Watts are handy if your electricity is priced around 11.4 cents per kWh. If that's the case, 1 Watt continuously = 1 USD per year. (scale up or down to suit you

Watts are handy if your electricity is priced around 11.4 cents per kWh. If that's the case, 1 Watt continuously = 1 USD per year. (scale up or down to suit your tariff) (1 watt = 8.76 kWh/yr)