Victron Smartsolar MPPT 75/15 15A 12V 24V Solar Charge Controller

The Smartsolar 75/15 from Victron Energy (MPN SCC075015060R) is an MPPT solar charge controller with a 15A max. charging current for charging 12V and 24V batteries. In contrast to the Bluesolar 75/15, the Smart version has integrated Bluetooth, which makes purchasing a Bluetooth dongle unnecessary. In addition, a VE.Direct connection is still available for communication with other Victron devices such as the Color Control GX or the MPPT Control.

The integrated Bluetooth in the SmartSolar series is the wireless solution for setting up, monitoring, and updating the controller using Apple and Android smartphones, tablets, or other devices.

Overview of the most important technical features

• 15A max. charging current, suitable for 12V and 24V batteries
• Nominal PV power for 12V systems: 220W
• Nominal PV power for 24V systems: 440W
• 15A load output
• High peak efficiency of 98%
• Freely programmable battery charging algorithm (via the free Victron Connect APP)
• Programmable light dimming functions (via the free Victron Connect APP)
• Ultra-fast Maximum Power Point Tracking
• Max. PV open circuit voltage: 75V
• Charging algorithm: multi-stage, adaptive
• Integrated Bluetooth module

Ultra-fast Maximum Power Point Tracking

Especially in cloudy weather, when light intensity changes constantly, an extremely fast MPPT controller improves energy yield by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers.

Intelligent Load Output

Deep discharge of the battery can be prevented by connecting all loads to the load output. The load output disconnects the loads when the battery has been discharged to a predefined voltage value. Alternatively, an algorithm for intelligent battery management can be selected: see BatteryLife.
The load output is short-circuit protected.

Battery Life: intelligent battery management

If the solar charge controller is unable to fully charge the battery within a day, the battery's status constantly alternates between "partially charged" and "end of discharge." This operating mode (no regular full charging) will damage a lead-acid battery within a few weeks or months.

The Battery-Life algorithm monitors the battery's state of charge and, if necessary, raises the load disconnect threshold day by day (i.e., the load is disconnected earlier) until the energy gained is sufficient to charge the battery to almost 100%. From this point on, the load disconnect threshold is modulated so that charging to almost 100% is achieved approximately once a week.