Victron Energy BlueSolar MPPT Solar Charge Controller 100V 20A 48V — MPPT harvesting, Bluetooth-ready

The Victron Energy BlueSolar MPPT 100V, 20A (48V) is a maximum power point tracking solar charge controller that converts more available sunlight into battery-ready energy while protecting battery life.

Compact yet powerful, this BlueSolar MPPT controller is designed for off-grid systems, mobile installations and small to medium battery banks that need efficient, reliable charging. It supports up to 100V PV input and delivers controlled charging at up to 20A for 48V battery systems. Built with Victron’s fast-tracking MPPT algorithms, it improves harvest from panels under changing light and partial shade, and offers optional remote monitoring via a separately sold Bluetooth dongle.

How does the BlueSolar MPPT get more power from my panels?

Victron’s MPPT electronics continuously search for the panel voltage that yields the highest output. When conditions change—clouds, temperature shifts, or partial shading—the controller re-optimizes, reducing lost production and increasing daily energy yield.

• High-speed MPPT algorithm for fast response to irradiance changes
• Operates with PV input voltages up to 100V for flexible array configurations
• Designed to reduce mismatch losses when panels are partially shaded

What system sizes and batteries are compatible with this model?

This unit is sized for small-to-medium 48V battery systems and solar arrays where a 20A charging rate is appropriate. It’s suitable for RVs, small off-grid cabins, auxiliary battery banks, and compact marine installations, provided the panel array and battery specifications match the controller limits.

• Nominal charge current: 20A at 48V battery systems
• PV input rating up to 100V allows versatile panel wiring
• Works with lead‑acid or lithium batteries when set to the correct charge profile

Can I monitor and adjust settings remotely?

The BlueSolar MPPT itself does not include built-in Bluetooth, but you can add Victron’s Bluetooth dongle (sold separately) to enable wireless monitoring and configuration through VictronConnect. With the dongle attached, you can view live statistics, alter charge parameters and download logs from your smartphone or tablet.

• Bluetooth dongle enables VictronConnect mobile app access
• Remote firmware updates and parameter adjustments possible via app
• Local LED indicators provide basic status without wireless access

How does the BlueSolar protect my batteries and electronics?

Beyond harvesting power, the controller implements intelligent charge stages and safety features to extend battery life and prevent system damage. It prevents overcharging, limits current during high input, and communicates faults via status indicators so you can address wiring or panel problems quickly.

• Multi-stage charging profiles to safely bring batteries to full state of charge
• Built-in protection against reverse polarity and short circuits
• Thermal management and intelligent current limiting at high temperatures

Who this is for: Installers, DIY solar enthusiasts and owners of small off-grid systems who need an efficient, rugged MPPT controller for 48V battery banks. Choose this BlueSolar model if you want high conversion efficiency, flexible PV input up to 100V, and the option to add Bluetooth monitoring later. If you require integrated wireless connectivity out of the box, consider Victron’s SmartSolar lineup instead.