Glad you got it sorted!  I'm stoked to get them up there   Gotta put them back in the packing for safe travel (and they weight 80lbs ea) so that will be fun, and then I have to LIFT them onto the truck bed and back onto the pallet (at least I have a tractor up there to take them off with).

With luck I'll get everything up to the cabin safely and be able to get something done finally!  WOOT!  

We are planning almost an entire week up there (Sunday to...some day NLT Sunday) depending on how things go and what we get accomplished and if I can get the new pump installed in the water system so my wife is happier with the cabin water pressure (I'm putting in a Sureflow 12v RV pump inline with an expansion tank and a gravel filter).

I also need to blow out or somehow clean out the sink taps as two of them are plugged up.  

Good times!

Makes sense to me, get them up and running and maybe you'll find you want to set something up differently anyway....

I had trouble with theft when I first bought my place, ended up catching the guy who stole my atv trailer and long story short he went to jail for 2 years (lots of priors).....After he got put in jail, and thankfully after he got out, i haven't had an issue since.....

Anyway, good luck....

 

OK I decided to go ahead and hook up the new batteries next week in the same location as the old ones and will have to hope they don't grow legs   Truthfully I've always worried as remote cabins are just, well, remote and crack heads can find them.  But we'll risk it and get them installed.

I still plan to put in the back room which won't technically be more secure but it will be 'out of site, out of mind' so that might help   It will also be warmer year round which will be good but since I'm working a little longer now I don't have the time to get the room ready before the summer hits so we'll go with this and move on.

Here's hoping they work out great!

QuoteI just need to confirm that my voltage between 3 Mules I will be running in parallel should be within 1v of each other?

Is that correct? Bascially one is at 27.5v one is 28v and one is 27.7v

Dylan 11:06 AM

Yes that is correct

I'd decided to double check with tech support on my 3 LiFePo4 batteries. and the above is what I got back.

Also, they have a button to turn them 'on' or 'off' in the front so all three will need to be 'on' whenever in use which for me will be all the time.

I guess we can't go too wrong by following what the seller states.

What they are saying is that it must be within 1v before connecting.  Not sure why it doesn't need to be closer...maybe something to do with getting them balanced after connecting?  

Or maybe he said 1V but meant .1V...hmmm

BOM's    BMS 

I believe that voltage should be more in the neighborhood of 0.1 volt between 12 volt batteries connected in parallel, not 1.0 volt. However, I have read other opinions that 0.2 volts to 0.3 volts difference is okay too.

A small voltage difference between lithium cells and batteries is a greater difference in total charge or energy, than what we are used to with lead-acid.

I've learned that I just need the three batteries to be within 1v of each other which they are now after some charging.  it's clear though, that the BOM's decide when they are full or not and shut off any incoming charge to stop them from overcharging.

Also, for now, I've decided to install them where the old FLA's are for now to get them in use sooner.  Then I can spend the time needed to get the back room ready.

https://up.codes/viewer/new_york/irc-2018/chapter/4/foundations#R404

That floor diaphragm is lateral support. I am actually not sure if it 'resets' the unbalanced fill rule in the above link, but it seems reasonable. I would read section R404 and know it well before talking to the code guy.

Also assuming your attic joists sit at the top of the 10' wall section.