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Morningstar ProStar MPPT logo
ProStar MPPT Solar Charge Controller
w/ Maximum Power Point Tracking
Rated 25 Amp Maximum Battery Current
Morningstar Model Number PS-MPPT-25
Load Current Rating 25A
Max PV Open Circuit Voltage (Voc) 120V
Nominal Battery Voltage 12V or 24V
Nominal Max. Operating Power 12V: 350W @ 113°F
24V: 700W @ 140°F
Peak Efficiency 98%
Self-Consumption .6W-1W
Dimensions 7.9" x 6.7" x 2.8",
7.9" x 11.2" x 3.6"
w/ wire box
Weight 3.1 lbs.,
4.0 lbs. w/ wire box

Morningstar ProStar PS-MPPT-25 Solar Charge Controller


Morningstar ProStar MPPT 25 Solar Charge Controller (PS-MPPT-25)

ProStar MPPT charge controller
Shown w/ optional meter

The ProStar MPPT™ 25 solar charge controller with TrakStar Technology™ is an advanced maximum power point tracking (MPPT) battery charger for off-grid photovoltaic (PV) systems up to 1100 watts. This controller allows multiple modules in series for 12V and 24V battery systems.

Available with or without an advanced built-in meter, the ProStar MPPT 25 is ideal for industrial and residential applications. A Wire Box accessory to reduce hazards associated with exposed wires and connections can be purchased separately. Detailed battery programming options allow for advanced battery support for the latest Lithium, Nickel Cadmium, and Lead Acid battery types.

TrakStar MPPT technology provides the ability to charge 12 or 24 volt batteries with solar arrays of higher nominal voltages. A 12 volt battery bank can be charged with a 12, 24, 36 or 48V nominal off-grid solar array. Certain grid-tie solar modules may be used as long as the solar array open circuit voltage (Voc) rating will not exceed the ProStar MPPT 120V maximum input voltage rating at worst case (lowest) module temperature. 

ProStar PS-MPPT-25 Benefits

  • High Reliability – conformally coated circuit board and corrosion resistant terminals.
  • Maximizes Energy Harvest – using TrakStar MPPT Technology to determine and adjust to the true maximum power point as solar insolation changes throughout the day.
  • High Efficiency – at low, medium, and high power levels.
  • Data Logging – up to 256 days of detailed power and load data.
  • Low Noise Design – meets US Federal Communications Commission Class B specifications.
  • Automatic PV Based Lighting Control – field adjustable, multi-event load control enables powerful options for PV lighting systems.
  • MODBUS Communications – Solar Industry Standard MODBUS communications protocol allows for easy programming, control, remote data access and charge synchronization.
  • High Strength – polycarbonate case and extruded aluminum heatsink.
  • Self Diagnostics – continuous monitoring and reporting of any errors through its status LED’s, optional display or communication port.
  • Quality Hardware - The ProStar MPPT uses stainless steel fasteners, an anodized aluminum heat sink, and conformal coating to protect it from harsh conditions.

Morningstar ProStar MPPT Warranty

All of Morningstar’s ProStar charge controllers are warranted to be free from defects in material and workmanship for a period of FIVE (5) years from the date of shipment to the original end user. Morningstar will, at its option, repair or replace any such defective products.

ProStar MPPT certifications

ProStar MPPT 25 Certifications

• Complies with UL 1741, UL 62109 and CSA-C22.2 No. 107.1
• IEC 62109
• Complies with the US National Electric Code
• Complies with the Canadian Electrical Code
• FCC Class B compliant

ENs Directives:
• Complies with ENs and LVD standards for CE marking
• Immunity: EN 61000-4-3: 2006 & EN 61000- 4-6: 2009
• Emissions: CISPR 22: 2008
ProStar MPPT™, MeterBus™ are trademarks of Morningstar Corporation
MODBUS™ and MODBUS TCP/IP™ are trademarks of Modbus IDA.

Contact us toll-free: (877) 297-0014

Read more about Morningstar ProStar charge controllers.

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MorningStar ProStar MPPT 25 Detailed Review

Load & Lighting Control
• Low Voltage Disconnect, Low Voltage Reconnect Settings: 11.4V/12.6V or custom (x2 for 24 volt systems)
• Lighting Settings: Dusk-dawn or custom

• Dimensions
Standard: 20 x 17 x 7 cm / 7.9 x 6.7 x 2.8 in
w/ Wire Box: 20 x 28.5 x 9.2 cm / 7.9 x 11.2 x 3.6 in
• Weight
Standard: 1.4 kg / 3.1 lbs
w/ Wire Box: 1.8 kg / 4.0 lbs
• Wire Size Range
Power terminals: 2.5 - 35 mm2 / 14 - 2 AWG**
• Battery/Temp. sense: 0.25 - 1.0 mm2 / 24 - 16 AWG
• Knockouts (wiring box option): M20, 1/2”, 1” (trade sizes)
• Enclosure: IP20, Type 1

Electronic Protections
• Automatic recovery without fuses
• Solar Input: overload, short-circuit, high voltage warning, reverse polarity, high temperature, nighttime reverse current
• Load Output: overload, short-circuit, high temperature, reverse polarity
• Battery: reverse polarity (no battery removal)

ProStar MPPT 25 with Meter and wire box
ProStar MPPT 25 shown
w/ optional meter & wire box.

Battery Charging
• 4-stage charging: Bulk, Absorption, Float, Equalize
• 7 standard battery settings and customization
• Temperature Compensation
Coefficient: -5 mV / C /cell (25 C / 77 F ref.)
Range: -30 C to +60 C / -22 F to +140 F
Setpoints: Absorption, Float, Equalize

Data & Communications
• Communication Port: MeterBus
• Protocols: Morningstar MeterBus, MODBUS
• Datalogging: 256 days, daily records
• PC Software: MSView

ProStar MPPT Accessories
• Ground Fault Protection Device (GFPD-150)
• Remote Temperature Sensor (RTS)
• Remote Meter (RM-1)
• Wire Box (PS-MPPT-WB)
• RS-232 Communications Adapter (MSC-1)
• USB Communications Adapter (UMC-1)
• Meter Hub (HUB-1)
• Relay Driver (RD-1)

• CE; RoHS; UL1741/CSA.107.1; UL 62109; IEC 62109; FCC Part-15 class B compliant
• Manufactured in a certified ISO 9001 facility

ProStar MPPT charge controllers available with our complete systems.

Contact us toll-free: (877) 297-0014


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