Quote:
Originally Posted by aybabtme
With 48V propulsion banks becoming more common, and with the assumption that the 48V bank would come with a 12V circuit for legacy loads, and that the 48V bank is much larger and thus receives the charge of all power sources... where are the 48V to 12V battery-to-battery chargers?
Here's the layout I have in mind:
- a large 48V LFP propulsion battery
- solar/mppt charger
- hydrogen charger
- inverter/charger
- directly powers compatible 48V high DC loads (not many yet)
- a small 12V starter battery (to power high amp loads like windlass)
- kept charged up from 48V bank
- runs lights, LEDs (small load)
- runs electronics (small load)
- runs windlass, winches (high load, requires starter battery)
Similarly, if I have a large propulsion bank on my boat and a smaller one for the electric outboard on my dinghy. Need a 48V to 48V battery charger. Where are they?
It seems like the big manufacturers all have a 48V blind spot.
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When I had my 48v boat I used
cheap DC/DC converters, easily replaced. I also had a
bilge pump tapped into the bank at 12V, At first I used a separate 12V battery but later I got rid of it and ran everything off the propulsion bank and DC/DC converters as needed. Be sure to properly fuse everything! Also the
cheap DC/DC converters on fleabay should be downrated about 50%. Don't ask me how I know. So get one rated for twice the
current you think you will draw for that circuit. You can connect several converters to your 48V to separately power more than one 12v circuit. Since they are cheap, keep a couple of spares.
As EP gets more popular, 48V systems will be in enough demand that manufacturers will take an interest. As it is, 48V
equipment is a pretty small niche market. Look to golf cart stuff for a lot of
gear, especially
lighting.