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BFL13's avatar
BFL13
Explorer II
Sep 23, 2019

AGM Mystery Capacity Crash Below 75% SOC UPDATE

Update 28 Sep. I had an issue with one of my AGMs last Spring where it seemed to act well until all of a sudden it crashed under load when below 75% approx. Now they are all doing it. https://w...
pianotuna's avatar
pianotuna
Nomad III
Sep 24, 2019
Hi BFl13

Under heavy loads six volts exhibit greater voltage sag than a similar number of amp-hour 12 volt jar. Part of that is the doubling of the cell count, and part of it is the thicker plates.

But Mex has explained it--the grid heats, so internal resistance is going up.


BFL13 wrote:
pianotuna wrote:
BFL13,

I wonder if the thicker positive plates are causing the same sort of effect that happens on six volt jars?


You lost me there PT! Please explain what you mean.

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