Uploaded October 2022 | Updated September 2026, 3 weeks ago

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Part 6 of the "Big Battery Build" of the 6x 280Ah LFP batteries that will power my boat!

In this video, I made a couple of mistakes, one of which toasted a buck converter. With the kind help of my friend, I was able to understand my mistake. I spend some time making sure nothing else is damaged.

This was supposed to be the happy finally, but so goes projects. Only matters that we get back up and keep going, eh?

Note: I know about calibrating the voltage on the BMS now. However, I still think it's bad that it's needed.

0:00 - Connecting the new bank
4:45 - Sparks! Should have been an early clue...
5:20 - Moving the SmartShunt
7:39 - A Comment From My Teacher
8:28 - BMS Voltage Readings Accuracy
11:23 - Powering From The New Bank. Um...
12:10 - Bang!
12:39 - Finding the Short Circuit
14:38 - Calling for Help! Diagnosing the Problem...
19:05 - Use All Your Senses
20:01 - The Downs of a Big Project
20:24 - Understanding my Mistake, Learning Lessons
22:55 - Understanding Induction and Voltage Swings
25:26 - Take-away Lessons
26:37 - Repairing My Mistake
27:30 - Importance of Pre-charge Resistor
28:36 - Reviving the Quattro
30:39 - The Quattro Lives! Adding Pieces Back
33:01 - Smart Shunt, More Sparks!
34:14 - Working Tired...