Victron Energy
Victron BlueSolar MPPT 100/20 12V–48V Solar Charge Controller
Victron BlueSolar MPPT 100/20 12V–48V Solar Charge Controller
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Compact 20A MPPT Charging for 12V to 48V Systems
The Victron BlueSolar MPPT 100/20 delivers efficient, reliable solar charging without the added cost of built-in Bluetooth. Its versatile 100V solar input and 20A charging output support 12V, 24V, 36V and 48V battery systems, making it an excellent fit for RVs, boats, cabins, communications equipment and compact off-grid installations.
Victron’s ultra-fast MPPT technology continuously adjusts the solar operating point to maximize energy harvest as sunlight, temperature and shading conditions change. The integrated VE.Direct port also leaves plenty of options for future monitoring, configuration or integration with a Cerbo GX.
- Supports 12V, 24V, 36V and 48V battery systems
- Up to 20A of efficient MPPT battery charging
- 100V PV input supports flexible panel configurations
- Programmable load output with low-voltage protection
- VE.Direct port for optional monitoring and Victron integration
- Silent, fanless operation with up to 98% peak efficiency
- Backed by Victron Energy’s 5-year warranty
The BlueSolar and SmartSolar 100/20 provide the same core voltage and charging capacity, but the SmartSolar version adds built-in Bluetooth for easy setup, live monitoring and solar-production history through the VictronConnect app.
Unlike many compact 20A charge controllers, the BlueSolar 100/20 can be used with battery banks from 12V through 48V. It is one of Victron’s smaller options for maintaining or solar charging a modest 48V battery system.
| Battery System | Nominal Solar Capacity |
|---|---|
| 12V | Approximately 290W |
| 24V | Approximately 580W |
| 48V | Approximately 1160W |
A compatible 36V battery voltage can also be configured manually. Victron does not publish a separate nominal PV wattage for 36V systems.
The complete solar array must remain below the controller’s 100V maximum open-circuit voltage and 20A maximum PV short-circuit current. Solar-panel voltage rises in cold weather, so the array’s temperature-corrected Voc must remain below 100V during the coldest expected conditions.
BlueSolar models do not include built-in Bluetooth, but the integrated VE.Direct port provides several options for configuring, monitoring or integrating the controller:
- Add a VE.Direct Bluetooth Smart dongle for wireless VictronConnect access
- Connect to a computer using a VE.Direct-to-USB interface
- Connect to a Cerbo GX or compatible GX device using a VE.Direct cable
- Use a compatible wired Victron MPPT Control display
With a suitable interface, VictronConnect can display live solar and battery information, daily production history, charging settings, load-output operation, warnings and diagnostic information.
The BlueSolar 100/20 includes a dedicated load output that can power suitable DC equipment while helping protect the battery against excessive discharge. The output can disconnect loads at a selected low-voltage threshold or use Victron’s BatteryLife algorithm to adjust operation based on recent solar-charging performance.
| Battery Voltage | Maximum Continuous Load Current |
|---|---|
| 12V or 24V | 20A |
| 36V or 48V | 1A |
Inverters and other high-current equipment should normally connect directly to the battery through appropriately sized cable, fusing and switching. The load terminals are intended for suitable DC loads within the applicable current rating.
The BlueSolar 100/20 automatically detects a 12V, 24V or 48V battery system during its first power-up. A 36V battery voltage must be configured manually.
Changing the battery preset, selecting a lithium charging profile or creating custom charging settings requires access through the controller’s VE.Direct port. This can be done using a VE.Direct Bluetooth Smart dongle, a VE.Direct-to-USB interface or an optional MPPT Control display.
The BlueSolar 100/20 does not have a physical battery-type selector. If the factory settings are not appropriate for your battery, a compatible VE.Direct interface or MPPT Control display is required to select the correct charging profile before use.
With peak conversion efficiency of up to 98%, the BlueSolar 100/20 converts available solar energy into battery charging power with minimal losses. Natural convection cooling eliminates fan noise and reduces the number of moving parts in the installation.
The controller can provide its full rated output at ambient temperatures up to 40°C. At higher temperatures, charging current may be reduced automatically to protect the controller.
- RV and motorhome solar systems
- Camper vans and vehicle conversions
- Boats and marine electrical systems
- Off-grid cabins and remote buildings
- 48V battery maintenance and compact solar systems
- HAM radio and communications equipment
- Remote security and monitoring systems
- Service vehicles and mobile workstations
- Solar-powered lighting and control systems
- 20A maximum battery charging current
- 100V maximum PV open-circuit voltage
- 12V, 24V and 48V automatic battery-voltage selection
- Manually configurable 36V battery support
- Ultra-fast Maximum Power Point Tracking
- Advanced tracking under partial shading
- Multi-stage adaptive or user-defined charging
- Programmable DC load output
- Victron BatteryLife load-management algorithm
- VE.Direct communication port
- Optional Bluetooth using a VE.Direct Bluetooth Smart dongle
- Up to 98% peak efficiency
- Silent, fanless natural-convection cooling
- PV reverse-polarity, output short-circuit and over-temperature protection
| Specification | Value |
|---|---|
| Model | BlueSolar MPPT 100/20 |
| Victron Part Number | SCC110020170 |
| Supported Battery Voltages | 12V / 24V / 48V automatic selection 36V manually configurable |
| Rated Charge Current | 20A |
| Nominal PV Power | 12V: 290W 24V: 580W 48V: 1160W |
| Maximum PV Open-Circuit Voltage | 100V DC, including cold-weather voltage correction |
| Maximum PV Short-Circuit Current | 20A |
| PV Start-Up Requirement | PV voltage must exceed battery voltage by approximately 5V to begin charging |
| Peak Efficiency | 98% |
| Self-Consumption | 12V: 25mA 24V / 48V: 15mA |
| Charge Algorithm | Multi-stage adaptive or user-defined |
| Compatible Battery Types | LiFePO₄, AGM, gel and flooded lead-acid with appropriate settings |
| Communication | VE.Direct Bluetooth available with an optional VE.Direct Bluetooth Smart dongle |
| Load Output | 12V / 24V: 20A continuous 36V / 48V: 1A continuous |
| Power Terminals | Up to 6mm² / 10 AWG |
| Recommended Battery Fuse | 25A to 30A |
| Operating Temperature | -30°C to +60°C Full rated output up to 40°C |
| Protection Rating | IP43 electronic components IP22 connection area |
| Dimensions | 100 × 131 × 60mm |
| Weight | Approximately 0.65kg |
| Safety Standards | EN/IEC 62109-1 UL 1741 CSA C22.2 No. 107.1-16 |
| Warranty | 5 Year |
Specifications are believed to be accurate at the time of publication but may change without notice. While we make every effort to keep product information current, Sapphire Energy cannot guarantee all specifications are complete, error-free or up to date. Please refer to the manufacturer’s documentation if a particular specification is critical to your application. Contact us for help.
