Solar Charging Controller SR 530 Duo Digital

Article-No. 1625



SR 330 1620

For Solar Modules with:

max. 530 Wp Module Capacity

max. 33 A Module Current

max. 28 V Module Voltage

Charging Options:

Batterien 1S

1 Supply- and 1 Starter Battery


Please notice, that the device is only suitablte for solar panels up to the maximum power (Wp) and below the maximum persmissable voltage (Voc). In addition the controller is not suitable for an input-side connection (+/- solar panels) of wind, water, fuel or motor generators, power supplies, batteries or other current sources.

For campers, caravans and boats. The solar controller is a special development for use in campers and caravans, and it is suitable for all types and makes of lead batteries (also for acid, GEL/dryfit, AGM/fleece batteries, as well as LiFePO4 batteries). Optimum charging is ensured by an intelligent microprocessor control with characteristic lines IU1oU2. Working fully automatically and maintenance-free, the solar controller offers the following functions:

  • Charging port board battery I, depending on the type of battery (lead or LiFePO4), 3 or 5 charging programs selectable.
  • Charging Port Starter Battery II: Separate auxiliary charging port with reduced charging current (12 V (0.8 A or 1.5 A) for support charging and trickle charging of the vehicle’s starter battery with overcharge protection in case of extended stop periods.
  • The charging voltage being free from peaks is controlled in such a way, that any overcharging of the batteries is excluded.
  • Two Battery Charging Ports: Automatic charging of the main battery or board battery (Board I): Support charging and trickle charging of the vehicle's starter battery (Start II) with overcharge protection.
  • Unattended Charging: Standard protection against back discharge of battery (in case of insufficient solar power (such as at twilight, at night etc.) and against overload and overheating.
  • Floating Operation: Observation of the characteristic lines of charging, even with simultaneous operation of consumers being connected to the battery.
  • Overcharge protection: Reduction of the charging current of the battery in case of excessive solar power and full battery. Immediate recharging in case of power consumption to ensure always the best possible charging state of the battery.
  • Characteristic Line of Charging "IU1oU2": A defined charging boost (U1) avoids harmful acid accumulation and provides compensation charge to the individual battery cells. After that, automatic trickle charging (U2).
  • On-board Mains Suppression Filter: Integrated on-board mains suppression filter ensures unproblematic parallel operation of the controller with other charging sources, wind- and petrol-driven generators, mains supply chargers, dynamos etc. at one battery.
  • Connection for Temperature Sensor: Automatic adaptation of the charging voltage to the battery temperature. In case of low outside temperatures, full charging of the weaker battery is improved, and in case of summery temperatures unnecessary battery gassing will be avoided.
    This is highly recommended, if the battery is exposed to strong variations in temperature, such as in the motor compartment.
  • Charging Cable Compensation: Automatic compensation of voltage losses on the charging cables.
  • Measurement Output for EBL (Electroblock of the Vehicle): Allows convenient application of the (solar) current display being installed in the electroblock for supervision of the solar system.
    Please check in advance the compatibility of your Schaudt Electrobloc (EBL) and the corresponding control panel, because we are not able to give any warrenty for this.
  • Terminal „AES“ (only SR 330 Duo Dig. and SR 530 Duo Dig.): Automatic commutation of ELECTROLUX / DOMETIC refrigerators with “AES” (Automatic Energy Selector) from gas operation to 12 V operation in case of excess solar power.
  • Ready for connection of the VOTRONIC Solar Display LCD-Solar Computer S for optimum control of the system.
  • Indicators for operating state "AES", "Full", "> 80%", "Charging" and "Low Voltage"
  • Control output EBL, prepared for “Elektroblock” with solar current display, cable set, Art. 2007, required
  • Terminal "AES" with LED display:
    Automatic commutation of Dometic/ELECTROLUX refrigerators from gas operation to 12 V-operation in case of sufficient solar power by means of “AES” (Automatic Energy Selector)

Technical Details

 Nominal Operating Voltage (AC) in [V] 12
 Capacity Solar Module max. [Wp] 530
 Current Solar Moddule max. [A] 33.0
 Voltage Solar Module max. [V] 28
 Charging Current Batt. I / II max. [A] 33.0 / 1.5
 Characteristic Line of Charging IU1oU2
 Battery Type adjustable Acid/Lead-Acid, Gel, AGM, LiFePO4
 Current Consumption Stand-by in [A]
 Overcharge Protection yes
 Reverse Current Protection (during the night)
 On-board mains suppression filter
 Number of Charging Ports 2
 Protection against Overload, Overtemperature, Short-circuit
 Connection for Temperatur-Sensor
 Compensation of voltage loss on charging cables yes
 Connection for LCD-Solar-Computer S
 Signal Output "EBL" for Display "Solar" Charging Current Battery
 Temperature Range [°C] -20 to +45
 Dimensions in [mm] - Dimensions incl. mounting flanges, without connections 131 x 77 x 40
 Weight in [g] 170
 Mark of conformity (CE)
 Ambient Conditions, Humidity of Air:  max. 95 % RH, No Condensation
 Delivery Scope: Operating Manual

Charging Programs

1 „Gel“: Charging Program for Gel Batteries, Characteristic Line IU1oU2
Adapted to closed, gas-tight gel/dryfit batteries with determined electrolyte, which are generally requiring a higher charging voltage level and longer dwell times U1 to achieve short charging times with particularly high capacity storage and to avoid total discharge. Also recommended for EXIDE MAXXIMA a high-current battery in AGM filament technology.

2 „AGM“: Charging Program for AGM/Fleece Batteries, Characteristic Line IU1oU2
Adapted to charging closed, gas-tight AGM (absorbed glass mat) batteries and batteries in lead-fleece technology requiring a particularly high level U1 with adapted dwell times for full charging and after that a moderate level U2 for trickle charge (round cell and plate technology).

4 „UNIVERSAL“: Charging Program for Lead, Acid/Lead-Acid Batteries: Characteristic Line IU1oU2
Universal program for charging and conservation of charge of acid batteries in vehicles (mixed operation mobile/stationary). Still offers short charging times, good charging factor and good acid mixing with average level U1 for open and closed, low-maintenance, maintenance-free standard, drive, lighting, solar and heavy duty batteries.

Li „LiFePO4“: Charging Program for Lithium Batteries, Characteristic Line IU1oU2
Charging program for lithium LiFePO4 batteries with completely integrated electronic system and safety circiut (BMS).


Anleitung Anleitung


LCD-Solar-Computer S 1250

 Aktueller Solarstrom    Solarbatteriespannung    EBL Kabelsatz 2007

Solar Current




Cable Set EBL
(Art. 2007)

 Eingeladene Solarkapazitaet    Eingeladene Solarenergie  
Temp Sensor 2001

LCD-Solar-Computer S
(Art. 1250)

Solar Capacity


Solar Energy


Temperature Sensor 825
(Art. 2001)

Solar Data Extender 1440

The Solar Data Extender combines the data from up to three solar controllers so that they can be shown on a single display. The usual LCD displays (e.g. LCD solar computer S or VPC combination panel) can still be used. It is compatible with the following devices:

  • Solar Charging Controllers in SR- und MPP-Technology (from Serial-No. 14Vxx.xxxxx)
  • Battery Charger Series VBCS Triple
  • LCD-Solar-Computer S (from Serial-No. 15V40.xxxxx)
  • VPC Combi Panel with Solar Function
  • Bluetooth Connector S-BC

Solar Data Extender 3n1
(Art. 1440)


BootAlso available with humidity-proof electronic system:
Solar Charging Controller SR 530 Duo Dig. 
(Art. 11625)


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