I just want to know if there a huge difference between 1.6 amp and 3 amp power usage.
The answer depends on:
- hours used a day (lets assume 10)
- days used a week (assume 7)
- rate charged by your power company (assume 13 cents per kilowatt hour)
Under these assumptions, the difference is about $500 a year.
You can refer to the chart below if you want to change the hours, days, or rate.