Hi Ranga, and if I get the time, I will try to work out the exact amount of SoC your battery is at, when at 11.98v with a 1a load.
But can I suggest you recharge your battery and leave it on float an additional 12 hours and then retry the test with a 6 amp load.
A 6 amp load would be very close to a standard C20 test, the normal capacity test used to determine the SoC of a battery.
Your 1 amp load would actually be like a C150 test which is just not accurate enough to determine the true condition of your battery.
NOTE, at 63 amperes for a 50% discharge of the battery, while not bad, it does seem a bit short of the optimum.
Again, it is not a bad result.
If you would like more detailed info on simple load testing of your battery, ask away.
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