48volt charging/ powering with 12v

Partlyshady

New Member
Joined
Jun 20, 2022
Messages
23
Location
Dayton Ohio
I'm currently sourcing stuff for a 48volt build . My question is in the case of lead acid batteries, if you jumper off the "12volt point " in a 48 v series of connected batteries can you use that to power 12 volt devices ? Can you use a 12volt alternator to charge ? I'm guessing you would need some sort of isolation relay to charge both halves of the string? I know about 48 volt alternators but 12 v are cheap and plentiful.
 

Don B. Cilly

Energetic energy padawan
Joined
Aug 24, 2021
Messages
1,117
Location
Mallorca ES
Not really.
If you want to power 12V items, you're much better off using a DC-DC converter, they're quite efficient.
Charging, just go 48.
-
 

Don B. Cilly

Energetic energy padawan
Joined
Aug 24, 2021
Messages
1,117
Location
Mallorca ES
No. It's just a bad idea to draw from only some cells in a series connected battery.
Honestly, PWM DC converters are not bad at all.
-
 
Top