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BQ34Z110: Battery gauge for 12V Lead Acid Battery pack

Part Number: BQ34Z110
Other Parts Discussed in Thread: BQ34Z100

Hi everyone. 

I am developing a 12V Lead-Acid battery solar charger. The charger is autonomous but it is monitored/controlled by the MSP4302553. I am measuring battery voltage and input/output current with the MSP4302553 however implementing accurately the SOC and SOH calculation is quite complicated. As  possible alternative and also to compare my own SOC calculation I am looking for a battery fuel for Lead acid batteries. 

One option I found is adding the BQ34Z1110 and communicate the SOC/SOH to the MSP4302553 by I2C, however I can see that it is not recommend by new designs, also the EVM is difficult to find. 

Any possible alternative?

Best regards