Out of charge

Discussion about OutBack Inverters in Grid Tie Applications

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Re: Out of charge

Post by raysun »

dleduc wrote: Wed Sep 06, 2023 10:00 am Is there any disadvantage to leaving it at 3.5 hours? I did turn off grid charging so the batteries are getting everything that they can from the sun.
In the current scenario: lightly discharged battery, and suspect health, the long Absorb Time may overcharge the healthier cells; and if there are shorted/sulfated cells, cause heat buildup in those blocks.
Normally using Automatic Charge Termination Control would control the absorb time dynamically, however it may not work as expected with degraded cells.
Since the battery, as exists currently, is staying in service, a shorter Absorb Time will reduce the stress on the battery overall.
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