6105 power consumption

[rsaha]

This has probably been done to death but search is so slow I'm having trouble finding it. I want to run one of my 6105s on a UPS to keep flow going during power outages. The Tunze website/manual only give the 35W at 24V value. In alot of the other manuals they provide ranges so I'm wondering why the numbers are presented only as a max for the 6105. I want to size the appropriate UPS.

Does P=IV hold true for the 6105 (i.e. current stays the same and if V drops from 24 to 12 max watts is 35W/2=17.5W?). Also I am only running them 30-60 percent at 12V. Do you have some guidance how power consumption varies with frequency?

Thanks as always!

 

[rvitko]

For 18V the power draw is 22W, for 12V it is 14W and that is at 100%, I wouldn't have figures for the 30-60% range. You can fairly safely rely on 1 aH equalling almost 1 hour of run time at 12V, for example with safety connector 6105.500 and 12V battery, AUPS would be less efficient as you are switching DC to AC and back to DC. The relationship is not quite linear it is parabolic and it takes increasingly more power to increase flow.

 

[rsaha]

Thanks Roger, that's plenty of info.