House batteries not up to ah rating

DougHere wrote:
f you go to Interstates website, you can see the AH capacity depends on the draw.

At 5 Amp draw it is rated 16.4 hours = 82 AH capacity
At 25 Amp draw it is rated 2.3 hours = 57.5 AH capacity

Amp Hour ratings used to usually be the 20 hour rating. BUT now you need to do a lot of reading to see what you are getting, lots of companies are advertising readings on different draws.

I have a pair of no-name 6V GC batteries, rated 300 AH, nowhere can I find at what hour rate that is (I suspect its the 100 hour rating). In real life, I'm sure they are really about 220 AH at the 20 rating.

Then my quick discharging at over the 5 amps could be the cause of the lower capacity? I did turn on more lights at one point and got the amp draw going at 12 amps for a while.
I should run another test then using 5 amp or less draw down and see if it makes a difference. My battery monitor showed the amps at 8.9amps being drawn out when the furnace came on for 20 minutes per hour.

RJsfishin wrote:
Quote:
My Intelli-power converter charger is supposed to keep the batteries "desolated"
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Desolated = to unleash physical destruction on....(out of spelling ace)
No wonder you short on amp R's !

Thanks, I guess the spell check changed it as I was writing. Corrected.