Moderated Discussion Areas
ContinuousWave: Whaler Performance
|Author||Topic: Boat batteries|
posted 03-10-2003 09:09 AM ET (US)
They classify batteries in CCA "cold cranking amps" for cars and MCA for "marine cranking amps.
My motor calls for 630 MCA or 490 CCA.
Whats the difference?
posted 03-10-2003 11:14 AM ET (US)
CCA = cold cranking amps. Maximum number of amps a battery can supply for 30 seconds at a temperature of 0 degrees F, before dropping to 7.2 volts.
MCA = marine cranking amps. This is similar but is measured at 32 degrees.
Because the CCA test is performed at a lower temperature, it is a more severe test than the MCA test and as a result will have lower numbers.
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