Introduction
Three Phase PV Energy Storage Inverter for Large Residential & Light C&I Applications
1. Product Overview
The STH Series Three Phase High Voltage Hybrid Inverter is designed for large residential and light commercial photovoltaic energy storage systems requiring three-phase power supply.
With a power range from 15kW to 33kW, this high voltage hybrid solar inverter supports high voltage lithium battery systems with a wide battery voltage range of 200~800V.
Equipped with dual independent MPPT solar trackers, the inverter provides flexible PV system configuration for complex rooftop installations. With a maximum efficiency of 98.2%, IP65 outdoor protection and 10-year factory warranty, it delivers reliable performance for global solar storage markets.
The STH three-phase hybrid inverter supports:
- Grid-connected operation
- Backup power supply
- Off-grid energy storage
- Peak shaving and energy management
With 10ms UPS-level backup switching, phase-unbalanced output capability and up to 3 units parallel connection under backup mode, it is ideal for:
- Large villas
- Estates
- Farms
- Small factories
- Commercial buildings
The inverter can be combined with our HPIXP High Voltage Stackable All-in-One Energy Storage System to build a complete high voltage three-phase residential energy storage solution.
2. Core Advantages
Three Phase High Voltage Hybrid Energy Solution
Designed for three-phase electricity environments, the STH series supports larger power demand compared with traditional single-phase residential inverters.
Suitable for:
- Large residential buildings
- Agricultural facilities
- Small commercial projects
- Light industrial applications
Dual Independent MPPT Solar Trackers
The inverter integrates 2 independent MPPT channels to optimize solar generation under different rooftop conditions.
Advantages:
- Support multiple PV string layouts
- Improve solar energy harvesting
- Adapt to different roof orientations
Wide 200~800V High Voltage Battery Range
The wide battery voltage window improves system flexibility and compatibility.
Benefits:
- Compatible with mainstream high voltage LiFePO4 batteries
- Flexible battery capacity expansion
- Higher household energy independence
Recommended matching system:
STH Three Phase Hybrid Inverter + HPIXP High Voltage Energy Storage System
98.2% Maximum Conversion Efficiency
High conversion efficiency reduces energy losses and improves overall PV storage system performance.
Suitable for:
- Daily solar self-consumption
- Peak electricity price shifting
- Backup power applications
10ms UPS-level Seamless Backup Switching
When grid failure occurs, the inverter switches to backup mode within 10ms.
Protect critical loads including:
- Home appliances
- Pumps
- Communication equipment
- Production equipment
Support Phase Unbalanced Output
The inverter supports phase imbalance output under both grid-connected and backup operation.
This feature makes it suitable for real-world loads where three-phase consumption is not evenly distributed.
110% Continuous Overload Capability
Supports continuous 110% overload output capability.
Advantages:
- Handles temporary high-power demand
- Improves system reliability
- Suitable for demanding applications
Up to 3 Units Parallel Expansion
Under backup mode, up to three units can work in parallel.
Flexible expansion for:
- Larger villas
- Farms
- Small commercial buildings
IP65 Outdoor Protection Design
The IP65 enclosure supports outdoor wall-mounted installation.
Benefits:
- Dust protection
- Water resistance
- Reduced installation requirements
Dual Monitoring System
Supports:
- OLED local display
- Mobile APP remote monitoring
Users can easily:
- Check energy data
- Configure parameters
- Monitor system operation
3. Application Scenarios
Three Phase PV Energy Storage for Large Villas & Estates
Large residential properties often require higher power output and three-phase electricity supply.
The system combines:
Solar PV + High Voltage Battery + Three Phase Hybrid Inverter
to achieve:
- Higher solar self-consumption
- Backup power during blackouts
- Reduced electricity costs
Recommended solution:
STH Three Phase HV Hybrid Inverter + HPIXP High Voltage ESS
Farm & Agricultural Energy Storage System
Suitable for agricultural applications requiring stable three-phase power.
Typical loads include:
- Water pumps
- Ventilation systems
- Temperature control equipment
- Agricultural machinery
Benefits:
- Reduce grid dependence
- Provide backup electricity
- Improve energy reliability
Small Factory & Commercial Energy Storage
For small factories, workshops and commercial buildings.
Applications:
- Peak-valley electricity arbitrage
- Demand charge reduction
- Emergency backup power
The system helps businesses reduce electricity expenses and improve power reliability.
Overseas Three Phase Residential & Light C&I Solar Projects
With comprehensive international certifications, the STH series is suitable for:
- Europe
- Australia
- South Africa
- South America
- Southeast Asia
4. Product Certifications
The STH Series Three Phase High Voltage Hybrid Inverter complies with international standards:
- IEC62109
- IEC62116
- VDE4105
- VDE0126
- AS4777
- RD1699
- NBR16149
- IEC61727
- IEC60068
- IEC61683
- EN50549
- EN61000
- NRS097-2-1
- IEC/EN 62477-1
5. Model Specifications
| Model | Rated Power | Phase | MPPT Channels | Battery Voltage Range | Protection Grade | Warranty |
|---|---|---|---|---|---|---|
| LPH-HT-15K | 15kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
| LPH-HT-17K | 17kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
| LPH-HT-20K | 20kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
| LPH-HT-25K | 25kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
| LPH-HT-30K | 30kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
| LPH-HT-33K | 33kW | Three Phase | 2 | 200~800V | IP65 | 10 Years |
6. Why Choose STH Three Phase High Voltage Hybrid Inverter?
The STH Series Three Phase High Voltage Hybrid Inverter provides a powerful solution for customers requiring higher capacity residential and small commercial solar storage systems.
Compared with single-phase hybrid inverters, this three-phase high voltage model offers:
- Higher power output
- Better three-phase load compatibility
- Wider battery voltage range
- Advanced backup capability
It creates a complete high voltage energy storage system when combined with:
HPIXP High Voltage Stackable All-in-One Energy Storage System
For standard residential applications, customers can also choose:
LPH-HS Single Phase High Voltage Hybrid Inverter
or
STH Single Phase Low Voltage Hybrid Inverter
We support:
- Bulk orders
- OEM customization
- Private labeling
- Technical document support
Contact our sales team for quotations and datasheets.
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