In foreign countries, photovoltaic power system market is on the upsurge on a large scale. It is widely used from power station of construction with thousands of kilowatt to power station of domestic with hundreds of watts. That is already a great deal of experience in aspect of grid generated energy, cost control and safe reliability, and also initiated a reliable, full and accurate data bank. According to the feedback by foreign clients and market trends, after 2007, inverter model selection installation in grid photovoltaic power system become more and more tend to developed along miniaturization, intelligentalize and modularity.
Using advantages of small-sized grid tie inverter:
1. Generated energy
A .without transformer, higher generating efficiency
B. each inverter all has MPPT seeking, higher generating efficiency of total system
C. don't need direct-current power transmission in long distant, direct-current low loss
D. don't need alternating-current distribution of high capacity to get on the internet
2. Reliability
A. the malfunctions are less influence, almost non-existent the impact of fluctuating electricity grid
B. distributed control males system configuration more flexible, increase reliability of configurations and works.
3. Cost control
A. cost of without transformer has fallen greatly
B. reduce cost of package and transport
C centralized processing purchases materials, pipelining production operation, reduce cost of overall unit
D. level of protection of minimal machine IP65, it can be installed at outdoor without equip generator room specifically.
E. easily repaired, reduce cost of maintenance greatly