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  • After the top balance....

    Finally finished up top charging and then top balancing 8 280AH cells from the 18650 Battery Store. Top balanced to 3.65V and took them off of the charger last night. I was surprised to see them at 3.605 this morning. I would have expected them to drop more? They are still in 8P. It's going to...
  • T Class Fuse heat?

    How much heat gain should I expect to see on a Littelfuse 225A T Class Fuse and a cable? Drawing almost 180A at 12.95V. I'm seeing around 150F on the fuse and 120F on the cable going from the fuse to the shut off. About 70F ambient. Fuse nuts torqued to spec 191 inch lbs, 2/0 cable crimped with...
  • Too much compression? Attempted crushing...

    I'm curious - has anyone literally tried to crush a 280Ah pack with compression? I've seen many threads debating compression and threads on how to dial it in to an exacting pressure. But has anyone just gone to an extreme in compression? Not exactly to the hydraulic press channel extreme though ?
  • More than 20kwh of LFP and being code compliant?

    It seems anything over 20kwh of lithium storage makes things complicated.... Planning out a grid tied zero export system....has anyone looked at this code? 1206.2 https://codes.iccsafe.org/content/IFC2018P6/chapter-12-energy-systems
  • Large delta at the end of the charge....200mv.

    I am trying to figure out why Cell 4 is falling so far behind at the very end of charging. Deltas under 8mv until the very last Ahs to go then it ends up at 200mv at absorb which is set to 14.00. If I discharge after the charge the deltas come down below 10mv quickly. Two 280AH packs 4S. Cells...
  • Heltec 5A Balancer - remote trigger?

    I wanted to trigger my balancers to work via a programable relay on my Victron battery monitor. I know if you desolder the "Run" bridge on the Heltec you can put a switch there. It seem like the relay of the BMV can supply a NO or NC signal which is 12V. Will that work with the Heltec? Would I...
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