads. At 95% peak efficiency it does this without excessive battery draw—important in off-grid systems where every amp-hour counts.

Split-phase 120/240VAC from one unit

Many off-grid inverters require a separate transformer or a second unit to produce 120/240VAC split-phase power for large appliances, well pumps, or sub-panels with 240V loads. The MNROSIE7048RE delivers both legs from a single unit, simplifying wiring, reducing panel space, and eliminating the cost of a second inverter or step-up transformer. The unit can be configured for 120V-only output where split-phase is not required.

Application scenarios

• Off-grid homestead or cabin: Sized for medium renewable energy systems with enough continuous output to handle full household loads including well pumps, refrigerators, and HVAC.
• Grid-tied backup: The 60A AC input relay and generator/grid support allow seamless charging from utility or standby generator when solar input is insufficient.
• Light commercial off-grid: UL1741 and CSA listings satisfy AHJ requirements for permitted commercial installations.
• Generator-assisted systems: Two-wire auto generator start support allows the unit to trigger a generator automatically on low battery, with SOC monitoring available via MidNite Wizbang Jr. and MNGP2 accessories.

Advanced features

• Intelligent load management: Built-in peak load shave, self-consumption mode, and UPS function allow the system to prioritize battery use, reduce generator runtime, and maintain continuous power to critical loads.
• CANbus communications: Native CANbus support enables integration with compatible battery management systems and future MidNite communications accessories.
• 2 auxiliary ports: Two auxiliary input/output ports supply 200mA at 12VDC each for accessories, relay control, or system monitoring connections.
• Screened enclosure: The die-cast aluminum housing is screened to prevent insect intrusion—a practical feature for installations in unconditioned spaces like garages, outbuildings, and utility rooms.

System compatibility

The MNROSIE7048RE is designed for 48V battery banks and accepts flooded lead-acid, AGM, gel, and lithium chemistries, with charge profile customization and optional temperature compensation via the MidNite Battery Temperature Sensor (BTS). It pairs directly with MidNite Solar's own charge controllers and accessories including the MNGP2 display, ROSIE E-Panel (sold separately—includes required AC and DC input breakers and inverter bypass breakers), MNHAWKE'S BAY combiner, and MNBCLNA. SOC monitoring is supported through the MidNite Wizbang Jr. Remote battery voltage sensing is included. A future communications box enables web-based system monitoring. This unit is the home/office model (MNROSIE7048RE); the RV/Marine variant is the MNROSIE7048M.

Why choose the MidNite Solar MNROSIE7048RE?

The MidNite Solar MNROSIE7048RE stands out in the 7kW off-grid pure sine wave inverter charger category because it integrates a high-capacity 120A battery charger, flexible split-phase output, and a screened die-cast aluminum enclosure into a single UL1741/CSA-listed unit—designed and assembled in the USA. For system builders who need a reliable, mid-sized inverter charger with broad battery chemistry support and deep integration with MidNite's own monitoring and balance-of-system ecosystem, the MNROSIE7048RE is a purpose-built choice that avoids the compatibility compromises of mixing brands.