The Ag105 is a solar charge controller for protected Lithium-ion (Li-ion) and Lithium Polymer (Li-Po) batteries that can also be used with a fixed DC supply in standalone applications. The module requires very few supporting components to configure the charge controller to any application.
With a wide operating input range of 11VDC to 36VDC and using intelligent charging techniques, such as Maximum Power Point Tracking (MPPT), the Ag105 will adjust the charge rate to optimise the power produced by a solar panel.
The Ag105 can be configured for 1, 2 or 3 series cell Li-ion batteries, with 4 voltage per-cell options to balance serviceable battery lifetime and usable capacity.

Key Features & Documents

Solar panel or fixed DC source charge controller for Lithium-ion battery packs

Maximum Power Point Tracking (MPPT)

JEITA compliant Lithium-ion battery charger

Wide input supply range 11V - 36V

Adjustable charge voltage and current

Fully integrated module, minimal external components

I2C interface

High Efficiency

Overload, short-circuit, and thermal protection


Part Number




Volume Pricing


Miniature Lithium-ion Charge
Controller with Solar MPPT


Evaluation Boards

Ag105 Evaluation Board

This evaluation board is designed to work with the Ag105 Miniature Lithium-ion Charge Controller, Lithium-ion battery pack. This evaluation board is designed to work with the Ag105 Miniature Lithium-ion Charge Controller (supplied fitted) and Lithium-ion battery pack. EVALAg105 can be powered by a bench power supply with a range of 11V to 36V or a Solar Panel. Please use the links provided to buy boards or download the User Manual.

NOTE : Evaluation Boards are supplied pre-loaded with a sample module. Please ensure that you specify which variant you wish populated into the Eval board on request or ideally on your PO.

Download Manual

Buy Evaluation Board