Need support for LT8490 MPPT charger

Hi Sir/Madam,

We are Used LT8490 MPPT charger for one of our project.

Our idea is to charge two 12V/100Ah SLA batteries from two 40w solar panels

connected in parallel (OCV = 27V)

We have added load switch between charger and batteries.So that in long

cloudy days we can charge only selected battery.

Secondly in case any one of the battery becom faulty during the service

period disconnect from charger through micro controller

who moniter battery health though gauge IC (LTC2943)

Load sharing switch (LTC4416) used to discharge power from healthiest


incase both SLA battery levels fall below 11V load will be supply thorough

Backup supply Li-Ion Battery.

Kindly tell me this schematic which I have attached will work as per above

listed requirement or not ?

Thanks & Regards


  • Hi,

               We are Using LT8490 MPPT charger.

    We are facing one problem,

    we are powering the charger IC Through DC Regulated power supply (VINR pin pulled low) Battery is charging and status LED shows the corresponding charging stage

    If the DC supply switched off  at that time also status LED blinking 

    I have measured the below voltage when DC supply switched off 

    Voltage in Vin Pin shows 6.3V

    AVDD Pin shoes 3.3V

    Can you give me some solution ?

  • Sorry, there is not enough information.