From the BB site on the OP's question
"Jerry Johnson | Jan 9, 2020 at 6:40 am
I have a Progressive Dynamics 4575 power station in my RV and upgraded it to the lithium 4575 for my four battle born 100ah batteries. The charger produces a constant 14.6 volts. I am a full timer on shore power 24/7 and boondock just a few times a year. Is a constant (A few months) 14.6 ok for the batteries?
Should I downgrade to the original non-lithium charger that is 14.4 bulk and 13.6 float?
?
Hi Jerry,
If you are cycling power in and out of the batteries when plugged into shore power with your 14.6 volt converter, it is completely acceptable and will not cause any issues. If you are plugged into shore power when NOT cycling power in and out of the batteries(such as in a storage scenario) for more than 3 weeks at a time, then we recommend disconnecting the converter.
Thank you,"
That is the only answer where they say to shut the Li PD down after a time on float. Most other answers say they like the PD Li for their BBs.
Here they like the fixed voltage PowerMax LK/Boondocker too, but no mention of turning it off
"Hi Julie,
The Boondocker works great with our batteries. You will want to switch it to fixed output mode and adjust the dial to 14.4 volts.
Thank you,"
Here they say it is ok to float the BB at 13.x, but that you don't need to float it at all for a year"
"Hi Phil,
The Storage mode for the PD9245 will not harm your battle born batteries and is safe to leave plugged in. The Iota 14.7 volt lithium dongle is over the internal bms voltage set point and will shut down our batteries if it is reached.
Keep in mind that you do not need to have a maintenance/trickle charger for our batteries when they are in storage. If you bring your battle born batteries to a full charge and disconnect them from any power coming in or going out, they can hold a charge for up to a year without causing any kind of damage or concern.
Thanks,"