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Mastervolt

131902500

Solar charge regulator MPPT SCM25

The MPPT SCM25 Mastervolt solar charge controller is designed to optimize battery charging from 200 to 700 Wp solar panels. With an efficiency above 98%, it charges batteries up to 30% faster than a PWM controller. Compatible with automatic 12/24 V systems and all battery types (AGM, Gel, flooded, Lithium Ion), it comes with a temperature probe. Ideal for small to medium installations on sailboats and motorboats.

Retail priceBenefit from the professional rate

$238.57 USD

$238.57 USD ~~$279.52 USD~~

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Free pickup point from €150 in France
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Installers near you

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Technical specifications

Product use	Solar charge regulation for 12/24 V batteries
Type de régulateur solaire	MPPT
Max charge current (A)	25
Nominal voltage	12/24
Mppt maximale puissance	720
Plage de tension d'entrée solaire	15-66
Absolute maximale solar tension	75
Tension de démarrage PV	15
Max efficiency	98
Chimies de batterie supportées	AGM,Gel,Flooded,Lithium Ion
Nombre d'entrées panneaux solaires	1.0
Sortie consommateur supportée	Oui
Nombre d'étapes de charge	3.0
Compensation de température	Oui
Cooling method	Passive
Protection features	Overload,Short circuit,Overheating,Reverse polarity,Overvoltage,Undervoltage
Display type	Backlit LCD
Mounting type	Vertical on solid surface
IP rating	IP23
Operating temperature range	-20 to 55
Weight	1.3
Dimensions (W x H x D)	135 x 190 x 75
Warranty	2.0
Plage de température ambiante	0 to 55
Audible alarm	Yes
Capteur de température batterie inclus	Yes
Détection automatique de la tension batterie	Yes
Section de câble recommandée	6
Certifications	CE, RoHS
Méthode de sélection du profil de charge	Power button (press >5s)
Dégagement requis autour de l'appareil	20
Type de refroidissement	Passive (natural convection)
Informations affichées sur l'écran LCD	State of charge, charge current, battery voltage, alarms, battery settings
Plage d'humidité de fonctionnement	5-95
Courant maximal de la sortie commutable	25
Courant PV max (A)	18
Maximale pv tension v	75
Maximale solar puissance wp	720
Orientation de montage requise	Vertical, downward-facing connectors
Rendement au point de puissance max	99.9
Consommation de nuit	5
Poids emballé	1.68
Protections détaillées	Overload, Short circuit, Overheating, Reverse polarity, Overvoltage, Undervoltage, High/Low PV voltage, Transient overvoltage
Tension de démarrage PV	15
Plage de tension PV nominale	15-66
Garantie years detail	2

Detailed description

The Mastervolt Solar ChargeMaster MPPT SCM25 solar charge regulator is the smallest MPPT regulator in its range, yet remains powerful. With a maximum charge current of 25 A and intelligent energy management, it is perfectly suited for small to medium solar installations, whether on a sailboat, motorboat, or recreational vehicle. Mastervolt’s MPPT (Maximum Power Point Tracking) technology delivers peak efficiency exceeding 98 %, ensuring battery charging up to 30 % faster than traditional PWM regulators.

MPPT technology and extended compatibility

Unlike its larger siblings in the range, such as the SCM50 or SCM60, the SCM25 is designed for solar panel power ratings between 200 and 700 Wp. It is compatible with a wide variety of panels, including entry-level 60-cell models, making it highly versatile. Its automatic 12/24 V detection simplifies installation. Mastervolt’s MPPT technology, with a maximum power point tracking accuracy of 99.9 %, continuously optimizes energy production, even in low light or changing light conditions.

Simplified installation and use

The SCM25 comes with a battery temperature sensor, essential for adjusting charge voltages and extending battery life. It is suitable for all battery types: AGM, gel, flooded, and Mastervolt Lithium Ion. Battery charge profiles are selected with a single button press, and the backlit LCD screen provides clear visibility of charge status, current, and alarms. Its IP23 protection rating guards against water splashes and condensation, but it must be installed in a dry, well-ventilated location.

Built-in protections and reliability

The SCM25 includes multiple protections: overcharge, short circuits, reverse polarity, overheating, and battery over/under-voltage. An audible alarm sounds in case of malfunction. While the SCM25 is a robust regulator, it is important to note that it does not protect against overvoltage on the solar input or induced overvoltages from storms. Installing a surge protector upstream is therefore strongly recommended for optimal system protection.

