On Tue, 22 Nov 2005 12:29:37 -0000, "Highland Ham"
wrote:


I have about 25 UPS' I picked up at a local university sale for $30 total.
The
largest was a 2KW unit with 18 12V batteries, one of which was dead :-).
Metalworking content - after replacing the one bad battery I tested it
using my bandsaw....
- Bob Headrick
==========================
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 ?

Frank GMØCSZ / KN6WH

Most likely six strings of 3, for a 36 volt system, or 3 strings of 6
for 72. a 2KW 110 volt system on 12 volts would draw close to 200
volts, on 24 close to 100, on 36 close to 60, and on 72 less tan 30
amps for 18 amps out and85% +/- efficiency.