Solar Lithium Charge Controller Module, 3S or 4S

Build charging control into a compatible small solar project. This module suits experienced electronics users matching a 3S ternary-lithium or 4S lithium-iron-phosphate battery setup to the correct board.

• ✅ Match the battery arrangement — Separate 3S and 4S versions provide different charging thresholds.
• ✅ Check charging status — Multicolour LEDs indicate input, charging, full and abnormal states.
• ✅ Integrate a small solar system — The board accepts a compatible panel within the stated limits.
• ✅ Reduce reverse flow — The described anti-backflow circuit limits discharge towards the panel.

Choose the Correct Chemistry and Board Version

The stated settings describe 12.6 V cut-off for ternary lithium and 14.4 V for lithium iron phosphate. Confirm the exact 3S/4S version, cell specifications and load requirements before wiring.

This is a bare electronic module requiring DIY soldering and wiring, not a finished charger. Input and output limits differ, and it does not replace the battery pack's appropriate management and protective system.

Technical details

• Options: 3S or 4S
• Chemistry references: ternary lithium or lithium iron phosphate
• Compatible PV specification: 12–24 V, up to 120 W
• Maximum input current: 12 A
• Maximum output current: 6 A
• Charge cut-off references: 12.6 ± 0.1 V or 14.4 ± 0.1 V
• Indicators: multicolour status LEDs
• Package: 1 controller module
• Battery, panel and finished enclosure: not included

Match the board to your battery chemistry and planned solar circuit before building.

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