TrakStar MPPT Technology and Maximum Input Power

Morningstar’s TrakStar™ MPPT Technology & Maximum Input Power
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Morningstar’s TrakStar™ MPPT Technology & Maximum Input Power
The FAQs:
Q1. PWM controllers are rated in current only, but MPPT
controllers have both an output current rating and a
nominal input power rating in watts. How were these
ratings determined?
The output current rating is a constant value and indicates the maximum
charging current, in Amps, for both PWM and MPPT controllers.
 For PWM controllers the input current equals the output current
and is not transformed.
 An MPPT controller transforms higher voltage and lower current
at the input to a lower battery voltage and higher charging current
on the output.
Varray > Vbat. and Iarray < Ibat.
Morningstar’s nominal input PV rating depends on nominal battery voltage. The higher the battery voltage, the
greater the nominal input power rating is in Watts. It really indicates a typical maximum charging power, but like
nominal battery voltage, the actual maximum charging power is not a constant.
Nominal Maximum Input Power Ratings
These maximum power ratings are based on a nominal bulk charging voltages of 13.33V for 12V Nominal Battery
Voltage. Each Nominal Maximum Power Rating = (Maximum Output Current) x (Nominal Bulk Charging
Voltage).
Battery Volts
SS-MPPT-15L
TS-MPPT-30
TS-MPPT-45
TS-MPPT-60
TS-MPPT-600V
12V
200W
400W
600W
800W
24V
400W
800W
1200W
1600W
1600W
48V
1600W
2400W
3200W
3200W
TrakStar MPPT
Morningstar’s
Advanced Control
Algorithm to Harvest
Maximum Power from
a Solar Array’s Peak
Power Point