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Both calculators run independently — change the inputs on either side to compare results.
Appliance Energy Cost Calculator
Calculate the true annual electricity cost of any appliance using its wattage, daily usage hours, days per week, your electricity rate, and the number of units. Essential for budgeting solar or identifying energy hogs.
Annual running cost
262.08 $/yr
$100-300/yr marks a major load like a space heater or old fridge. The $262 example heater costs about $22/month; cutting use 2 h/day would save around $90/yr.
Annual cost scales directly with watts, runtime, and rate; the US average residential rate is about $0.16/kWh, the basis of the verified $262/yr example for a 1500 W heater run 3 h/day.
Solar Savings Calculator
Calculate monthly bill savings from a solar PV system by multiplying solar production by your electricity rate. Use it to estimate the financial benefit of an installed or planned system month-by-month.
Key differences
| Appliance Energy Cost Calculator | Solar Savings Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 5 | 2 |
| Result | Annual running cost ($/yr) | Monthly Savings ($) |
| What it does | Calculate the true annual electricity cost of any appliance using its wattage, daily usage hours, days per week, your electricity rate, and the number of units. Essential for budgeting solar or identifying energy hogs. | Calculate monthly bill savings from a solar PV system by multiplying solar production by your electricity rate. Use it to estimate the financial benefit of an installed or planned system month-by-month. |