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TrakMax 30L User Manual
Revision 1.0
c. Slide the Monitor down until the monitor is secure in place.
2. Mounting Bracket (included)
a. Secure the mounting bracket in desired location using two or three screws.
b. Align the bracket locks on the bracket with the bracket locks on the rear of the monitor.
c. Slide the monitor down until a click is heard and the monitor is secured in place.
4 OPERATION
4.1 M
P
AXIMUM
OWER
Maximum Power Point Tracking, frequently referred to as MPPT, is an electronic system that operates the
Photovoltaic (PV) modules in a manner that allows the PV modules to produce all the power they are capable of
producing.
MPPT and associated current boost operation is fully automatic and will function whenever sufficient PV voltage
and current are available. The percent increase in output charge current relative to PV current is variable, and
will change with operating conditions. When conditions are such that insufficient PV power is available to
produce an increase in output current, the unit will stop its internal DC-DC power conversion and operate as a
series pass PWM controller with very low forward voltage drop.
The principal operating conditions which affect current boost performance are PV array temperature and battery
voltage. At constant solar intensity, available PV power changes with PV temperature. A PV array's power vs.
temperature characteristic is such that a cool PV array can produce a higher voltage and more power, than a
hot PV array. When PV voltage is sufficiently high for MPPT to operate, a constant power output is delivered to
the battery. Since output power is constant while MPPT is operating, a decrease in battery voltage produces
corresponding increase in charge current. This means that the greatest current increase occurs with a
combination of cool ambient temperature and low battery voltage. The unit delivers the greatest charge current
increase when you need it most, in cold weather with a discharged battery. Additionally, anything that can be
done to lower PV array temperature will also lead to increased charge current by increasing PV power
production. In cool/comfortable temperatures and typical battery states of charge, most systems see about 10 –
20% increase. Charge current increase can go to zero in hot temperatures, whereas charge current increase
can easily exceed 30% with a discharged battery and freezing temperatures.
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P
T
(MPPT)
OINT
RACKING
windynation
05/06/2015
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