Introduction
Residential Solar Energy Storage Inverter for Low Voltage LiFePO4 Battery
1. Product Overview
The STH Series Single Phase Low Voltage Hybrid Inverter is designed for residential photovoltaic energy storage systems, providing a flexible solution for homeowners, distributors and solar installers worldwide.
With a power range from 3kW to 8kW, this low voltage hybrid solar inverter is compatible with low voltage LiFePO4 battery systems and supports multiple operating modes including solar self-consumption, battery charging and discharging, grid interaction and off-grid backup power.
Equipped with dual independent MPPT trackers, the inverter supports different rooftop PV orientations and improves solar energy utilization. The compact wall-mounted design, 10-year factory warranty and comprehensive international grid certifications make it an ideal choice for residential solar battery storage projects.
The STH series can be combined with our XPB Wall-mounted Low Voltage Lithium Battery and XPE Floor-standing Energy Storage Battery to build complete low voltage residential energy storage solutions.
2. Core Advantages
Dual Independent MPPT Solar Tracking
The STH hybrid inverter integrates 2 independent MPPT channels, allowing flexible connection of multiple PV strings with different roof orientations.
Benefits include:
- Higher photovoltaic energy harvesting
- Better performance under complex rooftop conditions
- Flexible residential solar system design
Low Voltage LiFePO4 Battery Compatibility
Designed for low voltage residential battery systems, the inverter is compatible with mainstream LiFePO4 energy storage batteries.
It can be paired with:
- XPB Wall-mounted Lithium Battery
- XPE Floor-standing Energy Storage Battery
to create a complete:
Solar Panel + Hybrid Inverter + Lithium Battery Energy Storage System
Wide Power Range: 3kW-8kW
Complete single-phase power lineup meets different household electricity requirements.
Available models:
- 3kW
- 3.6kW
- 4kW
- 4.6kW
- 5kW
- 6kW
- 7.5kW
- 8kW
Suitable for:
- Villas
- Private houses
- Small commercial buildings
- Solar retrofit projects
10-Year Factory Warranty
Long warranty period reduces after-sales risks for distributors and installers.
Advantages:
- Lower lifetime operating cost
- Higher customer confidence
- Better market competitiveness
Multiple Operation Modes
The STH series supports:
PV Self-consumption Mode
Maximize the use of solar energy generated from rooftop PV systems.
Battery Energy Storage Mode
Store excess solar electricity and use it during peak electricity periods.
Grid-connected Mode
Support interaction with utility grids.
Off-grid Backup Mode
Provide emergency power supply during grid failures.
Compact Wall-mounted Design
The lightweight and compact structure allows:
- Indoor installation
- Outdoor wall mounting
- Easy residential installation
Suitable for global household solar storage markets.
Global Grid Connection Certifications
The inverter complies with multiple international standards, supporting market access in:
- Europe
- Australia
- Southeast Asia
- South Africa
3. Application Scenarios
Residential PV + Energy Storage System
For villas, private houses and residential buildings.
The system combines rooftop solar panels, hybrid inverter and lithium battery storage to:
- Increase solar self-consumption
- Reduce electricity bills
- Provide backup power during blackouts
Recommended solution:
STH Low Voltage Hybrid Inverter + XPB/XPE Residential Battery
Grid-tied & Off-grid Hybrid Residential System
Suitable for regions with unstable electricity grids.
The inverter provides:
- Grid-connected operation
- Battery backup
- Emergency power supply
Typical markets:
- Southeast Asia
- Africa
- Island regions
- Remote villages
Small Commercial Solar Storage System
For small shops, offices and workshops.
Applications include:
- Lighting backup
- POS equipment protection
- Peak electricity cost reduction
Existing Solar System Retrofit Upgrade
Upgrade traditional PV systems by adding:
- Hybrid inverter
- Lithium battery storage
to improve solar utilization and energy independence.
4. Product Certifications
The STH Series Hybrid Inverter complies with international safety and grid connection standards:
- IEC 62109-1
- IEC 62109-2
- EN/IEC 61000
- IEC 61727
- IEC 62116
- IEC 60068
- IEC 61683
- EN 50549-1
- CEI-021
- UNE 217001/RD244
- UNE 217002
- RD647
- RD661
- RD413
- RD1699
- PO12.3
- NTS 631 TYPE A
- VDE 0126-1-1 VFR
- G98
- AS4777.2
- AS60947.3
- MEA
5. Model Specifications
| Model | Rated Power | Phase | MPPT Channels | Battery Type | Warranty |
|---|---|---|---|---|---|
| LPH-LSS-3K | 3kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LSS-3.6K | 3.6kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-4K | 4kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-4.6K | 4.6kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-5K | 5kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-6K | 6kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-7.5K | 7.5kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
| LPH-LS-8K | 8kW | Single Phase | 2 | Low Voltage LiFePO4 | 10 Years |
6. Why Choose STH Low Voltage Hybrid Inverter?
The STH Series Single Phase Low Voltage Hybrid Inverter provides a reliable and flexible solution for global residential solar energy storage markets.
Compared with traditional grid-connected solar inverters, STH enables homeowners to store excess solar energy, improve energy independence and maintain power supply during outages.
Together with our residential battery products, it forms a complete low voltage solar storage ecosystem:
Solar PV → Hybrid Inverter → Lithium Battery → Home Loads
For customers requiring higher voltage battery systems, we also provide:
LPH-HS Series High Voltage Hybrid Inverter
which is designed for high voltage residential energy storage applications.
We support:
- Bulk orders
- OEM customization
- Private labeling
- Technical documentation support
Contact our sales team for quotation and product datasheets.
Related Recommended Products
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Off-grid Energy Solutions
Complete solar + storage solutions for remote areas, villages and unstable grid regions.
→ Internal Link:
Off-grid Solar Energy Solutions
