Power Range
Advanced Function
Protection Grade
The PB-G4 Solar Pumping Inverter is a project-grade solution designed for professional solar water pumping applications. Combining advanced MPPT technology, intelligent motor control, and a highly integrated industrial design, it delivers reliable, energy-efficient performance for agricultural irrigation, livestock watering, community water supply, and commercial pumping systems.
Supporting both PV-only and hybrid PV + AC operation, the PB-G4 automatically prioritizes solar energy while seamlessly utilizing the utility grid or a generator when additional power is required. With up to 99% MPPT efficiency and 98% conversion efficiency, the inverter maximizes solar energy utilization and daily water output, even under changing weather conditions.
Built for demanding outdoor environments, the PB-G4 features an IP66-rated enclosure, comprehensive motor protection, and compatibility with both induction motors and permanent magnet synchronous motors (PMSM). Integrated Bluetooth enables quick commissioning and local monitoring, while optional WiFi or 4G connectivity provides cloud-based remote monitoring, OTA firmware upgrades, and centralized management of multiple pumping sites.
Available in power ratings from 3.7 kW to 18.5 kW, the PB-G4 offers an ideal balance of performance, reliability, and ease of installation, helping reduce project costs while ensuring long-term, maintenance-friendly operation for professional solar pumping projects.
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Model
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PB-SG4
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PB-LG4
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PB-HG4
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Power Range
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3.7 kW
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3,7-5.5 kW
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3.7-18.5 kW
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Adapting Pump Motor
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1PH 220-240V 50Hz
2.2-3 kW |
3PH 220-240V 50Hz
2.2-4kW |
3PH 380-440V 50Hz
2.2-18.5 kW |
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AC Input Voltage
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1PH 220V~ 240 V
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1PH 220V~ 240 V
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3PH 380V~440V
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Recommended MPP Voltage
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310~400V
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280~400V
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500~700V
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Max. DC Input Voltage
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480V
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480V
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880V
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Startup Voltage
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150V
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150V
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360V
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Rated Conversion Efficiency
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≥97%
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≥97%
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≥98%
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MPPT Efficiency
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99%
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Ambient Temperature
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-20~60℃
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Display
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LCD
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Protection Grade
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IP66
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Cooling Method
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Forced Air Cooling
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Certification
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CE
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The PB-G4 is a project-grade solar pumping inverter designed for professional water pumping systems. It is suitable for agricultural irrigation, livestock watering, community water supply, and commercial pumping applications. Its integrated design, high efficiency, and industrial protection make it ideal for long-term outdoor operation.
Yes. The PB-G4 supports hybrid operation using both PV power and AC input from the grid power or a generator. The system automatically prioritizes solar energy, while ECO Mode intelligently supplements power from the grid or generator when necessary, ensuring continuous water supply with reduced energy costs.
The PB-G4 is compatible with both three-phase induction motors and permanent magnet synchronous motors (PMSM), providing flexibility for different pump types and project requirements.
Yes. Every PB-G4 inverter includes built-in Bluetooth for local commissioning and monitoring. Optional WiFi or 4G communication modules enable cloud-based remote monitoring, alarm notifications, parameter configuration, and centralized management of multiple pumping stations.
Yes. The PB-G4 features an IP66-rated enclosure that protects against dust and water ingress. Its fully sealed industrial design allows direct outdoor installation without requiring an additional electrical cabinet, helping reduce installation costs and simplify deployment.
The inverter incorporates comprehensive protection features, including dry-run protection, overvoltage, undervoltage, overcurrent, overload, overtemperature, phase-loss, and surge protection. These safeguards improve system reliability and protect both the inverter and the pump throughout long-term operation.
Yes. The PB-G4 supports multi-pump linkage and cascade control, allowing multiple pumps to operate in a master-slave configuration. The system can automatically start or stop additional pumps according to water demand, improving overall pumping efficiency while reducing energy consumption. This makes it an ideal solution for large-scale irrigation projects, commercial farms, centralized water supply systems, and other applications requiring higher water capacity.
The PB-G4 features an advanced MPPT (Maximum Power Point Tracking) algorithm with up to 99% MPPT efficiency, allowing the inverter to continuously extract the maximum available power from photovoltaic panels, even under rapidly changing sunlight conditions. Combined with a maximum conversion efficiency of ≥98%, the inverter maximizes solar energy utilization, increases daily water output, and reduces the overall cost of water pumping.
Yes. The PB-G4 supports dual-mode OTA (Over-the-Air) firmware upgrades, providing both local and remote update options. Users can perform Bluetooth OTA upgrades during on-site maintenance or deploy cloud-based OTA updates through the remote monitoring platform. This simplifies software maintenance, enables new feature deployment, and keeps the system up to date without replacing hardware or visiting every installation site.
Selecting the appropriate PB-G4 model depends on several factors, including the motor power, motor voltage, available PV array voltage, and project requirements. The PB-G4 series is available in power ratings from 3.7 kW to 18.5 kW, supporting both 220 V and 380–440 V pumping systems. Choosing the correct model ensures optimal performance, higher system efficiency, and reliable operation. If you are unsure which model is suitable, Solartech can provide professional sizing and system design support based on your pumping head, flow rate, local solar irradiation, and pump specifications.
Solar Priority Mode is an intelligent energy management function that automatically gives priority to solar power whenever sufficient photovoltaic energy is available. When solar generation decreases due to changing weather or low irradiance, the inverter seamlessly supplements the power with the utility grid or a generator if connected. This operating strategy maximizes the use of clean solar energy, reduces electricity or fuel consumption, and ensures a stable and uninterrupted water supply throughout the day. Solar Priority Mode is particularly beneficial for agricultural irrigation and remote water pumping applications where minimizing operating costs is essential.
ECO Mode is an energy-saving feature designed to optimize the balance between solar energy and auxiliary AC power. When hybrid operation is enabled, the inverter intelligently adjusts the amount of grid or generator assistance based on available solar power and pumping demand. By minimizing unnecessary AC energy consumption while maintaining reliable water delivery, ECO Mode helps reduce operating expenses and improve the overall return on investment of the solar pumping system.
Yes. The PB-G4 is PAYGO Ready, enabling manufacturers, distributors, and project developers to implement Pay-As-You-Go business models. This allows end users to pay for the system in installments rather than making a large upfront investment, improving affordability and expanding access to solar water pumping solutions in developing markets and off-grid regions. For projects requiring PAYGO functionality, Solartech can provide compatible solutions based on customer requirements.
The PB-G4 is designed for fast and convenient commissioning. Built-in Bluetooth allows installers to connect to the inverter using a mobile app for local configuration, parameter adjustment, and real-time monitoring without additional communication hardware. For larger installations, optional WiFi or 4G modules enable cloud-based commissioning, remote parameter configuration, system monitoring, and centralized management of multiple pumping sites, significantly reducing installation and maintenance time.
The PB-G4 is designed with a highly integrated architecture and an IP66-rated enclosure to minimize routine maintenance requirements. Under normal operating conditions, maintenance is generally limited to periodic inspection of electrical connections, cleaning dust or debris from ventilation areas, and checking the condition of the PV array, cables, and pump system. Firmware can be conveniently updated through Bluetooth or cloud-based OTA upgrades, ensuring the inverter remains up to date with the latest features and performance improvements while minimizing on-site service requirements.
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