On Wed, 30 Jan 2002 11:19:28 -0500 (EST), Mike Dresser wrote: >On Wed, 30 Jan 2002, Henry House wrote: >
>Don't be fooled by VA ratings. Go find a standard load on whatever you're >comparing, and see how long the actual run time is. I could make a 300VA >unit, that will run for 6 weeks off a 9 volt battery that fits in your >pocket. The only thing is, I'm going to plug an LED and resistor into the >output. 6 week runtime! > Does any UPS mfg offer ampere-hour ratings? I would expect to see a table representing operating time at 1) max current rating, 2) current at max time, and 3) optimal time-current. The rating should specify the output voltage range (fresh charge and final) of the measurements. Deep discharge battery banks used in emergency services, such as Ham radio, use such a rating system. The UPS's I've looked at don't even publish the battery specs. (can I substitute my 60ah gel cells?) In this day and age, I guess that's too straight-forward and honest. gt Yes I fear I am living beyond my mental means--Nash