3 ms·
Exactly, the PC PSU coverts AC to 12v for the PC anyway, so 12v batteries should slot into that scheme, without a separate PSU and inverter.
by jacknews 3y ago
Exactly, the PC PSU coverts AC to 12v for the PC anyway, so 12v batteries should slot into that scheme, without a separate PSU and inverter.
- consp 3y agoYou would still need a DC to DC converter as lead acids deliver anywhere from 12.8 to about 10v depending on SoC and load.
- windexh8er 3y agoRemember that DC to DC power supplies are much smaller because existing AC PSU has to deal with the transformer aspect. I worked for an ISP that was also a CLEC back in late 90s / early 2000s. All of the telco side was DC (massive 48v battery banks) - so when we were doing server implementation it made sense to get all DC PSU on the servers. Not sure why DC PSU aren't a more universal option as you'd think UPS providers could easily offer DC output models. There are options out there, I ran across this [0] looking for typical ATX DC to DC PSU. [0] https://lazer3d.com/dc-dc-power-supply-guide/ https://lazer3d.com/dc-dc-power-supply-guide/
- icehawk 3y agoFor anything larger than about 500W that'd become untenable because at 12V as you'd need cables that can carry in excess of 50A. UPS systems start connecting the batteries in series to provide higher voltages for this reason
- jacknews 3y agoOr multiple cables, just as PC power supplies of 500w+ have, and in fact some of their power is delivered at 5v.