80KW 100KW 120KW 150KW 200KW 3 phase power inverter for off-grid solar power storage system

MILE SOLAR's state-of-the-art three-phase power inverter is specifically designed to meet the demands of off-grid applications, providing seamless integration and enhanced performance for your solar/wind energy storage needs.

  • ML-80KW
  • ML-100KW/120KW
  • ML-150KW/200KW
  • 80KW/100KVA
  • 360VDC or 384VDC
  • 380V, 400V, 415V
  • 380V/220V, 400V/230V, 415V/240V
  • AC first, DC first
  • 100KW/125KVA, 120KW/150KVA
  • 360VDC or 384VDC
  • 380V, 400V, 415V
  • 380V/220V, 400V/230V, 415V/240V
  • AC first, DC first
  • 150KW/200KVA, 200KW/250KVA
  • 360VDC or 384VDC
  • 380V, 400V, 415V
  • 380V/220V, 400V/230V, 415V/240V
  • AC first, DC first


Transformer based off-grid three phase inverter

* Output-isolation transformer
* Superior safety & protection.
* Robust Construction and Durability
* Stable and reliable performance

Digital dual conversion design

* Seamless power transfer and high-quality output
* Battery Compatibility for AGM, OPZV, LiFePo4 lithium

Large LCD control panel

* User-friendly interface
* Full-featured local management

Full protections


Technical specifications for off-grid three-phase inverter 100KW 120kw 150kw 200kw


Model ML100K ML120K M150K ML200K
Power 100KW 120KW 150KW 200KW
Input DC voltage 360VDC/384VDC
Phase 3 phase 4 wire and ground
Voltage Range 380V±20%(3 phase), Single phase 220V
Frequency Range 45-65Hz
Rectifier 3 phase 6 pulses, 12 pulses is optional
Output Phase 3 phase 4 wire + ground
Waveform Pure sine wave
Crest Factor 3:01
Rated Voltage 380/400/415V optional ±1% for static load, 5% for fluctuant load
Phase Voltage setting 200-244VAC, pls confirm before order
Transient Response ±5%,10ms
Frequency 50/60 Hz ±0.05%
Total-harmonic distortion < 3% linear load, <5%(nonlinear load)
short circuit current Short current for 0.1s(200% current)
Overload Capacity Overload 125% for 10 Mins, 125%-150% for 1min, automatically resume when the load becomes normal
Bypass Type Static state +manual maintenance bypass
Input Phase 3 phase 4wire and ground
Input Voltage Range 15% - 25% (the front control panel selectable)
Transfer Time Inverter / bypass transfer switch time(Overload): 0ms inverter / bypass transfer switch time (fault inverter) 1ms
Efficiency Whole unit >85%
Inverter 93%
Remote Signaling Dry contact (battery low, battery discharging, bypass / fault); output 12vdc/80mA, Optional parts
Environment Temperature 0-40 degree Celsius
Relative Humidity Less than 95% (without condensing)
Noise <60dB
Degree of protection IP20
Dimension(mm) 1100*897*1478 820*1170*1670
Package Size(mm) 1200*998*1635 920*1270*1840
Net Weight(kg) 720 750 850 910
Gross Weight(kg) 780 810 910 970




The heart of the off-grid three-phase solar system is the three-phase inverter. The inverter converts the DC power from the battery bank into AC (alternating current) power, which is compatible with three-phase electrical systems. It ensures a stable and reliable power supply to run three-phase loads, such as motors, machinery, HVAC systems, or large appliances.



Example of 150KVA 120KW 3 phase inverter used in off-grid 150KVA solar storage system for telecom stations 


What's the advantage of the LCD touchscreen interface of three-phase inverters 100KW 120KW 150KW 200KW?

An LCD touchscreen interface that allows selecting between battery priority or utility grid priority operating modes on an inverter charger system is useful for these reasons:


Battery Priority (Off-Grid Mode):

• The inverter charger will draw from the battery bank to power AC loads as the first priority. This is suitable when no utility grid is present such as for off-grid solar power systems. 

• Battery power will continue being consumed until the batteries reach a minimum allowable state of charge based on settings. Then non-critical loads may be shut off to preserve battery capacity for critical equipment. 

