Testing

The system being used to test the heatsink is as follows:
Also plugged into the UPS were an HP PhotoSmart 8150 printer, a Belkin 4 port USB hub, a Creative Labs 5.1 speaker set, and a DSL modem/router. During the testing period the system was put through an array of benchmarking and gaming. During that period, the Sanyo Denki A11H never once gave an over voltage alarm, meaning the system was drawing too much power for the UPS to keep up with. The input voltage read in the software stayed between 115-120V. Output voltage stayed around 120-121V. Under most conditions, the A11H UPS showed the computer drawing only about 43-47% load. The highest I saw the load reach was 75%, but that was only briefly during certain portions of 3DMark06 testing. A nice feature of the A11H UPS was that the load percentage was shown on the front LED panel, since during the 3DMark testing the UPS software was not visible.

Run Time

With the serial cable connected from the A11H to the computer, the main power cable for the A11H was removed from the wall to simulate a power outage. The software showed that battery backup time for the system should have been about 10 minutes. However, I was pleasantly surprised to see the system still running at 12 minutes. At that point the battery charge level dropped to 30% and the SANUPS control software gave a warning that the battery was low and the system would be shutting down, which started after another 40 seconds. By the percentage left when the UPS shut down the PC, another 5 minutes may have been possible. That brings the total backup time to about 17 minutes, which is slightly longer than the 15 minutes claimed by Sanyo Denki under a 50% load. The SANUPS software allows multiple settings for the shutdown time, including when the battery is low (as tested), when the remaining backup time reaches as little as 2 minutes, or any amount of time after the power failure occurs.