What is the marine cranking rating? The marine cranking ampere (MCA) rating refers to the number of amperes a battery can support for 30 seconds at a temperature of 32Â°F until the battery voltage drops to 1.20 volts per cell, or 7.20 volts for a 12V battery. Thus, a 12V battery that carries a MCA rating of 600 CCA tells us that the battery will
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Report Abuse. Yes you can install windows. Conversion vans are basically windowless cargo vans that have had windows and other dress up items installed. Don't know what it would cost. Even rear windows may not show what is behind you down low (unless you add a fresnel lens to see wide angle).Otherwise you might consider a back up camera.onversion vans are basically windowless cargo vans that have had windows and other dress up items installed. Don't know what it would cost. Even rear windows may not show what is behind you down low (unless you add a fresnel lens to see wide angle). Otherwise you might consider a back up camera.