Well if we take my test at face value- around 11 amps draw for 20 minutes, the AH rating comes out to about 3.7.
Figuring in the degraded performance at the test temp of 8C vs. the usual rating temp of 25C and the fact that the battery would last relatively longer pulling out about half the current, these batteries might just deliver 6 amps for one hour at 25C.
As far as backup power for my EFI system current draw, I won't count on this one to last much more than 15 minutes and the identical primary battery about the same.
I want to be on the ground in less than 30 minutes after alternator failure if I shed all other electrical loads.
Figuring in the degraded performance at the test temp of 8C vs. the usual rating temp of 25C and the fact that the battery would last relatively longer pulling out about half the current, these batteries might just deliver 6 amps for one hour at 25C.
As far as backup power for my EFI system current draw, I won't count on this one to last much more than 15 minutes and the identical primary battery about the same.
I want to be on the ground in less than 30 minutes after alternator failure if I shed all other electrical loads.
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