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How to select a solar inverter?

A solar inverter is different from ordinary consumer electronics or electrical products, it belongs to strong electric products, its safety requirements and reliability requirements are higher than ordinary products. Therefore, its choice should be especially careful. Select a solar (grid-connected) inverter and evaluate it mainly from the following aspects:

1. Protection.

Whether it has over current protection, over-voltage protection, under current protection, and under-voltage protection. If it is a grid-connected inverter, but also to see whether it has island protection. The first four kinds of protection are relatively easy to understand, but what is island protection? To put it simply, the inverter must detect the grid failure or power failure, and stop working, that is, when the grid power failure, the inverter must be able to detect and power off. Why is that? Mainly stems from the consideration of safety to overhaul personnel. When the power grid goes out, your solar system is still powering the grid, which can cause electrical shock to repair and maintenance personnel. CDS solar (www.. CDS-solar.com) provides solar grid-connected inverters with all of the above protection functions.

The protection function is not comprehensive products do not have to consider.

2. Efficiency.

Efficiency means the rate of return. Therefore, it is best to choose the one with higher efficiency. At present, the efficiency of grid-connected inverters on the market is more than 90%. Concentrated between 93% and 97%. The efficiency of the off-grid inverter is relatively low, about 86%. The grid-connected inverter is divided into transformer and transformer – free two. The transformerless one is slightly more efficient, but it does not have electrical isolation capabilities. The transformer inverter is divided into high frequency and low frequency according to the type of transformer. Inverters equipped with high-frequency transformers are small and light. Inverters equipped with low-frequency transformers are bulky and bulky, which are inconvenient to handle and install. The weight is about 40KG (3KW level). CDS solar (www.. The inverter supplied by cds-solar.com is a high-frequency transformer, weighing no more than 25KG (3.8kW and below power model). It can be mounted on the wall, which is very convenient.

3. Additional functions.

The basic function of the inverter is to invert the input DC into AC. In order to make the performance of the inverter better, easier to use, manufacturers have developed many additional functions. At present, there are many kinds of inverters in the world, which are in line with the trend. Newer features include Bluetooth and USB reading. These features come with a hefty price tag. The function is not more, enough is good. If we just purchase the inverter of an ordinary household residential power generation system, we only need to have these two additional functions:

(1). Maximum Power Tracking (MPPT) (required by grid-connected inverter): to ensure that the system can obtain the maximum energy harvest under any circumstances.

(2). display function: display the solar power generation system instantaneous electricity generation and cumulative electricity generation.

CDS solar (www.. CDS-solar.com) Inverters have accurate maximum function tracking and are equipped with large LCD screens that show the energy product status of the solar system. The LCD screen also has a backlit display. Just tap on the screen, at night or any other time, and you can see exactly how much energy is being generated.

4. After-sales service

What kind of after-sales service can the manufacturer provide? It is a very important issue to deal with product failure if it occurs.

CDS solar (www.. CDS-solar.com) has a pet big after-sales service team to provide you with perfect after-sales service. A phone call from you will solve the problem.

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