Hi all,
Just curious on different opinions how to charge a 12V LFP battery from a 48V LFP pack or whenever on shore power. I've seen some other treads but these were all dated.
User case:
I recently converted my boat from fossil fuel to a fully electric 48V 10kW motor (WaterWorld, quite nice product, not sponsored), 16S 304ah EVE LFP cells in an Apexium battery box connected with CANBUS to the Cerbo GX with Touch 50 & a MultiPlus-II 48/5000/70.
For the newly installed bowthruster and the household 12V system (fridge, LED lights etc.) I'm using EVE 304ah cells in 4S config with a BMS & a SmartShunt connected to the Cerbo but still looking for ways of charging this 12V system.
Option 1: using a Orion DC/DC 48/12 set at a constant voltage to a range of 40 / 70% (13- 13.4V)
Option 2: using a Blue Smart charger
Any more suggestions are very welcome.
Right now I'm thinking about using option 1 and using Node-Red to set parameters whenever shore power is connected to automatically start the Orion DCDC to charge the 12V bank and when the voltage drops below a certain parameter during sailing to charge from the 48V bank.
Curious to different opions.
Tom