How do I select the correct battery type?
The BlueSolar 100/20 does not have a physical battery-type selector. Selecting a factory battery preset, lithium profile or custom charging settings requires a VE.Direct Bluetooth Smart dongle, a VE.Direct-to-USB interface or an optional MPPT Control display.
The controller automatically detects a 12V, 24V or 48V battery system during its first power-up, but voltage detection does not select a battery-specific charging profile. A 36V system must also be configured manually.
If you want to configure the controller directly from a phone without purchasing another accessory, the SmartSolar 100/20 includes Bluetooth.
What is the difference between BlueSolar and SmartSolar?
The main difference is Bluetooth. The BlueSolar 100/20 does not have Bluetooth built in, while the SmartSolar 100/20 can connect directly to a compatible phone or tablet through the VictronConnect app.
Both versions provide the same core 100V PV input rating, 20A charging capacity, battery-voltage support and VE.Direct connection. The BlueSolar is a good choice when Bluetooth is not needed or when the controller will be connected to a Cerbo GX. Bluetooth can also be added later using an optional VE.Direct Bluetooth Smart dongle.
If you want simple phone-based setup, live monitoring and history without purchasing another accessory, choose the SmartSolar version.
Can I monitor the BlueSolar 100/20 from my phone?
Yes, but an optional VE.Direct Bluetooth Smart dongle is required. The dongle connects to the controller’s VE.Direct port and allows a compatible phone or tablet to communicate through the VictronConnect app.
If you want Bluetooth included without a separate dongle, the SmartSolar 100/20 is the better choice.
Can it connect to a Cerbo GX?
Yes. The BlueSolar 100/20 has a VE.Direct port and can connect to a compatible Cerbo GX using a separately purchased VE.Direct cable.
Its solar-production and charging information can then appear in the GX interface and, when properly configured, the Victron VRM remote-monitoring portal.
Can it charge a 48V battery?
Yes. The BlueSolar 100/20 supports 48V battery banks and can provide up to 20A of battery charging current. Victron lists a nominal PV capacity of approximately 1160W when used with a 48V battery system.
The solar array must provide enough operating voltage to charge the battery while remaining below the controller’s 100V maximum PV open-circuit voltage. This creates a relatively narrow design window, so the individual panel specifications and cold-weather voltage must be checked carefully.
Can it charge a 36V battery?
Yes. A compatible 36V system voltage can be manually configured through the controller settings. It should not be assumed that the controller will automatically recognize a 36V battery during initial installation.
Configure the controller before connecting the solar array and confirm that the panel arrangement provides sufficient charging voltage without exceeding the 100V PV limit.
Can it charge lithium batteries?
Yes. The BlueSolar 100/20 can charge compatible LiFePO₄ batteries when the appropriate charging profile and voltage settings are selected.
Use the settings recommended by the battery manufacturer. Any required low-temperature charging protection must be supplied by the battery’s BMS or another suitable control system.
Can I connect more than the nominal solar wattage?
Some array oversizing may be possible because the controller limits its battery charging output to 20A. However, the array must always remain below the controller’s 100V maximum open-circuit voltage and 20A maximum PV short-circuit current.
Regularly installing substantially more solar than the controller can use may provide little additional benefit. Contact us with the panel specifications, battery voltage and proposed wiring arrangement if you would like the configuration checked.
What is the load output used for?
The programmable load output can power suitable DC loads and disconnect them when battery voltage becomes too low. It is rated for up to 20A on 12V and 24V systems, but only 1A when the controller is configured for a 36V or 48V battery.
Do not connect an inverter or other high-current appliance to the load output. These devices should connect directly to the battery through properly sized wiring and overcurrent protection.
What size battery cable and fuse should I use?
The controller accepts flexible copper conductors up to 6mm² or approximately 10 AWG. Cable size must account for charging current, circuit length, installation conditions and applicable electrical requirements.
Victron specifies a battery fuse between 25A and 30A. Install the fuse close to the battery’s positive connection and ensure its rating properly protects the installed cable.
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 vertically in a dry, ventilated location protected from direct rain, water spray, condensation and excessive heat. Leave adequate clearance above and below it for natural cooling.
What warranty does this product include?
The BlueSolar MPPT 100/20 is backed by Victron Energy’s 5-year limited warranty, providing substantially longer coverage than many basic solar charge controllers.
If you need troubleshooting or warranty assistance, Sapphire Energy will work with you throughout the process.
Tell us what solar panels 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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