Victron Energy
Victron SmartSolar MPPT 75/15 Solar Charge Controller (Bluetooth)
Victron SmartSolar MPPT 75/15 Solar Charge Controller (Bluetooth)
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Compact, Reliable MPPT Solar Charging
The Victron SmartSolar MPPT 75/15 Solar Charge Controller maximizes the energy harvested from your solar panels while safely charging 12V or 24V battery systems. Featuring built-in Bluetooth, advanced Maximum Power Point Tracking technology and Victron's renowned reliability, it is an excellent choice for RVs, camper vans, boats, cabins, communications equipment and compact off-grid solar installations.
Capable of delivering up to 15A of battery charging current, the SmartSolar 75/15 supports approximately 220W of solar on a 12V battery system or 440W on a 24V battery system. Its compact size, programmable load output and flexible charging settings make it especially useful for small, professionally designed solar systems.
Pair the SmartSolar 75/15 with the Lumera 220W Flexible Solar Panel for a compact 12V charging system. Its lightweight, flexible construction makes it a fantastic choice for marine and mobile applications where weight and mounting options matter.
Why You'll Love It
- Built-in Bluetooth monitoring with the VictronConnect app
- Advanced Maximum Power Point Tracking technology
- Automatically supports 12V and 24V battery systems
- Up to 15A of battery charging current
- Programmable 15A load output with low-voltage protection
- VE.Direct connectivity for Victron system integration
MPPT technology continuously adjusts the operating point of your solar panels to capture as much available energy as possible as sunlight, temperature and weather conditions change throughout the day.
Built-in Bluetooth Monitoring
Built-in Bluetooth gives you instant access to your SmartSolar controller through the free VictronConnect app. Check your solar production, charging status and battery information without opening an electrical cabinet or adding a separate display.
- View live solar production details
- Monitor battery and PV voltage
- Review daily production and charging history
- Adjust charging and load-output settings
- Access up to 46 days of stored trend data
Live status and historical solar production in the free VictronConnect app.
Typical Solar Array Sizing
The SmartSolar 75/15 is designed for compact solar arrays on 12V and 24V battery systems.
| Battery System | Nominal Solar Array |
| 12V Battery Bank | Up to approximately 220W |
| 24V Battery Bank | Up to approximately 440W |
These figures are general sizing guidance. The correct solar array depends on battery voltage, individual panel specifications, wiring configuration, installation location and minimum expected temperature. The array's cold-weather open-circuit voltage must remain below the controller's 75V maximum, and total PV short-circuit current must remain within its 15A rating. Not sure whether your panels are a suitable match? Contact us for help and we will be happy to review your proposed configuration.
Solar-panel open-circuit voltage increases as temperature falls. The complete array's temperature-corrected Voc must remain below 75V during the coldest expected conditions—not only under the panel's standard test conditions.
Battery Cable & Fuse Recommendations
Short, properly sized battery cables help reduce voltage drop, heat and charging losses. The SmartSolar 75/15 accepts conductors up to 6mm² (10 AWG), which is the maximum cable size that will physically fit its power terminals.
| Installation Component | Recommendation |
| Battery Cable | 6mm² (10 AWG) fine-stranded copper |
| Maximum Terminal Capacity | 6mm² (10 AWG) |
| Recommended Battery Fuse | 20A to 30A DC fuse |
Victron suggests a battery fuse in the 20A to 25A range for the SmartSolar 75/15. The final fuse must also be appropriately selected to protect the installed battery cable and comply with applicable electrical requirements.
Not sure which fuse or cable is appropriate for your installation? Contact us for help and we will be happy to help you select the right components.
Programmable Load Output
The SmartSolar 75/15 includes a dedicated 15A load output for suitable small DC loads. It can automatically disconnect the load when battery voltage becomes too low, helping protect the battery from excessive discharge.
Load-output behaviour can be configured through VictronConnect. Victron's intelligent BatteryLife mode can also adjust the disconnect threshold based on the battery's recent state of charge and the amount of solar energy available.
