Supply and demand relationship is an
important symbol of the deterioration of the grid tie inverter
price fell sharply.
While technological progress is a decrease
in the prices of the reasons, more important is the white-hot competition.
In early 2010, a photovoltaic (pv) EPC
project, the component price is about RMB 14 / W, has dropped to less than 5
yuan/W.
Domestic inverter company less than 30,
2009, currently estimated at more than 300.
Price per watt in the 2009 3 yuan more,
fell to less than 0.5 yuan/W.
In
solar inverters
and UPS system under normal
circumstances, if the load overload or short circuit, when the load exceeds the
system rated output capacity, which is less than the sum of all power module
power output, the system can continue to run normally, send out alarm signal at
the same time, the system is no longer have redundant function; If load flow
more than the sum of all power module output power rating, weaver logic
commands will make all of the main circuit power module input and output relay
focus on static bypass switch and automatic transfer system, deal with directly
by the grid and power distribution protection over-current load;
Mains failure: in the case of mains failure
is detected, the rectifier will automatically
inverter charger
bus with ac input isolation,
at the same time, the battery pack into the discharge state, guaranteed by the
inverter load continuous operation; Once the mains, UPS can in the case of
don't need human intervention, automatically return to normal operation mode;
Manual maintenance bypass, throughout the
entire system failure or the need for emergency maintenance, transfer system
maintenance bypass;
Troubleshooting: can quickly repair is one
of the most important features of modular UPS, usually system an important link
and the reliability is relatively weak link in physical structure composed of
separate modules, and pull out plug ways are available for installation repair and
replacement.
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