Product specifications

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Mastervolt Guarantee Plan • 5-year product warranty • worldwide service • 48-hour replacement service
Mastervolt is pleased to announce its latest product release, the
Solar ChargeMaster range, offering a 20 and a 40 A solar charge
controller. This range has been developed using Mastervolt's 16
years of excellent expertise in the field of battery charging
technologies.
The Solar ChargeMaster was designed specifically to meet the
needs of rural solar electrification and small PV systems for tele-
com, remote cabins, weekend homes, and RV/ caravans and
boats.The new product range is a welcome addition to
Mastervolt's already extended portfolio, which includes a wide
variety of maintenance free batteries, sine wave inverters and
inverter/charger combinations, amp hour counters, battery
chargers and DC-AC distribution components.
Adding an advanced solar controller is fitting entirely into the
famous Mastervolt system approach which is now becoming
reality in the autonomous solar field as well.
Mastervolt developed the Solar ChargeMaster series to
guarantee an optimum charging process with cost efficiency. This
highly advanced equipment converts unstable current from the
solar panels into accurate charge current.
The 3-step charging method guarantees that batteries will be
charged safely and efficiently under all circumstances.
A battery temperature sensor is standard, designed to regulate
the optimum charge voltage at each temperature, to prolong the
lifespan of the battery.
Mastervolt advanced solar charge controller
SCM-N 20 SCM-N 40
Article no. 131802000 131804000
Charge current 20 A 40 A
Max. DC load 20 A 40 A
System voltage 12/24 V auto detect 12/24 V auto detect
DC grounding negative ground
(the negative terminals are connected internally)
No load < 4 mA < 4 mA
Functions LCD display ------ battery status/V/A/charge & discharge ------
Connections screw terminal screw terminal
Settings --- load/disconnect, 3-step charging algorithm ---
Dimensions (hxwxd) 41 x 140 x 105 41 x 140 x 105
Protection degree enclosure IP20 IP20
Weight 189 gr 189 gr
Desc r i p tion o f f u nctio n s
• The charge controller protects the battery from being
overcharged by the solar array and from being discharged too
deeply by the load.
• The charge controller adjusts itself automatically to 12 V or
24 V system voltage.
• Pushbutton to switch the load on and off.
• The charge controller can be programmed for lighting
applications.
• Many safety and display functions.
• Negative ground.
• Battery type presets.
• Equalization charge selecteable.
Disp l a y mode
In normal operation mode the controller displays the state of
charge (available energy) of the battery. Any change of the state
of charge (SOC) to a lower status is additionally signaled
acoustically. The display percentage corresponds to the available
energy until Low Voltage Disconnect in relation to a fully charged
battery.
As long as the solar array supplies enough voltage to charge the
battery, this is indicated by up-moving bars alternately to the
state of charge display.
Load m a n ageme n t
In normal operation the loads can be switched on and off by
pushing the button. This is indicated in the display.
A
dvan c e f eatur e s
Low voltage disconnect function: The solar charge controller
has multiple modes to protect the battery from being discharged
and is factory programmed to the following load settings;
disconnect at 11.4 V up to 11.9 V.
Nighlight timer function: The controller comes with a
sophisticated nightlight function. It controls the load output at
night. The controller recognizes day and night based on the solar
open circuit voltage. In the programming menu this day and night
threshold setting can be modified according to the requirements
of the local conditions and solar array used (management for
Streetlights).
Advanced programming function: The controller has an
advanced programming mode for the setting of advanced
features. Battery setting, low voltage disconnect setting,
nightlight function and enable of acoustic alarm can be set to
customers demands. The setting can be secured and locked by
the programming lock-mode.
Solar ChargeMaster product specifications