Inverters and other high-current equipment should normally be connected directly to the battery through appropriately sized cable, fusing and switching. The controller's load terminals are intended for suitable DC loads drawing no more than 15A.
VE.Direct Connectivity
The integrated VE.Direct communication port allows the SmartSolar 75/15 to connect with compatible Victron monitoring equipment, including Cerbo GX systems, VE.Direct USB interfaces and other supported accessories.
This makes it easy to include the controller in a larger Victron installation with centralized system monitoring, historical data and remote access through compatible GX equipment.
Additional cables or communication accessories may be required depending on the equipment being connected. Planning a larger Victron system? Contact us for help confirming the components required for your installation.
Flexible Battery Charging
The SmartSolar 75/15 uses a multi-stage adaptive charging algorithm and can be configured for a wide range of battery systems. Charging parameters can be adjusted through VictronConnect, or one of the available pre-programmed charging profiles can be selected.
This flexibility makes the controller suitable for properly configured LiFePO₄, flooded lead-acid, AGM and gel battery systems. Always follow the charging recommendations provided by the battery manufacturer.
A compatible Victron Smart Battery Sense or BMV-712 Smart Battery Monitor can transmit battery voltage and temperature data to the controller through Victron's wireless network. This can improve charging accuracy when voltage drop or changing battery temperature is a concern.
Efficient, Fanless Operation
With a maximum conversion efficiency of up to 98%, the SmartSolar 75/15 converts available solar energy into battery charging power with minimal losses. Its fanless design also eliminates fan noise and reduces the number of moving parts in the installation.
The controller can provide its full rated output current at ambient temperatures up to 40°C. At higher temperatures, output may be reduced automatically to protect the controller.
Built-In Electronic Protection
The SmartSolar 75/15 includes internal protection to help safeguard the controller during abnormal operating conditions.
- PV reverse-polarity protection
- Output short-circuit protection
- Over-temperature protection
- Automatic power reduction at high temperatures
- Internal temperature-compensated charging
- Recovery charging for deeply discharged batteries
Built-in controller protection does not replace properly selected external wiring, fuses, disconnects or overcurrent protection. Solar and battery circuits must remain within the controller's published voltage and current limits.
Applications
- RV and motorhome solar systems
- Camper vans and vehicle conversions
- Boats and marine battery systems
- Flexible-panel solar installations
- Off-grid cabins and sheds
- HAM radio and communications equipment
- Remote monitoring and security systems
- Service trailers and mobile workstations
- Lighting and other low-power DC systems
- 12V and 24V LiFePO₄ battery banks
Product Specifications
| Specification | Value |
|---|---|
| Model | SmartSolar MPPT 75/15 |
| Victron Part Number | SCC075015060R |
| Battery Voltage | 12V / 24V automatic selection |
| Rated Charge Current | 15A |
| Nominal PV Power — 12V / 24V | 220W / 440W |
| Maximum PV Open-Circuit Voltage | 75V DC, including cold-weather voltage correction |
| Maximum PV Short-Circuit Current | 15A |
| PV Start-Up Requirement | PV voltage must exceed battery voltage by approximately 5V to start |
| Maximum Efficiency | 98% |
| Self-Consumption | Approximately 10mA |
| Default Absorption Voltage | 14.4V / 28.8V, adjustable |
| Default Float Voltage | 13.8V / 27.6V, adjustable |
| Charge Algorithm | Multi-stage adaptive or user-defined |
| Compatible Battery Types | LiFePO₄, AGM, gel and flooded lead-acid with appropriate settings |
| Communication | Built-in Bluetooth Smart and VE.Direct |
| Stored Trend History | 46 days |
| Load Output | 15A continuous, programmable |
| Power Terminals | 6mm² (10 AWG) maximum |
| Recommended Battery Fuse | 20A to 25A |
| Operating Temperature | -30°C to +60°C; full rated output up to 40°C |
| Protection Rating | IP43 electronics / IP22 connection area |
| Dimensions | 100 × 113 × 40mm |
| Weight | Approximately 0.5kg |
| Safety Standards | EN/IEC 62109-1, UL 1741 and CSA C22.2 No. 107.1-16 |
| Warranty | 5-Year |
Specifications are based on the manufacturer's published data and are believed to be accurate at the time of publication. Product specifications, certifications and dimensions may change without notice. Always verify compatibility with your specific equipment and refer to the official Victron documentation before installation. If you have any questions, contact us and we'll be happy to help.
