14
The batteries in series within a group have to be the same type, chemical, age and capacity (in Ah).
You can connect several 48V groups in parallel to increase the battery bank capacity in Ah. However
the capacity of a 48V group is the same of each single battery in series within the group (no Ah in-
crement). Each 48V group can have different capacities. When connected in parallel the total capaci-
ty is the sum of all individual 48V group capacities (
24V sys need match 2V group
).
Minimum Battery Bank Capacity in Ah: We recommend 500Ah (420 Ah minimum) when using
the 2000W wind turbine as the unique power source. If there are additional 48VDC sources
connected to the battery bank (ie. Solar panels, AC-battery chargers, additional wind turbines,
etc.) the capacity of the batteries should be increased to avoid exceeding their maximum
charging current. As an approximation, the ratio between Total-48VDC-Source-Power / 4 =
Minimum recommended battery capacity. For example if there are up to 500W of solar panel
power and up to 2000W of the wind turbine power connected to the battery bank, we get
(500 + 2000) / 4 = 2500/4 = 625 Ah = minimum recommended battery bank capacity (
24V sys-
tem need match concern 24V batteries group
). Please check your batteries specifications.
Sizing: The size (capacity in Ah) of your battery bank depends on your application. For a spe-
cific load, the bigger the battery capacity in Ah, the longer the run time and the charging time.
The charging time for the battery bank depends on its capacity in Ah, the average consumption cur-
rent of the loads and the average power supplied by the turbine. This average power depends on
the average wind speed condition (in MPH) at your location. The higher the average power you get
from the turbine the shorter the charging time will be. As a result of that, for a specific charging
time, the faster the average wind speed the bigger (in Ah) the battery bank can be.
The wind turbine can supply a power from 0—2000W in a wind speed range from 7—45 MPH. You
can approximate the values in between the range. With this information and using standard battery
charging tables/ calculators (check the Web), you can get the average charging time. So you can play
with all the parameters in order to meet the requirements for your specific application.
9.2 Mounting Tower
The mounting tower that supports the wind generator is an extremely important part with respect
to safety. The mast used to attach the turbine and its foundation, must be strong enough to provide
adequate safety.
Location and height of the mounting tower: select a free and safe location where the ample
amount of wind flow is obtained. The height of the pole must be 11.5ft (3.5m) or more to en-
sure safety from hazard to people.
The tower must have an upper portion of at least 3ft (1m) in length and an outer diameter of
1.9 inches (48.6mm) (the 1 ½ inch schedule 80 steel pipe meets it). The total tower height
must be sufficient to prevent accidents with body or structures.
The tower must withstand horizontal wind pressure of 231 lb (105kgf) (at a wind speed of
49.2m/s, 177KPH, 110MPH).
If unsure please consult with your local tower contractor for details.
Содержание AWS2000
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