01 / Solar
Open tracker →Solar Savings Tracker
Compare old bills, projected no-solar costs, solar bills, and loan payback month by month.
A practical energy toolkit
Make the next electricity decision with better numbers.
Clear, browser-based calculators for households and small businesses exploring solar, bills, and everyday energy use.
2 toolsfor the questions that usually start with “what if?”
The toolbox
Start with a real question.
Simple inputs. Transparent formulas.
02 / Home energy
Open calculator →Appliances Calculator
Turn wattage and habits into a useful estimate of monthly kWh and cost.
Built for clarity
The math stays visible.
These tools run in your browser and keep the formulas straightforward, so you can test assumptions, compare scenarios, and bring useful numbers to an installer conversation.
Field notes
Better energy decisions start with better inputs.
Useful context for using the tools well.
Start with a real bill
Use the kWh and price per kWh from a recent electricity bill instead of relying on a monthly guess. A few accurate months will give you a more useful picture of seasonal changes.
Separate use from price
Electricity cost changes when consumption changes, but it also changes when the utility rate changes. Keeping those inputs separate makes a solar comparison easier to explain and audit.
Test the quiet assumptions
Solar output, loan terms, appliance schedules, and future rates are estimates. Try a conservative scenario as well as an optimistic one before making a purchase decision.
Common questions
What the numbers mean.
Are these calculators financial advice?
No. They are planning tools that use the values you enter. Use the results to compare scenarios, then confirm system design, financing, and savings estimates with qualified professionals.
What does “no solar” mean?
It is an estimate of what the bill could have been without solar, based on the consumption and electricity rate you enter. It is useful as a comparison baseline, not a guaranteed future bill.
Where does my calculator data go?
Calculations run in the browser. The tools do not need an account, and the solar tracker can be extended to save a CSV locally on your device. Read the Privacy Policy for more detail.