The Victron BlueSolar MPPT 100/15 is a solar charge controller built for small to medium off-grid systems. It handles a maximum PV open-circuit voltage of 100V and delivers up to 15A of charge current, working with both 12V and 24V battery banks. It suits installers fitting out caravans, boats, cabins and other small off-grid setups.

Key features

• Input voltage, 100V maximum PV open-circuit voltage.
• Charge current, 15A maximum output.
• Battery compatibility, 12V and 24V systems with automatic voltage detection.
• Tracking, true MPPT algorithm follows the panel's maximum power point as conditions change.
• Battery chemistries, supports gel, AGM, flooded lead-acid and lithium-ion batteries.
• Weight, 0.55kg.

Product overview

The controller tracks the maximum power point of the connected array in real time, which matters when panel temperature or shading shifts the power curve. Because the input can take up to 100V, installers have more flexibility in panel selection without needing a separate combiner or step-down. The 12V or 24V battery bank is detected automatically on first connection, which simplifies commissioning. Charge parameters can be adjusted through the VE.Direct port using VictronConnect software, so settings can be tuned to specific battery types.

A built-in load output allows direct connection of DC loads up to the controller's rated current, with street lighting and timer modes available. This can remove the need for a separate load controller in simpler off-grid setups. Bluetooth monitoring is available with the optional VE.Direct Bluetooth Smart dongle, and the VE.Direct port also supports wired monitoring and configuration.

Applications

• Caravans and motorhomes with 12V or 24V leisure battery systems.
• Narrowboats and sailing vessels needing compact solar charge management.
• Off-grid cabins and garden buildings with small solar arrays.
• Remote monitoring stations and telecommunications equipment with DC power needs.
• Small agricultural or rural sites without a grid connection.

What's in the box

• Victron BlueSolar MPPT 100/15 charge controller (retail pack).

Installation notes

Fitting should be done by someone experienced with 12V or 24V DC solar systems. The PV array's open-circuit voltage must not exceed 100V under any condition, including cold weather, which can push Voc above the STC-rated figure. Correct fusing between battery and controller is required. For lithium batteries, check that the BMS is compatible with the charge profile settings on this controller. VictronConnect software, accessed via the VE.Direct interface or the optional Bluetooth dongle, is recommended for commissioning.