SP Series Off-Grid Solar Inverter Specialized for Photovoltaic Water Pumps
1. Product Overview
The SP Series Off-Grid Solar Inverter, a high-performance power conversion device exclusively designed for photovoltaic (PV) water pump systems, is a core component of off-grid solar water supply solutions. Tailored to overcome the pain points of unstable power supply, high energy costs, and difficult construction in remote water pumping scenarios, this series integrates advanced photovoltaic power generation technology, efficient inverter conversion technology, and intelligent pump control technology. It converts DC power generated by solar panels into stable AC power suitable for water pump motors, realizing zero-carbon, low-cost, and sustainable water extraction without relying on the public power grid.
Unlike general off-grid inverters, the SP Series is customized for the operating characteristics of various water pumps (including submersible pumps, centrifugal pumps, self-priming pumps, and deep-well pumps), with built-in professional pump drive algorithms and optimized load-matching logic. It supports both battery-less direct-drive mode and battery energy storage mode, adapting to diverse application environments such as agricultural irrigation, livestock breeding water supply, rural domestic water, and desert greening. Featuring a rugged industrial-grade design, high conversion efficiency, and comprehensive protection functions, it ensures long-term stable operation of water pump systems in harsh outdoor conditions, making it the optimal power solution for off-grid photovoltaic water pumping projects worldwide.
2. Core Technical Advantages
2.1 Ultra-High MPPT Efficiency for Maximum Solar Energy Utilization
Equipped with an upgraded intelligent Maximum Power Point Tracking (MPPT) algorithm, the SP Series Off-Grid Solar Inverter achieves an MPPT efficiency of up to 99%, far exceeding industry averages. The algorithm dynamically tracks the optimal operating point of the PV array in real time, adjusting the output power synchronously with changes in sunlight intensity, temperature, and environmental conditions. This ensures that the water pump system captures and utilizes every watt of solar energy, significantly improving water output even in weak light conditions such as early morning, late afternoon, and cloudy days. Compared with traditional inverters, it increases overall solar energy utilization by 15%-20%, maximizing water pumping volume while reducing the configuration capacity of PV panels and lowering initial investment costs.
2.2 Professional Pump Control Technology for Stable and Reliable Operation
The SP Series integrates a dedicated variable frequency drive (VFD) module for water pumps, supporting soft start and stepless speed regulation functions. The soft start function effectively reduces the impact current generated when the pump motor starts, avoiding mechanical damage to the pump and pipeline caused by instantaneous high load, and extending the service life of the entire water supply system. The stepless speed regulation technology automatically adjusts the motor speed according to real-time solar power: when sunlight is sufficient, the pump runs at high speed to increase water output; when sunlight is insufficient, it reduces speed to maintain continuous operation instead of frequent shutdowns, ensuring a stable and continuous water supply. Additionally, it supports wide frequency output (47-63Hz), compatible with 50Hz and 60Hz standard pump motors globally, with strong universality and strong adaptability to different pump models and power specifications.
2.3 Rugged Industrial-Grade Design for Harsh Environment Adaptability
Adopting a fully sealed, dustproof, and moisture-proof industrial chassis, with a protection grade of up to IP65, the SP Series inverter is resistant to rain, snow, dust, and humidity, suitable for long-term outdoor placement in fields, pastures, mountains, and deserts. It supports a wide operating temperature range of -20°C to 60°C, with automatic power derating and intelligent temperature control functions under high-temperature conditions, preventing equipment overheating and ensuring stable performance in extreme climates. The internal components use high-quality, anti-corrosion, and anti-aging materials, with a reinforced heat dissipation structure, low failure rate, and a designed service life of over 10 years, meeting the long-term, maintenance-free operation requirements of remote water pumping projects.
2.4 Comprehensive Multi-Level Protection for Equipment Safety
To ensure the safe and stable operation of the PV water pump system, the SP Series is equipped with a full range of automatic protection functions, covering all possible fault scenarios in practical applications. It includes over-voltage protection, under-voltage protection, over-current protection, short-circuit protection, reverse polarity protection, lightning protection, over-temperature protection, dry-running protection, and motor locked-rotor protection. The dry-running protection function is particularly critical for water pumps: when the water source is insufficient or the pump idles, the inverter automatically shuts down and sends an alarm prompt, avoiding motor burnout caused by dry running. All protection actions are triggered in milliseconds, with automatic fault detection and reset functions, effectively protecting the inverter, pump motor, and PV array, reducing maintenance workload and operational risks.
