Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Solar Energy
Solar Panel System Sizing Calculator
Find out exactly how many solar panels your home needs to cover its electricity usage. Enter your monthly consumption, local sun hours, panel wattage, and system efficiency to get a panel count.
Fill in the required fields to see your result.
Solar Energy
Solar Panel Cost Savings Calculator
Project your total 25-year net savings from going solar, accounting for electricity rate inflation and panel degradation. Use this before getting installer quotes to set realistic financial expectations.
Fill in the required fields to see your result.
Key differences
| Solar Panel System Sizing Calculator | Solar Panel Cost Savings Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 4 | 5 |
| Result | Number of Panels Needed (panels) | 25-Year Net Savings ($) |
| What it does | Find out exactly how many solar panels your home needs to cover its electricity usage. Enter your monthly consumption, local sun hours, panel wattage, and system efficiency to get a panel count. | Project your total 25-year net savings from going solar, accounting for electricity rate inflation and panel degradation. Use this before getting installer quotes to set realistic financial expectations. |