Compact 12V MPPT Solar PV Charger Controller Module CN3767 CN3722 Key benefits Optimizes solar charging for small 12V systems: builtin MPPT function maximizes power harvest from an 18V solar panel to charge 12V batteries or 3S battery packs more effectively than a basic regulator. Reliable, lowcurrent charging for small applications: 3A maximum charging current is suited to charging small lead acid or 3S lithium packs and powering lowpower electronics. Simple status feedback: integrated LED indicator shows operating state for quick visual checks without extra tools. Easy to install and integrate: compact plastic housing and straightforward wiring make it suitable for DIY projects and retrofit installations. What it does Converts PV input to appropriate charging current and voltage for 12V battery systems using maximum power point tracking technology. Supports 3S battery configurations and standard 12V battery setups. Accepts solar panel input compatible with an 18V panel system and regulates charging up to 3A. Key specifications and attributes Controller type: MPPT solar PV charger controller module Operating voltage: 12V battery system Maximum charging current: 3A Supported panel input: compatible with 18V solar panels Battery support: 12V systems and 3S battery packs Indicator: LED status indicator for operation monitoring Material and appearance: plastic housing, red color Controller chips or models referenced: CN3767 and CN3722 Form factor: compact and lightweight for small installations Why customers choose this module Fits projects that need a small, efficient charge controller without complex setup. Compact plastic enclosure reduces bulk and simplifies mounting in limited spaces. LED indicator reduces the need for additional meters during setup and basic troubleshooting. Practical applications Portable solar chargers: Combine with a small 18V panel and a 12V battery or 3S pack to create a compact, portable charger for camping lights, small power banks, or field electronics. Remote sensors and monitoring stations: Provide regulated charging for lowpower remote devices where a small, reliable controller is required. DIY small vehicle and hobby projects: Use in hobby boats, small RV compartments, or micro offgrid systems where a 3A charge controller and compact form are appropriate. Installation and use notes Verify battery chemistry and voltage match a 12V or 3S configuration before connecting. Confirm solar panel nominal voltage is compatible with the controller and does not exceed recommended input. Observe correct polarity and secure connections; the module is intended for lowcurrent applications up to 3A. This module provides a straightforward MPPT charging solution for smallscale solar setups requiring 12V or 3S battery charging, LED status indication, and a compact plastic enclosure for easy integration.