All posts by creeky

Creeky is a wonderful guy who enjoys the outdoors, living off grid, building tiny green homes. He also likes beer. He is often found drawing cartoons, dancing naked in the rain, and pondering the existence of consciousness in the human race. He truly appreciates the support of his readers. Esp. when they buy him beer. Hint hint. Oh. And, yes, he is shameless.

Cell log confabulation

I remember research right?

I’ve done a lot of research on this lithium topic. A lot. And after awhile, well, some of it starts to blur together.

Pretty much as expected. The battery is at 3.83. Now with the cell log we can see thousandth of a volt variations in cells.
Pretty much as expected. The battery is at 3.83. Now with the cell log we can see thousandth of a volt variations in cells.

I saw a guy putting a cell log 8 into his Chevy Volt battery plug and getting live results from his battery. Voltage checks down to the .00X of a volt. How cool is that?

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Canada Day Celebrations

Canada Day is officially Christmas Day for me

Woke up at 5. Yup. 5 hrs of sleep and I’m getting dressed and running out through the cold morning dew to the solar shed. Time to check the first night of lithium battery goodness.

47.6. That’s the voltage of my battery pack after running over night.

A picture of concentration as I begin wiring up the batteries.
A picture of concentration as I begin wiring up the batteries.

You would think I got enough of all this last night. But nope.

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Battery charge/discharge testing

Will flames erupt?

Testing of the charge / discharge performance begins.

Ammeter install complete. Time to monitor some discharge loads. Movie night it is.
Ammeter install complete. Time to monitor some discharge loads. Movie night it is. Note that the idle current of 11.9 w is a combined inverter and TV “off” load. The inverter is measuring at over 10 w idle.
  • Added: Victron 48-1200 inverter. Would have preferred a slightly larger/parallel design. But this will suit for a year or two.
  • Cheap chinese ammeter/voltmeter.
  • Hooked up the TV for a load. And watched a movie. Perfect testing conditions.

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Lithium: Tear it down, bolt it back

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.

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