MEXICOWANDERER wrote:
jrnymn7
A battery bank cannot be analyzed as a whole. Each component (battery) has to be qualified (individually) One low gravity cell can drag 12 other cells down a tenth of volt or more, static resting voltage.
You must test potential across each battery and note units with low(er) potential. Run a hydrometer dip on that battery. Identify which cells have low(er) gravity. Concentrate your equalization on that battery. When the specific gravity reaches original density, proceed to the next "most reluctant" battery. When the cell gravity is in agreement as a total, then establish your at rest voltage, after electrolyte temperature has returned to room temperature. But you have got to record individual battery voltages at rest.
Dealing with partial data means 100% error.
Hope This helps
This is exactly what I've been thinking, and planning on doing as soon as the 1620 arrives. Thank you for confirming I'm on the right track!
In fact, I have been taking voltage readings across each individual batt, and indeed, each one holds and accepts varying voltages, during and after charging. Occasionally the better of the two pairs will line up with each other, but there is always about a .03 difference between the two lesser batts, during and after charge. The nice thing about having the two banks, now, is the ability to work on one set while keeping the other in service.
thanks for all your help!
