Installation Manual

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ProStar MPPT Operator’s Manual

4.0

Installation Instructions34

polarity (+/–) and battery voltage.

Next, the green, yellow or red LED will light depending on

the battery state-of-charge (SOC). Conﬁrm that one of these

LEDs is on before going to the next step.

Close the solar disconnect. If the solar input is connected

while in sunlight, the charging LED indicator will light.

Conﬁrm proper connection by observing the charging LED.

Close the load disconnect, and turn the load on, to conﬁrm

a proper connection.

If the load does not turn on, it could be for various reasons:

• the ProStar MPPT is in LVD (red LED on)

• there is a short circuit in the load (LEDs blinking R/G – Y)

• there is an overload condition (LEDs blinking R/Y - G)

• the load is not connected, not working, or turned off

After all connections have been completed, observe the

LEDs to make sure the controller is operating normally for

system conditions. If the optional digital meter is used,

observe that the display is scrolling with proper voltage

and current values. Also, a self- test can be performed with

digital meter units.

STEP 9: To Power-down

WARNING: Risk of Damage

ONLY disconnect the battery from the ProStar MPPT

AFTER the solar input has been disconnected. Damage to

the controller may result if the battery is removed while the

ProStar MPPT is charging.

AVERTISSEMENT: Risque d’endommagement

Le ProStar MPPT MPPT 150V SEULEMENT décon-

necter la batterie APRÈS l’entrée solaire a été déconnectée.

Le contrôleur pourrait endommager si la batterie est retirée

quand le ProStar MPPT MPPT 150V est en charge.

• To prevent damage, power-down must be done in the

reverse order as power-up.

4.1 TrakStar

MPPT Technology

The ProStar MPPT utilizes Morningstar’s TrakStar Maxi-

mum Power Point Tracking technology to extract maximum

power from the solar module(s). The tracking algorithm

is fully automatic and does not require user adjustment.

Trakstar technology will track the array maximum power

point voltage (Vmp) as it varies with weather conditions,

ensuring that maximum power is harvested from the array

through the course of the day.

Current Boost:

In many cases, TrakStar MPPT technology will “boost” the

solar charge current. For example, a system may have 2

amps of solar current ﬂowing into the ProStar MPPT and

5 amps of charge current ﬂowing out to the battery. The

ProStar MPPT does not create current! Rest assured that the

power into the ProStar MPPT is the same as the power out

of the ProStar MPPT. Since power is the product of voltage

and current (Volts x Amps), the following is true*:

(1) Power Into the ProStar MPPT = Power Out of the ProStar

MPPT

(2) Volts In x Amps In = Volts Out x Amps Out

* assuming 100% efﬁciency i.e. if no losses in wiring and

conversion existed.

If the solar module’s Vmp is greater than the battery voltage,

it follows that the battery current must be proportionally

greater than the solar input current so that input and output

power are balanced. The greater the difference between the

maximum power voltage and battery voltage, the greater

the current boost. Current boost can be substantial in

systems where the solar array is of a higher nominal voltage

than the battery as described in the next section.

4.0 OPERATION