MPPT Solar Charge Controller (40A / 100A, 10-100A Series)

The GS-MPPT40A brings maximum power point tracking to small and medium off-grid systems, extracting up to 30% more energy from a PV array than PWM controllers. With 99% tracking efficiency and 98% peak conversion efficiency, more of every sun-hour reaches the battery.

Key Features

• True MPPT: 99% tracking efficiency and 98% peak conversion efficiency.
• Automatic voltage detection: 12/24/48V battery systems (up to 384V on large models in the series).
• Battery chemistry support: selectable profiles for lead-acid (flooded, AGM), gel and lithium batteries.
• Four-stage charging: bulk, boost, float and equalize stages extend battery service life.
• Informative display: backlit LCD shows PV voltage/current, state of charge, load status and accumulated energy.
• Protected and connected: over-charge, over-discharge, overload, short-circuit and reverse-polarity protection, plus RS485 for remote monitoring.
• Scales to 100A: high-current models pair 96-384VDC battery buses with oversized, fan-assisted heatsinks to hold 98% efficiency at full load.

Typical Applications

Small and medium off-grid homes, solar street lights and telecom sites running 12-48V battery banks; 100A high-current models with 96-384VDC battery buses serve large arrays, commercial and industrial plants and village power systems.

Common Pain Points We Solve

• Wasted sunshine: true MPPT recovers up to 30% more energy than PWM controllers, especially mornings, evenings and cloudy days.
• Premature battery failure: four-stage charging with chemistry-specific profiles (lead-acid, gel, lithium) doubles battery service life.
• System voltage confusion: automatic 12/24/48V detection fits existing battery banks without reconfiguration.
• Blind unattended sites: RS485 communication enables remote monitoring for street-light and telecom installations.

Specifications