Re: Club Car 48V Runaway Charger??
Here is a bit more information on charging voltage, charging profiles and state of charge that you can refer to. The US Battery paper has a pretty good description of three stage, two stage and single stage charging. The C/20 (or C20) rate they refer to is the capacity rating of the battery.
For instance, a common 6 volt battery is the Trojan T105 which has a 225 Amp-Hr at the 20 hr discharge rate (C20 rate).
The Trojan recommended Bulk Charging amperage is 10 to 13% of the C20 rate = 22 to 29 amps charging rate. During the Finish Charge, the charging amperage drops to 1 to 3% of C20 rate = 2 to 7 amps. Note that not all chargers are rates for the 22 - 29 amps that Trojan suggests. In in your case you mentioned drawing 13 amps which might be the maximum that your charger can put out ... and it will take longer to complete the charge cycle compared to using a 22 amp rated charger.
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