I have a WS-12-250-AC that draws aprox 50w according to the Bar at the top of the gui.
Now this switch is running on a UPS that has a 700w AC Inverter/Charger with a 100amp/h 12v Battery.
How can I estimate the runtime of this switch when running solely on battery?
Looking for the right formula to make this estimate so any help is appreciated.
Help Calculate Runtime
- Julian
Re: Help Calculate Runtime
The best place to start would be putting an ammeter between the battery and inverter - this will give you a very clear idea of how many amps you're drawing.
Since we don't have that, here's an example of the power math.
50w / (approximate efficiency of inverter, say 80%) is 62.5w, which at 12 v is 5.2A. Watts = Volts * Amps.
When you're trying to figure out how many hours your battery will last, you: (rated amp hours)/(amps)=Hours, so 100/5.2= 19.23 hours, or 19 hours and 13 minutes. Battery Capacity = Amps * Hours.
That's the gist of the math, anyway.
Since we don't have that, here's an example of the power math.
50w / (approximate efficiency of inverter, say 80%) is 62.5w, which at 12 v is 5.2A. Watts = Volts * Amps.
When you're trying to figure out how many hours your battery will last, you: (rated amp hours)/(amps)=Hours, so 100/5.2= 19.23 hours, or 19 hours and 13 minutes. Battery Capacity = Amps * Hours.
That's the gist of the math, anyway.
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