Solar charge controller Victron SmartSolar MPPT 100/20 48V 20A

The Victron SmartSolar MPPT 100/20 48V 20A is a maximum power point tracking solar charge controller designed for 48V battery systems and small off-grid photovoltaic arrays. It continuously adjusts the PV operating point to extract the highest possible power from solar panels, improving charging efficiency compared with conventional controllers. The device supports controlled charging of lead‑acid and lithium batteries and includes built‑in protections to prevent overcharge, reverse current and overheating.

Advantages

The SmartSolar MPPT 100/20 delivers higher energy harvest through MPPT algorithm, especially under changing irradiance and partial shading conditions. Its compact design and integrated monitoring interface enable straightforward installation and system oversight. The controller provides stable charge regulation for 48V battery banks and includes multiple safety functions such as temperature compensation, short‑circuit protection and automatic load disconnect to protect batteries and panels.

Suitable for

• Small off‑grid solar systems with 48V battery banks
• Battery charging for cabins, boats and remote equipment
• PV arrays where MPPT optimisation improves energy yield
• Systems requiring reliable charge regulation and basic protection features

Key specifications

• Maximum PV open circuit voltage suitable for 48V systems
• Maximum charging current: 20 A
• MPPT technology for improved conversion efficiency
• Compatible with lead‑acid and lithium battery chemistries
• Temperature compensation and overtemperature protection
• Reverse polarity and reverse current prevention
• Integrated communication interface for monitoring and configuration

How to use

Install the controller close to the battery bank and mount it in a dry, ventilated location with sufficient clearance for heat dissipation. Connect the battery first, then the PV array following the manufacturer’s recommended wiring and safety practices. Configure the charge parameters for the specific battery type and voltage using the built‑in interface or the compatible monitoring app. Verify system operation by checking battery voltage, charge current and status indicators after initial connection.

Recommendations

For optimal performance, size the PV array and wiring to match the controller’s input limits and use appropriate fusing and circuit protection. Ensure the controller firmware and any companion app are up to date, and apply temperature compensation settings when batteries are exposed to varying ambient temperatures. Periodically inspect cable connections and the mounting area for dust and corrosion to maintain reliable operation.