ZimInSeattle said:
... the 3 higher modules began to bypass at 4.10 volts and they started to get pretty hot. ....
Do you mean the leafmons are getting hot? If so - that's to be expected. They can reach 65C (149F).
You can control how hot they get in a few ways....
1) You can set the Bypass Temp Limit and/or Bypass Current Limit on the Hardware -> Cellmon page (lower left corner). I restrict mine to 1a and 55C - mainly to extend their life. Others on this forum have their own ideas on this and may chime in.
2) and/or use fans to keep them cool if your setup would allow this. I use WM4 + Expansion and it has 'fan' control - to turn fans on/off based on temp to keep the batteries (and mons) cool. I don't use it - but its a nifty advanced feature.
You should set things up so you're not worried about running balancing... and of course be aware that they will get hot - its what they do as they burn excess power off from a cell
FYI - Here's a auto-level balance youtube using Batrium by @Daromer -
Auto-level is different than bypass in that you can run it all day as you use the system- doesn't depend on the cells being 'at the top'. This is what I use mostly when I want to do a touch-up so the system can continue to operate.
FYI #2- here's the PDF on mons from Batrium website-
https://s3.amazonaws.com/helpscout..../BMon-and-LMon-LeafMon-Data-Sheet-Ver-2.0.pdf
On page 5 - Operations section - its says the that mons will auto-shutdown if temp exceeds 75C (so they can get to 70s.. which is quite hot!). I read somewhere else that for long life, the temp should stay more in the 50'ish C range as a max - which is why I have mine set to 55C -but can't find it right now.