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What is the Reserve Capacity rating (RC)?

April 26, 2017rating RC Reserve

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10 Posted

What is the Reserve Capacity rating (RC)?

1 Answer

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10 Posted

The reserve capacity of a battery is defined as the number of minutes that it can support a 25 ampere load at 80°F until its terminal voltage drops to 1.75 volts per cell or 10.50 volts for a 12V battery. Thus a 12V battery that has a reserve capacity rating of 100 signifies that it can be discharged at 25 amps for 100 minutes at 80°F before its voltage drops to 10.75 volts.