Re: Opinion on these batteries’ voltage?
Attached is a State of Charge Chart for your reference. In order to get a accurate representation of the state of charge, you need to wait 12 to 24 hours for the voltage to stabilize after charging to measure an accurate voltage.
As Volt_Ampere states, since your batteries are getting old, it may be more representative to measure the voltage of the pack and also of each battery when it is under load (driving the cart up a hill provides a good load).
As the State of Charge Chart note on the bottom, a fully charged 48 volt pack should not drop below 42 volts when under load.
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