Tools
Calculators
Every calculator here shows its formula and its sources — no black boxes, no "trust us" outputs.
All figures below are estimates for general planning, not a formal quote — real numbers depend on your specific home, equipment, usage, and local rates. Get an actual quote before making a purchase decision.
Solar Savings Calculator
Estimate savings and payback from your actual bill and rate.
Solar ROI Calculator
Break-even year and 25-year ROI for a known system cost.
Battery ROI Calculator
Time-of-use arbitrage savings for a standalone or paired battery.
Electric Bill Estimator
Estimate a monthly bill from appliance-level usage.
Heat Pump Savings Calculator
Compare heat pump cost against your existing furnace type.
EV Charging Cost Calculator
Home charging cost per mile vs. an equivalent gas vehicle.
Federal Tax Credit Calculator
Covers both the solar/battery credit and the efficiency credit.
Home Energy Savings Calculator
Combined effect of stacking efficiency upgrades.
Payback Period Comparison
Cash vs. loan vs. lease/PPA, compared side by side.
Net Metering Value Estimator
What your exported solar power is actually worth.
Solar Size Calculator
Recommended system size (kW) and panel count for your usage.
Solar Roof Calculator
Maximum system size and panel count your roof can physically fit.
Battery Backup Calculator
Backup runtime hours for the specific loads you pick.
Electricity Bill Calculator
Project a bill from a usage total and flat or tiered rate structure.
EV Savings Calculator
Total annual savings vs. gas — fuel plus maintenance.
ROI Calculator
General-purpose ROI and payback for any home energy upgrade.
Payback Calculator
Simple payback period with a year-by-year savings breakdown.
Net Metering Calculator
Your annual true-up — surplus payout or deficit owed.
Carbon Footprint Calculator
CO2 emissions avoided from solar, EV driving, and reduced gas use.
Solar Loan Calculator
Monthly payment and total interest for a solar loan.