Frequently Asked Questions
Can I use a 220W solar panel with this controller?
Yes. A compatible 220W panel is an excellent nominal match for the SmartSolar 75/15 on a 12V battery system. The Lumera 220W Flexible Solar Panel is particularly well suited to marine and mobile applications.
Compatibility still depends on the panel's Voc, cold-weather corrected Voc and short-circuit current. The panel must remain within the controller's 75V maximum PV voltage and 15A maximum PV short-circuit current.
Can I connect more than 220W on 12V or 440W on 24V?
Some array oversizing may be possible because the controller automatically limits its charging output to 15A. However, the array must always remain within the controller's 75V maximum open-circuit voltage and 15A maximum short-circuit current.
Regularly connecting substantially more solar than the controller can use may produce little additional benefit. A larger controller may be a better choice for a higher-powered array.
Can it charge lithium batteries?
Yes. The charging settings can be configured for a compatible 12V or 24V LiFePO₄ battery through the VictronConnect app.
Use the charging voltages recommended by the battery manufacturer and confirm that any required low-temperature charging protection is provided by the battery's BMS or another suitable control method.
Does Bluetooth require an internet connection?
No. Your phone or tablet connects directly to the controller through Bluetooth for local setup, monitoring and history review.
Internet access may be required to download or update the VictronConnect app, but it is not required for normal local Bluetooth communication.
What is the load output used for?
The programmable 15A load output can power suitable small DC loads and disconnect them if battery voltage becomes too low. Its behaviour can be configured through VictronConnect or managed using Victron's BatteryLife mode.
Do not connect an inverter or another high-current appliance to the load output. These loads should be connected directly to the battery through appropriately sized cable and overcurrent protection.
Can it connect to a Cerbo GX?
Yes. The controller includes a VE.Direct port and can connect to a compatible Cerbo GX using a separately purchased VE.Direct cable.
This allows its solar production and charging status to be incorporated into a larger Victron monitoring system. Remote monitoring is also available when the GX system is properly connected to the internet and configured with the Victron VRM portal.
What size battery cable should I use?
For a typical full-output installation, short runs of 6mm² (10 AWG) fine-stranded copper cable are recommended. This is also the largest conductor size accepted by the controller's power terminals.
Cable requirements may vary with run length, installation method, conductor temperature rating and applicable electrical requirements.
What size fuse should I use?
Victron specifies a 20A to 25A battery fuse for the SmartSolar 75/15. The fuse should be installed close to the battery positive connection.
The final fuse rating must also protect the installed cable and comply with the requirements of the installation.
Will it charge a completely discharged battery?
The controller includes a deeply discharged battery recovery function and can begin charging from very low battery voltage when sufficient solar input is available.
It can also reconnect to some lithium batteries whose internal BMS has disconnected the cells. Recovery still depends on the battery design, BMS behaviour and the condition of the battery.
Can I install the controller outdoors?
The electronic components are rated IP43 and the connection area is rated IP22. This is not equivalent to a fully weatherproof outdoor enclosure.
Install the controller in a dry, ventilated location protected from direct rain, water spray, condensation and excessive heat.
What warranty does this product include?
The Victron SmartSolar MPPT 75/15 is backed by a 5-year manufacturer's warranty from Victron Energy, one of the industry's most respected names in off-grid and marine power systems.
If you have a warranty question or need assistance with troubleshooting, Sapphire Energy is here to help. We'll work with you throughout the warranty process to get your system back up and running as quickly as possible.
Tell us which solar panel and battery you're using, and we'll help confirm compatibility, recommend the correct wiring and fuse protection, and answer any questions before you order. We're happy to review your system and make sure everything works together.
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