Skip to content The ST-GP Series is a high-frequency off-grid inverter designed for reliable power conversion in areas with unstable grid or no grid access. Available in 1200W, 1500W,3500W,4200W,5500W,6200Wmodels, this pure sine wave inverter combines MPPT solar charging, AC charging, and battery management into one compact unit. It supports multiple battery types, lithium BMS communication, and a unique dual activation function for lithium batteries. Ideal for remote villages, small shops, residential backup, and off-grid work sites across Southeast Asia, Africa, South America, and the Middle East.
The ST-GP series 1.2kW-6.2kW single-phase off-grid solar inverters employ an MPPT charge controller with a conversion efficiency of up to 99.8% and advanced BMS technology, supporting off-grid operation. The following are its core technical parameters for your reference.
| Model | ST-GP1.2 | ST-GP1.5 | ST-GP3.5 | ST-GP4.2 | ST-GP5.5 | ST-GP6.2 |
| Rated Output Power (Off-Grid) | 1200W | 1500W | 3500W | 4200W | 5500W | 6200W |
| Max Efficiency | 99.20% | 99.20% | 99.20% | 99.20% | 99.20% | 99.20% |
| Grid Voltage Range | 90-280V | 90-280V | 90-280V | 90-280V | 90-280V | 90-280V |
| Max PV Input Power | 1000Wp | 1000Wp | 5000Wp | 5000Wp | 6000Wp | 6000Wp |
| MPPT Trackers | 2 | 2 | 2 | 2 | 2 | 2 |
| Battery Input Branches | 2 | 2 | 2 | 2 | 2 | 2 |
| Battery Voltage Range | 12V | 12V | 12V | 12V | 48V | 48V |
| Max Charge/Discharge Current | 60A+60A | 60A+60A | 100A+100A | 100A+100A | 100A+100A | 100A+100A |
| On/Off-Grid Switching Time | ≤10ms | ≤10ms | ≤10ms | ≤10ms | ≤10ms | ≤10ms |
| Protection Rating | IP20 | IP20 | IP20 | IP20 | IP20 | IP20 |
| Operating Temperature | -15℃~+60℃ | -15℃~+60℃ | -15℃~+60℃ | -15℃~+60℃ | -15℃~+60℃ | -15℃~+60℃ |
“ST-GP Series Three Phase Solar Inverter – Our Energy Storage Manufacturing Base
CCLAMP’s Isuna series hybrid inverters are proudly manufactured in our state-of-the-art energy storage production facility, equipped with advanced automated production lines, precision testing equipment and a professional R&D team.
We implement strict quality control throughout the entire process—from core component procurement, SiC chip assembly, to full-load aging testing—ensuring every inverter delivers 98.2% high efficiency, stable on/off-grid switching and long-term reliable performance. Backed by our vertically integrated supply chain (including our Meizhou PV module factory), we guarantee sufficient production capacity, on-time delivery and customized solutions for global residential, commercial and industrial energy storage projects.”
Custom Solar Solutions for Your Every Need
We provide clients with one-to-one professional support and one-stop solar lighting & energy storage solutions, from design to delivery and after-sales.
Backed by our professional R&D team, we keep developing innovative and patented designs. Most of our solar lights and energy storage products are independently developed and exclusive to our supply chain.
NASCCLAMP has built long-term partnerships with clients in more than 100 countries and regions worldwide. We are a trusted and stable supplier for distributors, contractors and project buyers.
As a professional source manufacturer, our modern factory supports large-scale stable production. Our supply capacity can fully meet your bulk orders, project demands and OEM&ODM requirements.
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