posted 13 years ago
Don't worry that there is no data for "cold cranking amps". That really only applies to car batteries anyway, which suck for deep cycle use on a homestead with wind or solar.
The 900 number probably refers to amphours. In a perfect world, that would mean you could draw one amp out of the battery bank for 900 hours, or 900 amps for one hour. Realistically, if they are used but in decent shape, maybe you can get 1/2 or 2/3 of that amount. Also, you don't won't to discharge them 100% anyway if you can avoid it, as it shortens the lifespan considerably.
there are ways to test the individual batteries that make up the bank, and test the whole bank.
HTH,
troy