What Is a Three-Phase Off-Grid Solar Inverter?

Aug 15, 2025

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A three-phase solar inverter transforms DC power from solar arrays and batteries into three-phase AC power (typically with three live wires and a neutral), delivering balanced high-power output around 380 V line voltage or 220 V phase voltage, depending on the region. These inverters are ideal for medium-to-large-scale applications—industrial, agricultural, remote infrastructure—where heavy machinery, irrigation pumps, telecom systems, or construction equipment need reliable three-phase electricity.

When configured for off-grid or hybrid use, they also manage battery charging/discharging, enable UPS functionality, and often include smart load management, making them the backbone of independent solar-plus-storage systems.

Key Specifications and Feature Highlights

1. Power Capacity & Output

  • Available models range from small-scale (≈3 kW) to large industrial setups exceeding 30 kW.

2. Battery & DC Inputs

  • Batteries supported span from 48 V up to 800 V+ for high-voltage systems.
  • MPPT inputs manage DC voltage up to 1,000 V in premium models; typical MPPT ranges span 150–850 V.
  • Charging capabilities include multi-stage protocols, high charge/discharge currents (e.g., 30–60 A), and efficiencies reaching 98%.

3. Hybrid Integration & Controls

  • Hybrid inverters incorporate an inverter, battery charger, MPPT solar charger, auto-transfer switches, and energy management, more or less in one unit.
  • They support smart modes like whole-home backup, grid sell-back, time-of-use management, peak shaving, and can scale via parallel stacking.

4. Efficiency & Performance

  • Maximum efficiencies typically fall in the 97–98% range; overall battery–AC round-trip efficiencies can reach 98%.

5. Scalability & Parallel Operation

  • Many models support parallel stacking—Efficient for growing loads. Sol-Ark units support up to 12 inverters; others, like PowMr or Must Power units, allow 6+ inverters in parallel.
  • FSP's AnyMode supports flexible phase-level scaling (e.g., up to 6 units for three-phase expansion).

Usage Scenarios

Three-phase off-grid inverters serve a broad array of applications:

  • Industrial and remote infrastructure: Powering heavy machinery, water pumps, drilling rigs, mining sites, telecom towers in off-grid areas.
  • Agricultural operations: Irrigation systems, grain dryers, livestock facilities.
  • Construction & temporary sites: Providing reliable three-phase power for tools and lighting.
  • Community microgrids and rural electrification: Enabling independent energy access for remote schools or small businesses.

Solar Portable Power Station

HPQ0300E ~ HPQ0700E

Safe And Reliable

LiFePO4 battery, safer and longer cycle life.

Comprehensive system design to provide eight-fold safety protection for the battery.

Strong Adaptability

Diversified charging methods, support AC charging, PV charging, on-board charging, etc.

Abundant output ports to power multiple devices simultaneously.

Pure sine wave AC output, no damage to elec trical appliances, stronger adaptability.

Simple And Portable

The hidden handle design makes it easier to carry outdoors.

Email: sunohoo_hn@sunorensolar.com

Phone: 86-573-87393188

Website: Solar Portable Power Station

Home Solar Power System

HPQ0800E ~ HPQ1200E

Safe And Reliable

LiFePO4 battery, safer and longer cycle life.

Comprehensive system design to provide eight-fold safety protection for the battery.

Strong Adaptability

Diversified charging methods, support AC charging, PV charging, on-board charging, etc.

Abundant output ports to power multiple devices simultaneously.

Pure sine wave AC output, no damage to elec trical appliances, stronger adaptability.

Simple And Portable

The hidden handle design makes it easier to carry outdoors.

Email: sunohoo_hn@sunorensolar.com

Phone: 86-573-87393188

Website: Home Solar Power System

图片

HPQ1300E ~ HPQ1800E

Safe And Reliable

LiFePO4 battery, safer and longer cycle life.

Comprehensive system design to provide eight-fold safety protection for the battery.

Strong Adaptability

Diversified charging methods, support AC charging, PV charging, on-board charging, etc.

Abundant output ports to power multiple devices simultaneously.

Pure sine wave AC output, no damage to elec trical appliances, stronger adaptability.

Simple And Portable

The hidden handle design makes it easier to carry outdoors.

Email: sunohoo_hn@sunorensolar.com

Phone: 86-573-87393188

Website: Portable Power Bank

Highlights:

HPQ0300E ~ HPQ0700E Solar Portable Power Station

  • Safe and Reliable: Equipped with a high-quality LiFePO4 battery, ensuring a longer cycle life and enhanced safety.
  • Advanced Protection: A perfect system design providing eight-fold safety protection for the battery.
  • Strong Adaptability: Supports multiple charging methods, including AC charging, photovoltaic (solar) charging, and car charging.
  • Versatile Power Output: Features multiple output ports (AC, DC, USB), allowing you to power multiple devices simultaneously.
  • Pure Sine Wave AC Output: Ensures clean power delivery, preventing damage to sensitive electronics.
  • Portable and Convenient: Designed with a hidden handle for easy transportation, making it ideal for outdoor use.

HPQ0800E ~ HPQ1200E Home Solar Power System

  • Safe and Reliable Power Storage: Our Home Solar Power System is equipped with an advanced LiFePO4 battery, ensuring superior safety and an extended cycle life. With an eight-fold safety protection system, it offers robust performance and peace of mind, safeguarding your power supply against potential risks.
  • Strong Adaptability for Various Charging Needs: Designed for ultimate convenience, this system supports multiple charging methods, including AC charging, PV (solar) charging, and on-board charging. Whether you're at home, traveling, or off the grid, you can recharge efficiently. The pure sine wave AC output ensures compatibility with all your electrical appliances, preventing damage and enhancing adaptability.
  • Power Multiple Devices Simultaneously: With abundant output ports, this system allows you to power multiple devices at the same time. From household appliances to outdoor equipment, it delivers stable and efficient energy to meet all your needs.
  • Portable and User-Friendly Design: Featuring a hidden handle design, this power system is easy to carry and transport, making it perfect for both indoor and outdoor use. Whether you're using it as a home backup power source or taking it on outdoor adventures, it provides seamless energy access wherever you go.

HPQ1300E ~ HPQ1800E Portable Power Bank

Introducing our Portable Power Bank featuring cutting-edge LiFePO4 battery technology, designed for safety, durability, and convenience. This power bank offers eight-fold safety protection to ensure reliable performance and a longer cycle life, making it one of the safest options available.

Its strong adaptability allows for multiple charging methods, including AC, PV, and onboard charging, ensuring you're always ready to power up wherever you go. With abundant output ports, you can charge or power multiple devices simultaneously, making it ideal for both work and leisure.

Enjoy pure sine wave AC output that delivers clean, stable power, preventing any damage to your electrical appliances. The strong adaptability of this power bank means it can power everything from gadgets to appliances with ease.

Practical Tips for Selection & Use

  • Sizing: Match inverter capacity to your load demands and future growth—common sizes range from 3 kW to 50 kW+.
  • Battery Compatibility: Ensure voltage and chemistry compatibility—higher voltage systems reduce cabling losses.
  • Scalability: Choose models that support parallel stacking if you plan to scale later.
  • Control & Monitoring: Hybrid inverters with smart modes and built-in EMS optimize performance and self-consumption.
  • Install Considerations: Consider cooling, enclosure rating, and warranties. Professional setup is essential for safe three-phase systems.

Three-phase off-grid solar inverters are advanced hybrid solutions that convert DC power into robust three-phase AC, ideal for industrial, agricultural, or remote applications. They integrate MPPT, battery charging, transfer switching, and intelligent energy management.