Good point bob,

my liebert unit is full sine wave, from a supermarket
pos system, just replaced all three 12v batteries
with new ones, they are in series, 36 vdc.

My work ups, exide 12kva unit used 60 batteries,
three phased in series 240vdc

dude.

Bob Headrick wrote:

"Highland Ham" wrote in message
...

Bob , Interesting info ; can you confirm that the 18 pcs 12V battery were
in fact 9 strings of 2 batts in series (each string having a fuse )
providing 24 V ? or were all the 18 batts in parallel ?

Actually they were all in series, making it a bit nerve-wracking to replace a
battery in the string.

- Bob W7OV