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This controller is especially designed for a marine usage, e.g. on boats, yachts,... All it's components are protected from humidity.

- up to 250Wp module performance
- max. 15A module current
- max. 50V module voltage

Controllers according to the MPP technology are continuously and automatically calculating the maximum power yield (MPP) of the solar modules several times per minute.
The voltage surplus of the solar module will be transformed to a higher charging current for the battery (realised by high-frequency switching controller technology with high efficiency). This surplus of charging current ensures short charging times and the best possible power yield of the solar system.

  • Main Charging Port I: Automatic charging and conservation of charge of the (main) board supply battery
  • Auxiliary Charging Port II: Current and voltage reduced for recharging as well as trickle charge of the vehicle’s starter battery, thus ensuring continuous starting capacity
  • Continuous control, full batteries by immediate recharging in case of current consumption
  • Automatic charging programs adjustable for gel, acid/lead-acid and AGM/fleece batteries for optimum charging results
  • Indicators for operating state "Full", "Charging", "MPP" and "Low Voltage"
  • Very low own electricity consumption, high efficiency
  • Connection for Battery Temperature Sensor for temperature compensation
Bedienungsanleitung_MPP-250-Duo-Digital.pdf Download
Ambient temperature: -20°C - +45°C
Battery type adjustable: Acid, Gel, AGM, LiFePO4
Charge controller type: Dual-MPPT
Charging characteristic: IU1oU2
Charging timer: 4-fold
Charging voltage: max. 15V
Connection options: LCD Solar Computer S
Device fuse FKS: 20A
Manufacturer: Votronic
Number of charging outputs: 2
On-board power supply filter: yes
Pre-charge current: max. 9A (deepest discharged battery:
Protective functions: Reverse current lock (night), overload, overheating, charging, reverse polarity
Refrigerator control output (AES): yes
Reset voltage: 12,7V
Scope of application: indoor area
Solar charging current living area battery: yes
Solar module - power (max.): 250W
Solar module current (max.): 15A
Solar module voltage (max.): 50 V/DC
Switching current control output (AES): 12V/0,2A
System voltage: 12V DC
Temperature controlled cooling fan: yes
Version: Marine (boat version)
Weight: 210 g
max. charging current: Battery1: 18A Battery2: 1A
max. load current: 18A Reviews with
Können verschiedene Batterietypen angeschlossen werden, z.B. als Starterbatterie eine Blei-Säure und als Boardbatterie eine LiFePO4-Batterie?
Ja, dies ist problemlos möglich. Der zusätzliche Ladeausgang für die Starterbatterie dient rein als Erhaltungsladung mit max. 1A. Eine Vollladung ist damit nicht möglich. Die Batterieeinstellungen beziehen sich rein auf den Boardbatterie-Ausgang.
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