The Specialists for Professional Solar Charging Technology

The VOTRONIC solar controllers are suitable for campers, caravans and boats, as well as for stationary operation in weekend houses, mountain huts etc. They are the link between solar module and battery, they work automatically and they ensure optimum battery charging. They are suitable for any type of rechargeable lead battery.

The units are distinguished by high operating safety and permanent readiness for operation. High-quality charging technique combined with intelligent microprocessor control ensures exact observation of the charging voltage rates, charging current rates and charging times and allows charging of two separate batteries. The main charging port with characteristic line IU1oU2 can be set ideally to acid/lead-acid batteries, gel or AGM/fleece batteries. The battery temperature sensor (recommendable accessories, order No. 2001) for temperature
compensation effects automatic increase of the charging voltage in case of low temperatures (winter operation) in order to improve and accelerate full charging of the weak battery. In case of summery temperatures, the charging voltage is reduced to minimize the load (gassing) of the battery and to extend the lifetime of gas-tight batteries (such as gel batteries). The second charging port is provided for support charging and conservation of charge of the vehicle’s starter battery in case of extended stop periods.

The charging controllers are suitable for any solar module being commercially available, and they are adapted to the different capacity rates of the solar modules. Optimum energy yield is achieved by two different control methods: The VOTRONIC controllers SR are designed according to the proved shunt controller method. This method is a widespread, simple, reliable, and - above all - an economic control method.

MPP controllers with maximum power point control method require an expensive design. But reduced charging time and higher charging current ensure an optimum yield of the panel capacity. The units automatically determine the optimum power yield (MPP) from the solar module and transform the voltage surplus from the solar module into a charging current increase for the battery. These processes will be measured, calculated and executed several times per second, thus ensuring an optimum adaptation of the solar module to the battery and the best possible power yield of the solar system. In contrast to conventional controllers, the charging current is increased by 10 - 30 %. This advantage shows particularlyin cooler times of the year or in case of cold solar modules.

How much energy does my solar system really supply? Is it correctly dimensioned, are the panels shaded or soiled or is there even an installation error? VOTRONIC offers power measurement units giving the answer to these questions. When being plugged into the VOTRONIC solar charging controllers, the desired information is given comprehensively and immediately.

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