Solar Charge Controller Victron SmartSolar MPPT 75/15 for 12 + 24 Volt, with Bluetooth
Manufacturer Description:
1.1 Built-in Bluetooth Smart: No Dongle Required
Provides a wireless solution for setting up, monitoring, and updating the controller using Apple or Android smartphones, tablets, or other devices.
1.2 VE.Direct
For a wired data connection to a Color Control panel, PC, or other devices.
1.3 Ultra-Fast MPPT Tracking
Especially under cloudy conditions, when light intensity constantly changes, the fast MPPT algorithm increases energy yield by up to 30% compared to PWM charge controllers and up to 10% compared to slower MPPT controllers.
1.4 Load Output
To prevent battery overcharging, all loads can be connected to the load output. The load output disconnects the loads when the battery reaches a predefined low voltage. Alternatively, an intelligent BatteryLife management algorithm can be used (see section 1.5).
The load output is short-circuit protected. High inrush current loads are best connected directly to the battery. If a remotely controlled input is available, these loads can be managed via the controller’s load output. A special interface cable may be required (see section 3.7). Alternatively, a BatteryProtect can be used to control the load; technical details are on the Victron website.
1.5 BatteryLife: Intelligent Battery Management
If the solar charge controller cannot fully charge the battery in a day, the battery cycles between "partially charged" and "end of discharge," which can damage lead-acid batteries within weeks or months.
The BatteryLife algorithm monitors the battery state and gradually increases the load disconnect threshold day by day until the harvested energy is sufficient to charge the battery close to 100%. Once this is reached, the threshold is modulated so that full charging occurs approximately once per week.
1.6 Internal Temperature Sensor
Compensates the constant and float voltages based on temperature.
1.7 Automatic Battery Voltage Detection
The controller automatically detects 12 V or 24 V systems only once. Any later change in system voltage must be done manually, e.g., via the Bluetooth app (see section 1.9).
1.8 Three-Stage Charging
The controller is configured for a three-stage charging process: Bulk – Absorption – Float. See sections 3.8 and 5 for standard settings. Section 1.9 covers configurable settings.
1.8.1 Bulk: Constant Current Phase – provides maximum current to quickly charge the battery. 1.8.2 Absorption: Constant Voltage Phase – once the battery reaches the absorption voltage, the controller switches to constant voltage mode. Short discharges keep this phase short to prevent overcharging; deep discharges automatically extend the absorption phase. Ends when charge current drops below 1A. 1.8.3 Float: Maintenance Phase – applies float voltage to keep the battery fully charged. If battery voltage drops below float voltage for at least 1 minute, a new charging cycle begins. 1.8.4 Equalization – see section 3.8.1.
1.9 Configuration and Monitoring
Built-in Bluetooth Smart: Connect to an iOS or Android smartphone or tablet. VE.Direct to USB cable (ASS030530000) for PC connection, Android smartphones with USB OTG (additional OTG cable required). VE.Direct to VE.Direct cable for MPPT Control or Color Control panel connection.
Various parameters can be customized using the VictronConnect app, downloadable from the Victron website.
A technical datasheet and user manual can be sent via email upon request.
1.1 Built-in Bluetooth Smart: No Dongle Required
Provides a wireless solution for setting up, monitoring, and updating the controller using Apple or Android smartphones, tablets, or other devices.
1.2 VE.Direct
For a wired data connection to a Color Control panel, PC, or other devices.
1.3 Ultra-Fast MPPT Tracking
Especially under cloudy conditions, when light intensity constantly changes, the fast MPPT algorithm increases energy yield by up to 30% compared to PWM charge controllers and up to 10% compared to slower MPPT controllers.
1.4 Load Output
To prevent battery overcharging, all loads can be connected to the load output. The load output disconnects the loads when the battery reaches a predefined low voltage. Alternatively, an intelligent BatteryLife management algorithm can be used (see section 1.5).
The load output is short-circuit protected. High inrush current loads are best connected directly to the battery. If a remotely controlled input is available, these loads can be managed via the controller’s load output. A special interface cable may be required (see section 3.7). Alternatively, a BatteryProtect can be used to control the load; technical details are on the Victron website.
1.5 BatteryLife: Intelligent Battery Management
If the solar charge controller cannot fully charge the battery in a day, the battery cycles between "partially charged" and "end of discharge," which can damage lead-acid batteries within weeks or months.
The BatteryLife algorithm monitors the battery state and gradually increases the load disconnect threshold day by day until the harvested energy is sufficient to charge the battery close to 100%. Once this is reached, the threshold is modulated so that full charging occurs approximately once per week.
1.6 Internal Temperature Sensor
Compensates the constant and float voltages based on temperature.
1.7 Automatic Battery Voltage Detection
The controller automatically detects 12 V or 24 V systems only once. Any later change in system voltage must be done manually, e.g., via the Bluetooth app (see section 1.9).
1.8 Three-Stage Charging
The controller is configured for a three-stage charging process: Bulk – Absorption – Float. See sections 3.8 and 5 for standard settings. Section 1.9 covers configurable settings.
1.8.1 Bulk: Constant Current Phase – provides maximum current to quickly charge the battery. 1.8.2 Absorption: Constant Voltage Phase – once the battery reaches the absorption voltage, the controller switches to constant voltage mode. Short discharges keep this phase short to prevent overcharging; deep discharges automatically extend the absorption phase. Ends when charge current drops below 1A. 1.8.3 Float: Maintenance Phase – applies float voltage to keep the battery fully charged. If battery voltage drops below float voltage for at least 1 minute, a new charging cycle begins. 1.8.4 Equalization – see section 3.8.1.
1.9 Configuration and Monitoring
Built-in Bluetooth Smart: Connect to an iOS or Android smartphone or tablet. VE.Direct to USB cable (ASS030530000) for PC connection, Android smartphones with USB OTG (additional OTG cable required). VE.Direct to VE.Direct cable for MPPT Control or Color Control panel connection.
Various parameters can be customized using the VictronConnect app, downloadable from the Victron website.
A technical datasheet and user manual can be sent via email upon request.