Nature Power 2000W-48V Marine Grade Wind Turbine (70701) - Manual (Page 14)

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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 increment). Each 48V group can have
different capacities. When connected in parallel the total capacity is the
sum of all individual 48V group capacities.
•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 (i.e. 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.
Please check your batteries specifications.
•Sizing: The size (capacity in Ah) of your battery bank depends on your
application. For a specific 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 current 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 to 2000W in a wind speed
range from 7 to 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 ensure safety from hazard to
people.
•The tower must have an upper portion of at least 3ft(1m) in length and
an outer diameter of 1.9inches(48.6mm)(the1½inch schedule 80 steel pipe