With the development of the photovoltaic industry, the working efficiency of PV panel becomes more and more high, benefited from the development of the electronic control devices, the performance of the drivers and controllers are more reliable. In some application, people need the pump working day and night, in order to increase the efficiency. If use the general solar inverter, people need to add the peripheral control devices to finish the switch circuit, make the power input from PV to AC grid. It will make the entire system more complex. And about the general solar inverter, it needs the high input PV voltage, to confirm the driver output voltage meet the rated voltage of water pump. This article will introduce SSI Series. This product will supply a safe and complete solution. 

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1. Introduction 
Received the feedback information from the solar market and end-users, the price of solar panel is very expensive, they gave us the 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/DC channel input together.
In the night, there isn’t PV input energy, the pump will stop.
* Installed on the outdoor directly
The general solar inverter ingress protection is IP20, need to be installed in the control cabinet.  

In order to meet the requirement from end-users, and solve the disadvantages of solar inverter in the market, Schneider Solar developed a new product called SSI series, it belongs to Asia Schneider product. SSI series solar inverter has a modern appearance and excellent performance. It solves the problems the users mentioned.

 

2. Advantages of Schneider SSI series
* Suitable for single phase and 3-phase 220V AC water pump.
* Built-in MPPT controller and excellent MPPT algorithm for various photo voltaic panels.
* High ingress protection class IP65, meet various harsh outdoor environments, and can be installed in the outdoor directly.
* Support built-in capacitor and external capacitor submersible pump and surface pump.
* Built-in boost circuit parts for reducing the PV working voltage to DC 80~120V, save the cost of solar panel and improve the working efficiency. 
* Support PV input and AC grid input together, realize the switching function automatically, without human intervention. 
* Include water level control logic, avoid dry run status and added full water protection.
* Digital intelligent control, flexible adjusting and setting running speed range.
* Start smoothly for reducing the voltage spike to motor.
* Provide lightning protection, over voltage, over current, overheat etc.
* Built-in C3 filter, achieving reliable, automatic and unattended running
* One pump inverter can equip with multiple motors, support vector control.
* Low start voltage and wide input voltage range give more possibilities for accepting multi PV strings configuration and different type of PV module.
* Digital intelligent control can Flexible adjusting and setting pump’s speed range. In addition to soft start function also can provide lightning protection, overvoltage, over current, overload protection function

3. 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.

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4. Commisioning of SSI

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