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landyacht318's avatar
landyacht318
Explorer
May 29, 2016

Some battery temperature data during high amp recharge

Northstar group27 AGM battery. 90Ah capacity. 5:58AM 53Ah from full, 12.1v under 0.8 amp load 62.2f battery, 61.3f Ambient Apply Meanwell's 40 amps set to 14.9v( accounting for voltage drop on...
landyacht318's avatar
landyacht318
Explorer
May 31, 2016
Another high amp recharge happening now from 50%, ~48AH from full.

This time the voltage did not rise fairly quickly to 14.5, then drop to 14.0, then take ~25 more minutes to rise back upto 14.5v at a steady 38 amps.

Right now the monitor is saying 9Ah have been returned, battery voltage 14.0 and accepting 38.4 amps.

Started at 64.2f, now upto 70.1f

I am curious as to why the initial voltage yoyo occurs some times, and not others.

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