Introduction
Three Phase High Voltage Hybrid Inverter for Residential & Light Commercial Energy Storage
1. Product Overview
The STH Series 4~12kW Three Phase High Voltage Hybrid Inverter is designed for small residential and light commercial photovoltaic energy storage systems requiring three-phase power supply.
Compatible with high voltage lithium battery systems, this hybrid solar inverter integrates PV generation, battery storage, grid interaction and emergency backup functions into one flexible solution.
With power output ranging from 4kW to 12kW, the inverter features dual independent MPPT trackers, 98.2% maximum efficiency, and IP65 outdoor protection, making it suitable for overseas villas, farms, small workshops and distributed microgrid projects.
The system supports 110% phase-unbalanced output, up to 10 units parallel connection in backup mode, and a wide 140~750V high voltage battery range.
With 10ms UPS-level seamless switching, critical loads can remain powered during grid failures.
The STH three phase hybrid inverter can be combined with our HPIXP High Voltage Stackable Energy Storage System to build complete high voltage residential PV storage solutions.
2. Core Advantages
Dual Independent MPPT Solar Tracking
The inverter integrates two independent MPPT channels, allowing flexible connection of multiple PV strings.
It improves solar energy harvesting efficiency for rooftops with different orientations and complex installation conditions.
High Voltage Battery Compatibility (140~750V)
Designed for modern high voltage lithium battery systems.
The wide battery voltage range enables flexible energy storage configuration and improves household energy self-sufficiency.
Recommended battery matching:
- HPIXP High Voltage Stackable Energy Storage System
- High Voltage Lithium Battery Modules
IP65 Outdoor Protection Design
The IP65 enclosure provides reliable protection against dust and water.
The inverter supports indoor and outdoor wall-mounted installation, reducing installation complexity and additional protection costs.
Powerful Parallel Expansion Capability
Support up to 10 units parallel connection under backup mode.
This allows flexible expansion for:
- Residential microgrids
- Farm energy systems
- Community distributed storage projects
- Small commercial applications
Excellent Overload Capability
The inverter supports:
- 125% continuous overload per backup phase
- 200% overload for 60 seconds
This ensures reliable operation with motor loads, pumps and other equipment with high starting current.
10ms UPS-Level Backup Switching
When grid failure occurs, the inverter switches to backup mode within 10ms.
It protects important loads including:
- Home appliances
- Water pumps
- Lighting systems
- Communication equipment
- Small production equipment
OLED Display + Mobile APP Monitoring
Dual monitoring interface:
- Local OLED screen
- Mobile APP remote monitoring
Users can easily check:
- PV generation data
- Battery status
- Load consumption
- System operation information
10-Year Factory Warranty
Long warranty period reduces after-sales concerns for distributors and installers.
Suitable for global residential solar energy storage markets.
3. Application Scenarios
Three Phase PV Energy Storage for Small Villas
For European and Australian houses with three-phase grid connection.
The system combines rooftop solar, high voltage batteries and hybrid inverter technology to achieve:
- Solar self-consumption
- Electricity bill reduction
- Backup power during outages
Internal Link:
→ Residential Energy Storage Solutions
Hybrid Energy Storage for Farms & Greenhouses
Suitable for agricultural applications requiring stable three-phase power.
Supports:
- Water pumps
- Ventilation systems
- Irrigation equipment
- Agricultural machinery
Provides reliable power supply in areas with unstable grids.
Internal Link:
→ Off-grid Energy Solutions
Small Shops & Workshops Energy Storage
Designed for small commercial users.
Applications include:
- Peak-valley electricity price optimization
- Backup power supply
- Load management
Internal Link:
→ Commercial & Industrial Energy Storage
Distributed Microgrid Projects
With up to 10 inverter parallel connection capability, the system is suitable for:
- Remote communities
- Camps
- Small distributed microgrids
Internal Link:
→ Backup Power Solutions
4. Product Certifications
The STH three phase high voltage hybrid inverter complies with international grid connection standards.
Certifications include:
- IEC62109
- EN61000
- C10/C11
- VDE 4105
- UNE217001
- UNE217002
- RD647
- RD1699
- CEI021
- G99
- EN62477
- NRS097-2-1
- EN50549
- UE2016/631
- TOR Erzeuger Type A
- OVE-Richtlinie R 25
5. Model Specifications
| Model | Rated Power | Phase | MPPT Channels | Battery Voltage Range | Protection Grade | Warranty |
|---|---|---|---|---|---|---|
| LPH-HT-4K | 4kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
| LPH-HT-5K | 5kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
| LPH-HT-6K | 6kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
| LPH-HT-8K | 8kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
| LPH-HT-10K | 10kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
| LPH-HT-12K | 12kW | Three Phase | 2 MPPT | 140~750V | IP65 | 10 Years |
6. Why Choose STH 4~12kW Three Phase High Voltage Hybrid Inverter?
The STH 4~12kW three phase high voltage hybrid inverter fills the market gap between single-phase residential storage and high-power commercial energy storage systems.
Compared with traditional single-phase hybrid inverters, it provides:
- Three-phase power output
- High voltage battery compatibility
- Strong overload capability
- Flexible parallel expansion
- UPS-level backup protection
It is an ideal solution for:
- Large residential houses
- Small farms
- Small commercial buildings
- Distributed microgrid projects
Combined with our HPIXP High Voltage Stackable Energy Storage System, it creates a complete high voltage PV + battery storage solution.
We support:
- Bulk wholesale
- OEM customization
- Private labeling
- Technical documentation support
Contact our sales team for quotations and datasheets.
Related Recommended Products
HPIXP High Voltage Stackable Energy Storage System
High voltage residential battery storage solution designed for three-phase hybrid inverter systems.
Internal Link:
→ /products/residential-energy-storage/high-voltage-stackable-energy-storage-system/
STH 15~33kW Three Phase High Voltage Hybrid Inverter
Higher power three-phase hybrid inverter for large villas and light commercial energy storage applications.
Internal Link:
→ /products/hybrid-inverter/sth-15-33kw-three-phase-high-voltage-hybrid-inverter/
STH Single Phase Low Voltage Hybrid Inverter
3~8kW low voltage hybrid inverter for standard residential PV storage systems.
Internal Link:
→ /products/hybrid-inverter/single-phase-low-voltage-hybrid-inverter/
XPB Wall-mounted Low Voltage Lithium Battery
Low voltage LiFePO4 battery for residential solar storage applications.
Internal Link:
→ /products/residential-energy-storage/wall-mounted-lithium-battery/