• Battery priority mode at night or during solar power shortage events will draw only from the batteries to operate the inverter output. A backup generator may start automatically if present in the system.


Utility Grid Priority (Backup Mode):

• The inverter charger will draw AC power from the utility grid connection as the first choice to power loads. Battery power will not discharge until the grid connection is lost.

• The inverter charger will charge the battery bank from any available solar or other input power when the utility grid is active. This ensures the batteries remain at optimal capacity for providing backup power when needed.

• When the grid connection is lost, the inverter charger transfers loads to the battery power instantly with minimal disruption. Battery power continues operating critical and non-critical loads until the grid is restored or a minimum battery capacity is reached based on settings. 

• A backup generator may start automatically on loss of grid to continue powering loads or charge the batteries depending on the system design.

The ability to switch between these two priority modes allows an inverter charger system to operate either as an off-grid or backup power solution using the installed battery bank, solar/generator inputs, and utility grid connection. An LCD touchscreen interface to select the proper operational mode based on the availability of inputs provides an intuitive user experience without needing manual switch flipping between different modes. System behavior, battery/input interaction and load support function as intended for the chosen mode with minimal hassle.

LCD-display for-three-phase-inveretr.pngLCD-information-for-three-phase-inverter.png

Testing and Quality Control: Rigorous testing and quality control measures are essential to ensure the inverter meets industry standards and performance expectations. Various tests are conducted, including electrical performance tests, load tests, efficiency tests, safety tests, and electromagnetic compatibility (EMC) tests. Any issues identified during testing are addressed and rectified to ensure the highest quality product.



Packaging and Shipment: The final stage involves packaging the inverters, including proper labeling and documentation. The packaged inverters are then prepared for shipment to customers or distribution centers, ensuring secure transportation and protection during transit.

packaging of three phase inverter.png



Our three-phase 100KW inverter used with LiFePo4 battery in the off-grid solar power system: provides a sustainable and cost-effective solution for powering large-scale applications off-grid.

3-phase inverter LiFePo4 battery system.jpg


What factors should you consider when searching for a three-phase off-grid inverter?

When searching for a three-phase off-grid inverter, several factors should be considered to ensure you choose the most suitable option for your specific needs. Here are some key considerations: 


Power Capacity: Determine the power capacity required for your off-grid system. Consider the total load demand and choose an inverter that can handle the power requirements of your three-phase loads. Ensure that the inverter's power rating matches or exceeds your maximum expected load. MILE SOLAR provides 10KW - 200KW three phase inverters for your needs.


Efficiency: Look for an inverter with high efficiency to maximize the utilization of your energy storage. Higher efficiency means less energy loss during the conversion process, resulting in better overall system performance and reduced operating costs.


Voltage and Frequency Range: Ensure that the inverter can operate within the voltage and frequency range of your off-grid system. Verify that the inverter can support the specific voltage and frequency requirements of your three-phase electrical system. Besides of 380VAC three-phase inverter, we also customize 220VAC three-phase or 415VAC three-phase inverters.


Battery Compatibility: Check the inverter's compatibility with the battery technology you plan to use, such as LiFePO4 or other suitable chemistries. Ensure that the inverter is designed to work effectively with the specific battery type, offering features like voltage range compatibility, charging algorithms, and communication protocols. Our inverter can use with 12V lead acid, 2V OPZV, or high voltage LiFePo4 battery. 


Protection Features: Consider the protection features provided by the inverter. Look for features like overload protection, overvoltage and Undervoltage protection, short-circuit protection. These features safeguard the inverter and connected equipment from potential damage due to abnormal conditions.


Monitoring and Control: Choose an inverter that offers comprehensive monitoring and control capabilities. Features such as real-time data monitoring, system status indicators, and remote monitoring options can provide valuable insights into the performance of your off-grid system.


Quality and Reliability: Select an inverter from a trustworthy manufacturer for producing high-quality and reliable products. Look for certifications and standards compliance to ensure the inverter meets industry requirements for safety, performance, and reliability.


Support and Warranty: Evaluate the support and warranty offered by the manufacturer. Check for warranty coverage, technical support availability, and service response times. It's important to have reliable support in case of any issues or questions regarding the inverter's operation.


What's the power capacity and DC input voltage of your three-phase off-grid inverter?

