My Lithium Battery Pack Project

[T1 Terry]

Nice looking job, the 160Ah cells will handle the 2000w inverter better than the 100Ah cell would have so not really over kill. Recently upgraded a 400Ah system to 640Ah (16 x 160Ah cells) simply because they would fit in the same spot. The 16 x 100Ah cells had never given any problems in their 3 yr service but when we serviced them and capacity tested the Sinopoly cells had lost roughly 20% capacity over those 3 yrs, yet the equivalent Winston cells still produced more than the advertised capacity after 3 yrs constant use, so you are right about making sure you are actually getting good quality cells in the first place. I'm not saying the Sinopoly cells are good, what I'm saying is the Winston cells are better for house battery use.
As far as cell monitoring, for the cost of well under $100 all up it is very cheap insurance, better to be making informed decisions than not actually knowing what is going on and hoping all is well. I know the Winston cell supplier over in WA doesn't believe in cell monitoring, but he also has a 1000Ah cell with a very pregnant looking bulge in the side marked as a sample...... a rather expensive sample that a simple system that monitored cell voltages would have saved the demotion to sample class
Single cells in series are the hardest to keep balanced when using top end charging, multiple cells in parallel and these in series give much less trouble but I still would build a pack without cell monitoring, just too much money at stake. You can't measure the cell voltages in a battery built into a plastic case no matter what chemistry it is, LiFeP04 is one of the more sensitive to over voltage in regards to shortening their life cycle, if you can monitor the cell voltages I don't know of a reason why it wouldn't fitted as a safe guard.

As far as not being needed on a 12v battery.... might pay to ask those who do have them if they have ever been alerted to a cell out of safe voltage range since they have had their system up and running......

T1 Terry

[Mrcoolabah1au]

Wow job for magic box

[Enginenumber]

Heres the panels on the roof

Solar Panels 240w.jpg

6 / 40w panels.
Not quite flat , but got plenty there, can still use roof bars , keeps roof cooler and less noise from the rain.

Regards,
Enginenumber

[Enginenumber]

Yes,
Had to get the battery going quickly as the other agm was done,
so later on, will be able to look into the cell balancing and monitoring , was lots of opinions and views on it all as I researched.
Just went with what I had, info wise at the time.

Got little induction hotplate going now, so no more gas bottles for me hopefully in the car.

Regards,
Enginenumber