2.5 Flexible Operation Modes and Easy Installation
The SP Series Off-Grid Solar Inverter supports two flexible operation modes: battery-less direct drive and battery energy storage. The battery-less mode is suitable for areas with sufficient sunlight, simplifying the system structure, reducing costs, and realizing direct solar-to-water pumping. The battery energy storage mode configures lithium or lead-acid batteries according to demand, storing excess solar energy during the day for use at night or on rainy days, ensuring 24-hour uninterrupted water supply. It features a user-friendly human-machine interface with a large LCD display, showing real-time operating parameters such as PV input voltage, output power, pump speed, and fault codes. The wiring design is simple and standardized, with plug-and-play terminals, no complicated debugging required, and supports both wall-mounted and rack-mounted installation, greatly reducing construction difficulty and labor costs.
3. Key Technical Parameters
Parameter Item | Specification Details |
|---|---|
Input Voltage Range | DC 12V/24V/48V/96V (customizable according to power) |
MPPT Voltage Range | 120-800VDC (wide voltage adaptation, compatible with various PV arrays) |
Output Voltage | AC 220V/380V (single-phase/three-phase optional) |
Output Frequency | 50Hz/60Hz (programmable adjustable) |
Power Range | 0.75KW-30KW (covering small, medium, and large water pumps) |
Conversion Efficiency | Peak efficiency up to 97%, full-load efficiency ≥95% |
Protection Grade | IP65 (fully sealed, outdoor waterproof and dustproof) |
Operating Temperature | -20°C ~ +60°C |
Communication Interface | RS485/RS232 (supports remote monitoring and control) |
Cooling Method | Intelligent fan cooling + natural heat dissipation |
4. Wide Application Scenarios
4.1 Agricultural Irrigation
In farmland, orchards, greenhouses, and other agricultural scenarios, the SP Series inverter drives water pumps to extract groundwater or surface water for irrigation, replacing traditional diesel generators and grid-powered irrigation. It achieves zero fuel consumption and zero electricity bills, greatly reducing agricultural production costs. It is suitable for sprinkler irrigation, drip irrigation, and flood irrigation, and can automatically adjust water output according to crop water demand, improving irrigation efficiency and ensuring crop yield stability, especially suitable for large-scale farms and rural areas without grid coverage.
4.2 Livestock and Aquaculture Water Supply
For pastures, fish ponds, and breeding farms, the inverter provides a stable water supply for livestock, poultry, and aquatic products. It ensures continuous clean water supply even in remote pastures and aquaculture bases far from the power grid, solving the problem of difficult water supply for breeding. The stable operation and dry-running protection function avoid water supply interruptions caused by equipment failures, ensuring the healthy growth of livestock and aquatic products.
4.3 Rural Domestic and Drinking Water
In remote mountainous areas, islands, and pastoral areas with no access to the public power grid, the SP Series PV water pump system provides clean drinking water and domestic water for residents. It is easy to install and operate, with low later maintenance costs, improving the quality of life of rural residents and solving the long-standing problem of difficult drinking water in underdeveloped areas.
4.4 Desert Greening and Ecological Restoration
In desert control, afforestation, and ecological restoration projects, the inverter drives water pumps to implement drip irrigation and sprinkler irrigation for vegetation, using clean solar energy to maintain the growth of sand-fixing plants. It promotes ecological environment improvement without damaging the local ecological balance, realizing the coordinated development of renewable energy utilization and ecological protection.
4.5 Outdoor Engineering and Emergency Water Supply
For field construction, geological exploration, border outposts, and other outdoor scenarios, as well as emergency water supply in disaster areas, the SP Series inverter provides a mobile and reliable water supply solution. It is easy to transport and install, can be quickly put into use, and meets the temporary water demand of outdoor operations and emergency rescue work.
5. After-Sales Service and Quality Assurance
The SP Series Off-Grid Solar Inverter strictly implements international quality management standards, passing CE, RoHS, and other international certifications, with stable and reliable quality. We provide a 2-year standard warranty and lifelong technical support services, including pre-sales system design consultation, in-sales installation guidance, and after-sales fault maintenance. Our global technical service team responds quickly to customer needs, providing professional solutions and technical training to ensure the efficient operation of each PV water pump system. Relying on mature production technology and a perfect quality control system, we are committed to providing customers with high-quality, high-performance, and cost-effective off-grid solar inverter products, helping global users build sustainable and efficient photovoltaic water pumping systems.
6. Conclusion
The SP Series Off-Grid Solar Inverter, as a specialized power equipment for photovoltaic water pumps, integrates high efficiency, intelligence, reliability, and environmental protection. It breaks the limitations of traditional water supply methods, realizes the efficient conversion of solar energy to water energy, and provides a green, low-cost, and sustainable water supply solution for global off-grid areas. With its outstanding technical advantages and wide applicability, it is widely used in agriculture, breeding, domestic water, ecological restoration, and other fields, helping the development of renewable energy and promoting the construction of a low-carbon and environmentally friendly society. Whether it is small-scale household water supply or large-scale agricultural irrigation projects, the SP Series inverter can meet diverse needs, becoming the first choice for off-grid photovoltaic water pump systems.
Share This Article