Votronic Solar Controller SR 550 Duo Digital

Solar regulator for motorhomes, caravans and boats. The solar regulator is specially designed for use in motorhomes and caravans and is suitable for all lead-acid battery types and makes (acid, GEL/dryfit and AGM/fleece batteries). Through intelligent microprocessor control, the batteries are charged optimally with IU1oU2 characteristics. The solar controller works fully automatic and maintenance-free and offers the following functions:

• Charge output board battery I , charge programs 1, 2 and 4 (gel, AGM, acid) adjustable to battery type.
• Charging output starter battery II: Separate secondary charging output with reduced charging current (12 V / 0.8 A or 1.5 A) for support charging and charge maintenance of the vehicle starter battery with protection against overcharging during long idle periods.
• The charging voltage is free of peaks and regulated to prevent overcharging of the batteries.
• Two battery charging outputs: automatic charging of the main or on-board battery (on-board I). Back-up charging as well as charge maintenance of the vehicle starter battery (Start II) with protection against overcharging.
• monitoring-free charging: Standard protection against battery back-discharge (in case of insufficient solar power e.g. dusk, night etc.), against overload and overheating.
• Buffer operation: Maintains charging characteristics even when operating simultaneously with loads on the battery.
• overcharge protection: regulates the charging current of the battery back in case of too much solar power and full battery, ensures the highest possible state of charge of the battery in case of power consumption by immediate recharging.
• "IU1oU2" charging characteristic: Defined charging voltage increase (U1) prevents harmful acid stratification and ensures equalization charging of the individual battery cells, then automatic trickle charging (U2).
• On-board filter: Built-in, allows easy parallel operation of the regulator with other charging sources, wind and gasoline generators, mains chargers, alternators, etc. on one battery.
• Connection for temperature sensor: Automatic adaptation of the charging voltage to the battery temperature. In cold weather, this results in a better full charge of the weaker battery; in summer temperatures, unnecessary battery gassing is avoided.
• Highly recommended if the battery is exposed to strong temperature fluctuations, e.g. in the engine compartment.
• Charging cable compensation: Voltage losses on the charging cables are automatically compensated.
• Measurement output for EBL (vehicle electric block): Allows convenient use of the (solar) current display built into the electric block to check the solar system.
• Please be sure to check the compatibility of your Schaudt electrical block (EBL) and the corresponding control and display panel in advance, as we cannot provide any warranty for this.
• Switching output "AES" (SR 350 CI and SR 550 CI only): Causes automatic switching of ELECTROLUX/DOMETIC refrigerators with "AES" (Automatic Energy Selector) from gas to 12 V operation in case of ample solar power surplus.
• Plug-ready for connection of Votronic solar display units LCD-Solar Computer S for optimal control of the system.

Nominal battery voltage (AC) in [V]: 12
Solar module power max. [Wp]: 550
Solar module current max. [A]: 35.0
Solar module voltage max. [V]: 28
Charging current Batt. I / II max. [A]: 35.0 / 1.5
Charging characteristic IU1oU2
Battery type adjustable: acid, gel, AGM
Self-consumption in [A]: 0.004
overcharge protection yes
Reverse current inhibition (night operation) yes
On-board power supply filter yes
Number of charge outputs: 2
Protection against overload, overheating, reverse polarity yes
Temperature sensor connection yes
Compensation of voltage losses on the charging cables yes
Connection LCD solar computer S yes
Output EBL solar current display yes
Temperature range [°C] -20 to +45
Dimensions in [mm] - dimensions incl. mounting flanges, without connections 131 x 77 x 40
Weight [g]: 170
Standards (CE)
Ambient conditions, humidity: max. 95% room humidity, non-condensing
Scope of delivery: operating instructions

Marine version: device with humidity protected electronics