ericrazar
join:2007-11-04
Orlando, FL
| reply to shortckt
Re: Home UPS powered by car battery: failed
I found you can reprogram com port smartups with a hyperterminal program to "fool" the ups there are more external batteries. the powerchute software should be able to do it on XL series units but when running regular smartups the power chute shows the external batteries as a "grayed" unchangable field.
»www.apcmedia.com/salestools/ASTE···0_EN.pdf |
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ericrazar
join:2007-11-04
Orlando, FL
| I just finished running a new cal for my apc smartups 1000 VA unit after reprogramming it to think it has 10 external batteries like a 1000xl unit using the hyperterminal example link before. I modified My smartups 1000 to use two external 125 amp hour marine batteries in series where before recoding the unit would have similar run time of only 40 or so minutes even with the large batteries. Now I just got 12 hours of discharge from the setup running a 24% ups load (~160 watts) for 12 hrs. For those of you who have a RS232 com port smartups 1000/1400/2200/3000, you should be able to recode them as well to think they have up to 10 external batteries even though they are not the XL series type UPS's. The only issue is the internal charging circuit for the 1000 va ups will take a long time to recharge an external battery that large. I will look into that issue as well eventually with some external supply to charge the battery set.
»www.apcmedia.com/salestools/ASTE···0_EN.pdf |
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mworks
join:2006-06-13
Faison, NC
| One thing to watch when you extend a ups run time is cooling inside the ups. Some were not designed with cooling to allow for several hours running and will overheat causing failure.
I have an apc ups that I extended the run time on with external batteries , but I placed a 12v dc fan inside the case to help with the heat. |
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