Compare calculators
Both calculators run independently — 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
Optimal Solar Panel Angle Calculator
Estimates the optimal fixed tilt angle for a solar panel based on your latitude and the season you want to optimize for. Useful for fixed-tilt mounting decisions, seasonal-adjustment planning, and rough-design sizing for off-grid systems.
Fill in the required fields to see your result.
Key differences
| Solar Panel System Sizing Calculator | Optimal Solar Panel Angle Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 4 | 2 |
| Result | Number of Panels Needed (panels) | Optimal Tilt Angle (degrees) |
| 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. | Estimates the optimal fixed tilt angle for a solar panel based on your latitude and the season you want to optimize for. Useful for fixed-tilt mounting decisions, seasonal-adjustment planning, and rough-design sizing for off-grid systems. |