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Blue Solar pwm 30 amp dropping pv charge

I'm have a 30 amp 12 v pwm blue solar charge controller that is new. Will be charging well. Come back an hour later and less than half charge. Reconfigure from lifepo4 to gel and immediately recovers for an hour or two the drops again. Reconfigure back or any battery alternative and full amperage recovered. Im using 2x 160 w 36 cell panels in parallel with 120 lifepo4 battery with 40 amp bms. System works fine with cheap pwm from china not designed for lifepo4. Its as if system goes into absorption mode even on lifepo4 after a few hours

Any advice please

BlueSolar PWM
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