MILE SOLAR manufactures 3-phase inverters including: 10KW 15KW 20KW 30KW 35KW 40KW 50KW 60KW 80KW 100KW 120KW 150KW 200KW

With DC input voltage: 96VDC, 192VDC, 240VDC, 360VDC 384VDC options for 10KW 15KW 20KW 30KW 35KW 40KW three phase inverters.

360VDC, 384VDC options for 3-phase inverters from 50KW to 200KW.

AC output voltage: 3 phase 380V, 400V, 415VAC, 220V options

Please consult our sales team for more details regarding your projects. 


Q1: Can I have a sample/trial order for a test?

A: Yes, we accept sample orders/trial orders for you to test by one product or mixed solar product.


Q2: Can you do OEM/ODM?

A: Yes, we accept OEM/ODM orders for inverters, solar inverters, MPPT solar controllers, 3-phase inverters, solar generators, solar panels, and solar lights.

Please send your detailed request to our sales specialist for the best quote.


Q3: When will you deliver the goods?

A: 3-5 working days for sample order; 7-30 working days for quantity order after receiving the deposit payment.


Q4: Do you offer a guarantee for your solar products?

A: Yes, 18 months for inverter and inverter-related products including solar generators, and solar inverters, 2 years for three-phase inverter and MPPT controller, 10 years for solar panels, and 2 years for solar lights.




Inverter is a necessary unit for the off-grid power system or backup power system.


In an off-grid power system, the inverter plays a crucial role in converting the DC (Direct Current) power stored in batteries or generated by renewable energy sources into usable AC (Alternating Current) power for running electrical devices and appliances. 


In a backup power system, the inverter serves a critical role in providing electricity during power outages or when the main grid supply is unavailable. When main grid power is available, the inverter charges the battery. 


Inverter Used in Off-grid Solar System
Inverter used in Back-up Power System
Inverter Used in Wind Energy System

Application for off-grid three-phase inverters

Off-grid three-phase inverters have a wide range of applications across various sectors where reliable and independent power supply is crucial.


Here are some common applications of off-grid three-phase inverters:


Industrial and Commercial Facilities: Off-grid three-phase inverters are commonly used in industrial and commercial settings, including manufacturing plants, warehouses, office buildings, and data centers. These facilities often have high power demands and require a stable three-phase power supply for machinery, equipment, HVAC systems, and lighting.


Agriculture and Farming: Off-grid three-phase inverters are essential in agricultural applications, such as farms and ranches. They power irrigation systems, water pumps, grain drying systems, livestock equipment, and other agricultural machinery that operate on three-phase power.


Remote and Rural Areas: Off-grid three-phase inverters are ideal for providing electricity in remote or rural areas where grid access is limited or nonexistent. They enable the establishment of independent power systems, including microgrids, to meet the energy needs of communities, schools, healthcare facilities, and businesses.


Telecom Towers and Base Stations: Off-grid three-phase inverters play a critical role in powering telecom towers and base stations located in remote or off-grid locations. They provide a reliable three-phase power supply for uninterrupted communication services, ensuring connectivity and network reliability.


Mining and Oil & Gas Operations: Off-grid three-phase inverters are widely used in mining and oil & gas operations, especially in remote and off-grid sites. They power heavy machinery, drilling equipment, pumps, compressors, and other critical systems that require a stable and continuous three-phase power supply.


Construction Sites: Off-grid three-phase inverters are employed in temporary or remote construction sites where grid power is not readily available. They provide reliable power for construction equipment, tools, lighting, and temporary facilities.


Event and Entertainment Industry: Off-grid three-phase inverters are used in the event and entertainment industry to power large-scale sound systems, lighting rigs, stages, and other equipment that require three-phase power. They ensure seamless operations and uninterrupted performances in outdoor or off-grid event venues.


Remote Monitoring and Surveillance Systems: Off-grid three-phase inverters are utilized in remote monitoring and surveillance systems, such as security cameras, environmental monitoring stations, and wildlife tracking systems. They provide a reliable three-phase power supply for running the monitoring and communication equipment in isolated or off-grid locations.

Industrial and Commercial Facilities
Agriculture and Farming
Remote and Rural Areas
Telecom Towers and Base Station
Mining and Oil & Gas Operations
Remote Monitoring and Surveillance Systems

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