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  Morningstar Prostar 12 / 24 Volt 30 Amp Solar Panel Charge Controller w/ Digital Display
Morningstar Prostar 12 24 Volt  30 Amp  Solar Panel Charge Controller  w/ Digital Display


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Morningstar ProStar PS-30M, PWM Charge Controller

Rated Solar Current: 30 Amps

Rated Load Current: 30 Amps

System Voltage: 12 / 24 Volt

Warranty: 5 years


Morningstar's ProStar is the world's leading mid-range solar controller for both professional and consumer applications. This second generation ProStar:

Adds new features and protections using highly advanced technology
Provides longer battery life and improved system performance
Sets new standards for reliability and self-diagnostics


Estimated 15 year life

PWM series battery charging (not shunt)

3-position battery select: gel, sealed, or flooded

Very accurate control and measurement

Jumper to eliminate telecom noise

Parallel for up to 300 amps

Temperature compensation

Tropicalization: conformal coating, stainless-steel fasteners & anodized aluminum heat sink

No switching or measurement in the grounded leg

100% solid state

Very low voltage drops

Current compensated low voltage disconnect (LVD)

LED's indicate battery status and faults

Capable of 25% overloads

Remote battery voltage sense terminals


Short-circuit- solar and load

Overload- solar and load

Reverse polarity

Reverse current at night

High voltage disconnect

High temperature disconnect

Lightning and transient surge protection

Loads protected from voltage spikes

Automatic recovery with all protections

Protection against abuse and faults is now comprehensive.

Added solar short circuit and overload protection / auto recovery

Added load overload protection / auto recovery

Improved load short circuit protection / auto recovery

Improved protection of the load from voltage spikes

Improved low battery voltage and brownout protection / auto recovery

Other existing protections have been improved

Please note that one is not able to control the frequency of battery equalization. Furthermore, the Prostar only equalizes up to 15.1 volts and most flooded lead acid batteries list 15.5 volts.


Expected failure rate will be less than 1 per 1,000 units over 5 years.

Improved protections and added many new protections (see list below)

Power MOSFET voltage rating increased 25%

Eliminated all trim-pots and other troublesome parts

Reduced the digital meter components from 75 to 16

Increased the current-carrying copper traces by 75%

Increased temperature rating of many parts

Made conformal coating protection standard


Expanded the battery charging options and capabilities.

Added a third battery type selection (gel, sealed, flooded)

Added a "float" stage to the battery charging algorithm

Expanded the to account for depth of discharge history

Added a remote temperature probe option

Improved the accuracy of all charging parameters

Moved the built-in temperature sensor to read ambient conditions more accurately


The new Morningstar ProStar is easier and safer to install and use, with more operating information provided to the user.

Self-diagnostic test provides assurance the controller is working correctly, or indicates a fault that is present

Rotary switch provides simple and positive selection of battery type (and LED's confirm the selection)

Terminals are longer with more screw threads, screwdriver holes in the case are larger, and plastic tabs isolate the terminals

The push button disconnects the load first (for weekend cabins, boats, etc.), then disconnects the solar if held down for 2 seconds (indicated in the meter)

Five protection functions are displayed in the digital meter

Meter indicates "OFF" if solar or load is disconnected

PWM is indicated in the green battery status LED (blinking)

A telecom jumper eliminates PWM noise if present

Mounting standoffs prevent stress cracks in the case


Precision design for improved performance and accurate meter display.

Added 0.1% resistors and other precision components

Upgraded to a more powerful, faster micro controller with better resolution

Extensive digital filtering for improved accuracy

Added 2 precision shunts for very accurate current measurement

Calibration of the micro controller during final QA testing in production

The ASC may be mounted in almost any indoor or outdoor location. The unit should be mounted as close as possible to the batteries to avoid errors in battery voltage reading. The ASC may be mounted on the rear of the solar panels using outdoor-type double-stick foam tape. On units with temperature compensation (Option-A), the ASC should be mounted within 10 feet (3m) of the batteries to enable the sensor cable to reach the battery.

MADE IN AMERICA WITH A 10 YEAR WARRANTY (on units shipped after Jan. 1, 2007).


Specifications subjected to change without notice.

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