Practical Lithium battery usage advice

[Lightwave395]

My new 300ah battery is on it's way and I'll be off to the boat in a few weeks to remove 300ah of Gel battery. My original plan has been modified and I'm planning on including an Orion Dc-Dc charger now.with a 60a alternator.
I'm sure I've read in several places not to have Lithium on 'float' charge so if I have a long passage motoring in flat calm should I turn off the Orion when the Lithium shows as fully charged ?

 

[simonfraser]

Your 300Ah lithium does not have a BMS ?

 

[Lightwave395]

Your 300Ah lithium does not have a BMS ?

Yes it does, I wasn't sure if that would take care of that specific issue

 

[PaulRainbow]

Your 300Ah lithium does not have a BMS ?

How is that relevant ?

 

[PaulRainbow]

My new 300ah battery is on it's way and I'll be off to the boat in a few weeks to remove 300ah of Gel battery. My original plan has been modified and I'm planning on including an Orion Dc-Dc charger now.with a 60a alternator.
I'm sure I've read in several places not to have Lithium on 'float' charge so if I have a long passage motoring in flat calm should I turn off the Orion when the Lithium shows as fully charged

Nothing wrong with having an appropriate float setting. Without one the DC-DC charger will complete it's Bulk and Absorption phases and then stop charging, so on the "long motoring passage" you charge the battery then spend the rest of the voyage taking charge from it. If you set the Orion float setting to 13.4V it will maintain the battery at about 90% SOC or 13.5V for about 95% SOC.

 

[NBs]

I use a charging setting of 14.2V for 10 minutes and a float charge of 13.5V when I'm driving long distances. My current consumption is about 15–20A when I'm on the move, and this has been working well so far.

 

[Sea Change]

All you need to worry about is letting the battery spend long periods of time at 100%.

As I understand it, the quandary is how to ensure that the battery gets *some* time at 100%, so that the balancer can do its thing, whilst not spending longer than necessary at that voltage.

Paul's suggestions for settings should achieve that.