Solar MPPT Charging Controller Module CN3791 A compact, efficient controller designed to maximize small solar panel charging performance while remaining lightweight and rugged for outdoor use. Ideal for camping, hiking, and other offgrid activities where reliable, efficient battery charging matters. Key benefits Efficient MPPT power tracking for higher energy harvest from solar panels and improved charging performance. Fast, stable charging using frequency MOSFETs, current diode, and power flat inductance for effective current delivery. Longterm current stability thanks to an oversize aluminum heatsink that dissipates heat during extended use. Simple visual status indicators make it easy to monitor battery and charging status at a glance. Compact and lightweight for easy integration into portable solar setups and DIY projects. What it does and why you need it Manages charging with MPPT maximum power point tracking and provides trickle, constant current, and constant voltage charging stages to protect batteries and improve charge efficiency. Uses quality internal components and alloy current detection to handle up to 3A charging current reliably. Keeps operating temperatures lower under sustained load so small solar arrays can reliably up batteries during multiday outdoor use. Status indicators Red light indicates no battery and green light flashing in that condition. During charging the red light is bright. Charging stops automatically when the battery is full and the green light is steady. Main features MPPT solar maximum power tracking charging management chip with trickle, constant current, and constant pressure charging. Imported frequency lowloss double MOSFET, current diode, and power flat inductance. Alloy current detection for accurate current monitoring. Oversize aluminum heatsink for longterm current stability. speed and efficient charging mode. Visual status indicators for no battery, charging, and full conditions. Specifications Model: CN3791 Charging current: 3A Wiring mode: Welding Weight: Approx. 12g / 0.4oz Size: Approx. 31 x 49 mm Package contents 1 Solar Panel Controller Charging Module Note and old product versions may be sent at random. only if you do not mind receiving either version.