Following the boost stage, a full-bridge or half-bridge inverter, controlled by pulse-width modulation (PWM) or sinusoidal PWM (SPWM), converts the DC bus voltage into a sinusoidal AC output. For single-phase pumps, the output frequency is typically 50 Hz or 60 Hz, matching national standards. Some advanced mini inverters employ a variable-frequency drive (VFD) function, allowing the pump motor speed to be adjusted according to water demand or solar availability. However, for cost-sensitive applications, fixed-frequency operation with a soft-start is more common. The inverter output is filtered with an LC filter to reduce harmonic distortion, ensuring that the motor runs at a low temperature and high efficiency.

The global shift toward renewable energy has brought solar-powered water pumping systems to the forefront of agricultural and rural development, particularly in sun-rich regions like Thailand. Among the many manufacturers and suppliers, JFY has emerged as a notable brand offering solar pump inverters that convert direct current (DC) from solar panels into alternating current (AC) to drive water pumps. For potential buyers, a critical consideration is the “ราคา” (price) of these inverters, as it directly impacts the feasibility of a solar pumping project. This report provides a detailed examination of JFY solar pump inverter pricing, the factors that influence it, and how it compares within the broader market context.

Many modern inverters also incorporate features such as dry-run protection, overvoltage and undervoltage protection, overcurrent protection, and a built-in display or remote monitoring interface. Some models support AC input as a backup, allowing the pump to run on grid power or a diesel generator when solar power is insufficien

A solar pump mini inverter DD is essentially a small variable-frequency drive (VFD) integrated with maximum power point tracking (MPPT) and designed for solar input. The “mini” descriptor reflects its low power rating, typically 0.37–2.2 kW, suitable for pumps from 0.5 to 3 horsepower. The “DD” designation means the inverter is wired directly between the solar array and the pump motor, with no battery storage. Rather than maintaining a fixed voltage, it constantly adjusts output frequency and voltage in response to fluctuating irradiance, driving the pump at a speed proportional to available sunlight. This direct-drive configuration eliminates the energy losses and maintenance burden of batteries, making the system simpler and more reliable.

Looking forward, the development of silicon carbide (SiC) and gallium nitride (GaN) devices is expected to benefit mini inverters. These wide-bandgap semiconductors allow higher switching frequencies, lower losses, and better thermal performance, enabling even more compact designs. Moreover, the integration of a “pump controller” directly into the motor body—a so-called “smart pump”—blurs the line between motor and inverter. Such integrated units are already seen in small submersible pumps, where the mini inverter is mounted directly on the motor’s top, requiring only two wires from the solar panel. This plug-and-play approach reduces installation errors and further lowers the barrier for non-technical users.

The SN2200 is rated for an output power of 2.2 kW (2200 watts), which corresponds to its model number. This power class is suitable for pumps with a nominal motor power of up to 2.2 kW, typically delivering flow rates of 10-30 cubic meters per hour depending on the total dynamic head (TDH) of the system. The inverter accepts a DC input from the solar array with a wide voltage range, typically from 200 to 450 volts (V), allowing for flexible PV panel configuration. The maximum PV array open-circuit voltage is usually around 500 V, and the recommended PV array power is between 2.5 and 3.5 kWp, ensuring sufficient margin for inverter efficiency and operation under low-light conditions.

In terms of installation, the SN2200 supports both single-phase and three-phase pump motors. It requires a proper DC cable size to minimize voltage drop, and surge protection devices (SPD) are recommended on both DC and AC sides. A typical installation comprises the inverter mounted near the pump controller, with the PV array positioned to avoid shading. The pump should be sized correctly for the required head and flow; the SN2200’s VFD allows for fine-tuning, but oversizing the pump can lead to inefficient operation.

Integrated pump-inverter packages: Many Thai distributors offer bundled deals—solar panels, pump, inverter, and accessories. The inverter alone accounts for roughly 15–25% of the total system cost. A 3-kW complete system might retail for THB 90,000–150,000, with the inverter portion being THB 30,000–45,00

Types of Solar Inverter Pumps
Solar water pumps are broadly classified into two categories: DC pumps and AC pumps. DC pumps operate directly on solar panel output, but they typically lack the sophisticated MPPT efficiency of inverter-based systems and are often limited to lower power ratings. AC pumps, when paired with an inverter, can handle higher power and offer better performance and reliability for larger application

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