Lithium: Tear it down, bolt it back

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Batteries get locked up

In this installment of the lithium build I will install threaded rod. Use the sawzall. Get a little, er, nutty. All to bolt the lithium batteries back together.

Fancy high tech threaded rod assembly routine.
Fancy high tech threaded rod assembly routine.

What to do? When you take the packs apart they expand. The top cap holds the top of the battery together, but the bottom spreads.

Gotta get threading

M10 threaded rod to the rescue. I use my drill to thread a nut about a foot down the rod. Cut the rod off with the sawzall. Add another nut. Tighten. Repeat. Takes about 5 hours to put together all the packs. 9 batteries total.

Assembled packs.
Assembled packs.

And after all that I throw two batteries (4.25 kw) up on the charge table. Hook up the solar. And run another charge test.

Charge test #2
Second and third charge tests.
Second and third charge tests.
See Day -2

Note that the alogorythmic nature of the solar controller has shifted my “charge” voltage of 48.26 to 48.33. Resulting in a charge voltage of 48.26 after the charge sequence goes from absorption to float. Neat.

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