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Question Could I be charging too slowly?

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(@powerup)
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12kPV + two 14.3 Indoor WallMount 280AH

I am cycling the batteries once a day 100->20->100.

The Technical Specifications page for those WM Batteries says to charge them between 60 - 140A "Charging Current"

https://eg4electronics.com/wp-content/uploads/2024/04/EG4%C2%AE-Indoor-280Ah-Battery-Specifications-Sheet.pdf

Can someone please guide me why going below 60A would be detrimental?

I have been charging them over 6h:45min at a rate of 4kWh [C/.14]

To maintain that rate the inverter has been delivering between 73A - 74A but since that is for two Wallmount batteries the effective rate is only ~37A to each battery.

I am concerned that I may be doing something incorrectly since the spec sheet specifically outlines 60 - 140A Charging Current for those WallMount batteries.

I am discharging the batteries over 3 hours @ ~156A. Effectively 78A to each battery and inside the 60 - 140A recommendation for Discharge Current Rate.

Appreciate your insights and guidance,

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