Variable Frequency Device

Gream GD100-PV Series Solar Water Pump Inverter Applied in Different Places in the World

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Abstract: With the development of the photovoltaic industry, the working efficiency of PV panels becomes better, benefited from the development of the electronic and internet, Gream invests in R & D resources for developing a new solution, making installation simple and reliable. The new product learns experience from last generation products and the feedback from end-users all over the world. This article will introduce the GD100-PV series solar water pump inverter.

Keywords: GD100-PV, Photovoltaic, MPPT, PV water pump


Received the feedback information from the solar market and end-users, we get the following suggestion:

Reduce the PV panel quantity

Because the general solar inverter need high DC input voltage.

Support single phase pump.

For the civil water pump, many motors are single-phase, but the solar inverter in the market don’t support single phase, only support 3-phase.

Support AC/PV channels input together.

In the night, there isn’t PV input energy, the pump will stop. Some project needs to keep the pump working always.

Easy commissioning

The last generation product, need to modify some parameters to be suitable for different pump, new inverter can work automatically.

Support remote control

People can use mobile APP or website to monitor the running status, and control the system's start or stop.

In order to meet the requirement of end-users, and solve the disadvantages of solar inverters in the market, Gream developed a new product GD100-PV. It solves all the problems the users mentioned.

Figure 1: Principle of photovoltaic


Photovoltaic (PV) is the name of a method of converting solar energy into direct current electricity using semiconducting materials that exhibit the photovoltaic effect. A photovoltaic system employs solar panels composed of a number of solar cells to supply usable solar power. The process is both physical and chemical in nature, as the first step involves the photoelectric effect from which a second electrochemical process take place involving crystallized atoms being ionized in a series, generating an electric current.

Advantages of GD100-PV series

Two Solutions of GD100-PV

There are two solutions for different power rating pump, for the pump less than 2.2kW, the solution is as the figure 2, for the bigger power rating pump, the solution is as the figure 3.

For little power rating pump ≤2.2kW, when we configure the solar panels, the PV power is enough, but the PV output voltage is not enough, so it needs to buy more solar panel to increase the PV voltage.

GD100-PV supply the boost modular, support low PV voltage input and high DC voltage output, can reduce the PV quantity.

Figure 2: Boost module + GD100-PV

Figure 3: Auto-switch module + GD100-PV

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The auto-switch modular can detect the PV output voltage, and send the signal to GD100-PV, inverter will control the contactor to turn on/off the AC input.


Because the GD100-PV integrates so many features, such as reduce the PV input voltage, switch power input channel between DC and AC, high IP class IP54, and so on, the end users don’t need to maintain the solar inverter any more after setting the parameters in the first time.

After sunset the light will be weak, GD100-PV can detect the PV voltage is less than the setting point, it will change the power input channel from PV to AC grid automatically. If only PV channel input, GD100-PV will hibernate in the weak sun light and wake up automatically in the morning.

Figure 4: Water pumping system