Solar energy
Current filter
Possession an own roof solar energy source is a popular tendency.
The invest cost of this project remain at high level for a long time, and supplemented by the government subsidy in the past.
Federation Germany government' 100 thousand roof power source projects provide the following option:
The PV system finance support of above 1kw.
18 MW, first year, support to set 6,000 roof power source, about 18MW
Second year, 9,000 roof power source=27MW
Third year, 12,000 roof power source= 36MW
Fourth year, 17,000 roof power source=51MW
Fifth year, 24,000 roof power source=72MW
Sixth year, 32,000 roof power source=96MW
= 300 MW (planned). = 6years in total =300MW(planed)
Finance support amount to 918 million Deutsche Mark (According to the current rate).
Government will not support fixed subsidy according to system and KW number like years ago.
Replaced by the low interest credit provided by Kreditanstalt für Wiederaufbau (KfW): Credit term is 10years, once payout the whole amount, it's not necessary for one to repay in the first two years, and then repay by 8 times, the payment method of each time is that per quarter pay 1/4 within two six months terms.
Once the EU energy mode starts, customers who own private solar energy source can reduce energy cost through in-phase feed mode.
The photoelectricity board that fix to the roof changes solar energy into DC, which can be stored in batteries, and also can be changed into alternating current by solar energy pole converter.
SWR logic circuit monitors the in-phase feed current of the main line.
Because of the influence of clock frequency signal that connected to direct current, it will increase the interference signal when changing direct current into alternating current by SWR.
For there are other electric equipments connected to the main power source line, solar energy system manufactures must ensure SWR units work within the finite EMC interferential value regulated by EN55011-B standard. Meanwhile, it also should satisfy the demands of CE.
It's the only approach to insure SWR not to affect by transistor radio, transistor equipment, transmission system of amateurs who share the same main line and other users.
Bajog has developed a series of DC/AC filters for this purpose, and this kind of filters can assure a stable and non-interferential power supply. It has been used in 1000 solar energy systems successfully.