Documentation

Type	Nom
	EN - Safety Instructions - MPPT SCM25 Solar Charge Regulator
	EN - User Manual - MPPT Solar ChargeMaster 25 Charge Controller
	EN - Product Sheet - SCM25 MPPT Solar Charge Regulator
	EN - Safety Instructions - MPPT Solar ChargeMaster SCM25
	EN - Safety Instructions - MPPT SCM25 Solar Charge Regulator
	EN - User Manual - MPPT Solar ChargeMaster 25 Charge Controller
	EN - User and Installation Manual - MPPT Solar ChargeMaster 25 Charge Regulator

Expert opinion

Pol CONIN

Digital Manager

« A reliable and simple MPPT controller, ideal for small installations »

The SCM25 is an entry-level MPPT charge controller well designed for small to medium solar installations. Its compatibility with Mastervolt Lithium Ion batteries via an external DC relay (ref. 77030500) is a major advantage for sailors looking to modernize their battery bank. The IP23 housing is adequate for a dry technical space, but be aware: this controller is not protected against atmospheric overvoltages. On a sailboat, adding a DC surge protector on the solar input is essential to prevent damage during thunderstorms. The supplied temperature probe is a plus for battery longevity, but its lack of NMEA communication or connection to a centralized energy management system (such as MasterBus) limits it to a standalone regulator role. It is an excellent choice for a simple and reliable installation, provided you strictly adhere to the recommended cable cross-sections (10 mm² for lengths exceeding 2 meters).

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Solar charge regulator MPPT SCM25

$238.57 USD

$238.57 USD ~~$279.52 USD~~

Frequently Asked Questions

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What is the maximum charging current of the SCM25 charge controller?

The maximum charging current of the Mastervolt MPPT SCM25 solar charge controller is 25 A at 40 °C. This value is essential for correctly sizing your solar installation and batteries.

What is the maximum solar panel power I can use with the SCM25?

The SCM25 is designed for solar installations with a power output between 200 and 700 Wp. More specifically:

At 12 V: maximum power of 360 WpAt 24 V: maximum power of 720 WpThese values ensure optimal and safe operation of the charge controller.

Is the SCM25 compatible with 60-cell solar panels?

Yes, it is. The SCM25 MPPT regulator is specifically designed to be compatible with entry-level 60-cell solar panels, in addition to traditional 36-cell and 72-cell models. This makes it highly versatile for different panel configurations.

What types of batteries can I use with the SCM25 regulator?

The SCM25 is compatible with a wide range of batteries:

AGM, Gel, Flooded (open lead-acid), Lithium Ion (Mastervolt). Charge profiles are pre-programmed for each type and can be easily selected via the power button.

Does the SCM25 automatically detect battery voltage (12 V or 24 V)?

Yes, the SCM25 regulator has an automatic 12/24 V detection function. It automatically adapts to your system's voltage, simplifying installation and preventing manual configuration errors.

What is the maximum PV input voltage for the SCM25?

The maximum PV input voltage (at minimum temperature) is 75 V. Under nominal operation, the PV voltage must be between:

15 and 66 V for a 12 V installation, and 30 and 66 V for a 24 V installation.

Is the SCM25 supplied with a battery temperature sensor?

Yes, the SCM25 charge controller is supplied with a battery temperature sensor. It automatically adjusts charging voltages based on battery temperature, optimizing charge and extending battery life.

What is the IP protection rating of the SCM25?

The SCM25 regulator has an IP23 protection rating. This means it is protected against finger contact and water splashes up to 60° from the vertical. It is suitable for indoor use in dry or damp environments, but not for outdoor exposure to rain.

Can I use the SCM25 with a Lithium Ion battery that is not Mastervolt brand?

The manual states that the SCM25 is compatible with Mastervolt Lithium Ion batteries. For a lithium battery from another brand, it is imperative to verify the compatibility of charge profiles and voltages. In case of doubt, consult the battery manufacturer or a qualified installer.

How to select the battery type on the SCM25?

To select the battery type, hold the Power button down for more than 5 seconds. The LCD screen will then display the different pre-programmed charge profiles (AGM, gel, flooded, Lithium Ion). Use the button to navigate and confirm your selection.

Does the SCM25 have an output to power consumers?

Yes, the SCM25 is equipped with a switched 'Load' output capable of handling a maximum current of 25 A. This output can be used to power DC equipment, with built-in protection against overloads and short circuits.

What are the dimensions and weight of the SCM25 regulator?

The SCM25 dimensions are 135 x 190 x 75 mm (height x width x depth). Its weight is approximately 1.3 kg. These compact dimensions make it easy to install in tight spaces, such as on a boat or in a motorhome.

What is the power consumption of the SCM25 at night or without sunlight?

The SCM25's power consumption in the absence of solar production (at night) is extremely low, around 5 mA. This preserves the battery without unnecessarily discharging it. The controller automatically switches to sleep mode to reduce its power consumption.

Can I install the SCM25 in the same compartment as my batteries?

No, it is not recommended to install the SCM25 in the same compartment as the batteries. Batteries can release explosive gases and corrosive vapors. It is recommended to install it in a separate, well-ventilated location, protected from water spray.

What is the operating temperature range of the SCM25?

The SCM25 regulator can operate within an ambient temperature range of -20 °C to 55 °C. Above 40 °C, power is automatically reduced to protect internal components. Cooling is passive (fanless), making it silent.

Is the SCM25 compatible with 200 Wp solar panels?

Yes, the SCM25 is fully compatible with 200 Wp solar panels. The recommended power range is 200 to 700 Wp, which includes 200 Wp panels. At 12 V, the maximum power is 360 Wp, so a 200 Wp panel is within the limits.