Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Climate
Rainwater Harvesting Calculator
Estimate how many gallons of rainwater your roof can collect each year and how much you could save on your water bill. Ideal for homeowners planning a rain barrel or cistern system.
Fill in the required fields to see your result.
Climate
Solar Panel Savings Calculator
Estimate your annual savings from going solar based on system size, local sun exposure, installation cost, and available tax credits. Ideal for homeowners comparing solar quotes or planning a residential installation.
Fill in the required fields to see your result.
Key differences
| Rainwater Harvesting Calculator | Solar Panel Savings Calculator | |
|---|---|---|
| Category | Climate | Climate |
| Inputs required | 4 | 4 |
| Result | Annual Water Cost Savings ($) | Annual Net Savings After 25 Years ($) |
| What it does | Estimate how many gallons of rainwater your roof can collect each year and how much you could save on your water bill. Ideal for homeowners planning a rain barrel or cistern system. | Estimate your annual savings from going solar based on system size, local sun exposure, installation cost, and available tax credits. Ideal for homeowners comparing solar quotes or planning a residential installation. |