How many corrections can you get to?

[paulca]

I gave up around 30.

https://youtu.be/tAuPfgZgXec

[SiliconWizard]

Uh, if one has 20 min to waste.
Just quickly fast-forwarded.
Is he suggesting to connect a Li-ion battery directly in parallel with a lead-acid battery?

[bdunham7]

Is he suggesting to connect a Li-ion battery directly in parallel with a lead-acid battery?

Not Li-Ion, but LiFePO₄. 

[paulca]

Yes.  He even sells a product to help with that.

He thinks that 14.00 volts is fully charged LA.  He thinks that fully charged LFP is also 14.00V.  He hand waves the cells count and everything else. Deals with commercial bricks.

Fine.

He also thinks that 13.2V is LA float voltage and that 13.2V is also "resting" voltage for an LFP.

It's not just him!  YouTube now recommends these people to me.

I see three not quite fatal flaws.

1.  Their measuring is diabolical.
2.  They don't seem to understand Ohm's law.
3.  They only measure voltages in one place, however, in other tests they quote different "theoretical" voltage figures for cells in parallel.  They never show them measuring those "SoC voltage indicators" on each battery, but they swear they exist... without any understanding of why or what they are actually seeing.

I dont think they get it.... at all.

LA in parallel with an LFP.  Is a lead balloon.  It will go only one way.

[tooki]

I find it hard to take someone seriously who named his boat “Temptress”. 🤣

[paulca]

I've been arguing back and forth with them.

They (they have friends) seem to follow a completely different set of voltages for batteries then the rest of the world, including the manufacturers.

Has anyone seen a LFP ~12V battery which states 13.48V as fully charged?  Has anyone seen one that states 14.0V?

He also quotes this video as evidence of what really happens.


Again.  How many screw ups can you count in the first few minutes and in his setup?

I actually think they are in the belief that because there isn't a massive amount of current, no sparks and no flames that "It must be fine right? Problem solved."

They don't seem to understand that constantly pulling the LFP down defeats the entire purpose of it being Lithuim.

I could do my own tests, but I'm going to figure an LFP in parallel with a LA will perform negligible better than 2 lead acids in parallel.