Highlights
- Hybrid: Grid + Battery
- High efficiency 97.6%
- Supports Li-ion & Lead-acid
- UPS mode <10 ms
- Dual MPPT, Wide Range
Sunways STH Series Hybrid Inverter (3–6 kW, Single Phase, 2 MPPTs, Battery Ready)
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Highlights
- Hybrid: Grid + Battery
- High efficiency 97.6%
- Supports Li-ion & Lead-acid
- UPS mode <10 ms
- Dual MPPT, Wide Range
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Description
The Sunways STH Series Hybrid Inverter is engineered for residential and small commercial solar applications, offering seamless integration of photovoltaic generation, battery storage, and grid interaction. Available in power ratings from 3.3 kW to 6.6 kW, this single-phase inverter is designed to maximize energy efficiency and provide reliable backup power.
Equipped with dual MPPT (Maximum Power Point Tracking) technology, the STH Series optimizes energy harvest from multiple PV arrays, even under varying sunlight conditions. The inverter supports both lithium-ion and lead-acid batteries, providing flexibility in energy storage solutions. With a maximum DC input voltage of 600 V and a maximum DC input current of 15 A, it ensures compatibility with a wide range of solar panel configurations.
The STH Series boasts a maximum efficiency of 97.6%, ensuring minimal energy loss and optimal performance. Its IP65 protection rating guarantees durability and reliability, making it suitable for outdoor installations. The inverter also features natural convection cooling, operating silently and efficiently without the need for fans.
Designed with user convenience in mind, the STH Series offers smart monitoring capabilities through RS485, WiFi, and optional GPRS/LAN connections, allowing users to monitor and manage their energy systems remotely. The inverter’s lightweight and compact design facilitates easy installation, even by a single person.
Specification
Input (Solar/DC Side)
| Max Input Current per MPPT (A) |
16A |
|---|---|
| Max DC Voltage (V) |
600 V |
| MPPT Voltage Range (V) |
100 ~ 550 V |
| No. of MPPTs |
2 |
| Max DC Input Power (kW) |
5.76 kW |
Connector Specification
| Grid Connection |
Single phase |
|---|
Output (AC Side)
| Frequency (Hz) |
50 Hz / 60 Hz |
|---|---|
| Grid Connection |
Single phase |
| Rated AC Current (A) |
13–26 A |
| Rated AC Voltage (V) |
220 / 230 V |
| Rated Output Power (kW) |
3.3 kW ~ 6 kW |
DB Specification
| Mounting Type |
Wall‑mounted |
|---|---|
| Noise Level (dB) |
< 25 dB |
Mechanical Details
| Weight | 25.65 kg |
|---|---|
| Dimensions | 525 × 433 × 186 cm |
| Mounting Type |
Wall‑mounted |
Smart Features
| Communication Interfaces |
GPRS ,RS485 ,Wifi / Ethernet |
|---|
General
| Cooling Type |
Natural convection |
|---|---|
| Max Efficiency (%) |
97.6% |
| Phase | |
| Inverter Type |



