1. Why choose the right size of solar inverter?

(1) efficiency, for the inverter power is too large, the solar panels can not always maintain the maximum power generation, so most of the day inverter can not maintain the maximum power operation, the efficiency will be greatly reduced, in the selection of the inverter size businessmen recommend that the inverter size is slightly lower than the power of the solar panels in this way, the inverter can be most of the time in the overclocking power can maintain the maximum power The output voltage increases the power generation efficiency of the solar system.

(2) grid, for the grid-connected solar system for the choice of inverter is very important, some regions and countries seriously limit the power input to the grid, access to the grid of solar energy systems have export restrictions, for users who want to be connected to the grid, you must know in advance of the local grid export restrictions.

(3) Cost, the initial installation cost of solar panels is an important factor in determining the payback cycle, for the larger size of the solar inverter required price is also more expensive, for the choice of large size of the solar inverter to increase the payback cycle.

(4) wave elimination, if the power generation of the solar system is greater than the rated power of the inverter on the inverter is not damaged, but the current will be eliminated is the so-called wave elimination, in the kind of phenomenon often occurs in the selection of the power is too small on the solar inverter, the wave elimination will be directly reduce the generating power when the power out of the power to maintain the power in the rated power of the solar inverter.

2. How to choose the right size of solar inverter?

Select the inverter power need to understand the rated power of the solar system, the general solar system DC power and inverter power ratio between 1.15 ~ 1.25, as long as less than the minimum ratio of 1.33 will enable the solar system to operate at maximum efficiency. For example, in Australia, when people choose solar inverters, the power of the solar system is 6.6kw, and the solar inverter with a minimum of 5kw is chosen to meet the Australian grid-connected exports.

3. factors affecting the choice of solar inverter size

(1) family electricity demand, choose the family solar inverter in time to the power of different appliances in the family, to ensure that the power of the inverter is greater than the total power of multiple appliances turned on at the same time.

(2) regional power generation, for each region of the day standard power generation peak is different for the selection of the appropriate solar inverter also has an impact on the Middle East, for the Middle East light time and intensity is significantly higher than in other regions to select the level of solar inverters to change, for Russia, the United Kingdom and other countries where the sun’s intensity is not high in the selection of solar inverters need to reduce the power.

4. Choose a large size solar inverter or a small size solar inverter?

According to most of the areas of power generation to see the actual solar power does not reach the rated power, always smaller than the rated power, taking into account the cost and efficiency of the usual selection of small-sized solar inverters, but especially suitable for the use of solar panels in the region need to meet the 1:1 or choose a large-sized solar inverters, in general, give priority to the selection of small-sized solar inverters are more suitable.

Conclusion, the solar inverter is an important part of the solar energy system, solar inverter selection and the efficiency of the solar energy system AC power generation has a direct relationship between the solar energy to choose a solar energy to make the solar panels power than the inverter power generation power of 1.15 to 1.25 is most appropriate.