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Home energy calculators, rates, rebates and reference data.

Calculate what your home uses, what it costs, and what upgrades could change it—with assumptions and sources you can inspect.

High demandElectricity CostAppliance Running CostElectricity Bill EstimatorWatts ↔ kWh CalculatorAppliance Wattage & UsageEnergy Conversion Tables

Popular tools

Working core electricity tools first, with later roadmap resources clearly marked.

Available ready now Planned roadmap

Electricity CostCalculate cost from electricity use in kWh and your own rate.AvailableAppliance Running CostSee what an appliance costs to run by hour, day, month, or year.AvailableElectricity Bill EstimatorEstimate a monthly bill from kWh, your rate, and optional supplied charges.AvailableWatts ↔ kWh CalculatorCalculate energy from power and time, or power from energy and time.Available
Solar System SizingEstimate system size, panel count, and annual production.Planned
Heat Pump Running CostEstimate heat-pump electricity use and compare operating costs.Planned
EV Home ChargingEstimate home charging time, energy use, and electricity cost.Planned
Battery RuntimeEstimate how long a home battery or power station can run a load.Planned

Browse by category

See direct tool and resource names without navigating through a marketing funnel.

Electricity & Appliances

Estimate household electricity use and appliance operating cost.

Solar

Plan system size, output, panel count, and solar economics.

  • Solar System SizingPlanned
  • Peak Sun HoursPlanned

Heating & Cooling

Compare heating systems, cooling loads, efficiency, and sizing.

  • Heat Pump Running CostPlanned
  • Heat-Pump EfficiencyPlanned

EV Charging

Understand home charging time, energy use, and cost.

  • EV Home ChargingPlanned
  • EV Energy SpecsPlanned

Batteries & Backup

Explore battery runtime, essential loads, and generator sizing.

  • Battery RuntimePlanned
  • Generator Starting WattsPlanned

Rates & Rebates

Find regional electricity rates and official incentive programs.

  • Electricity RatesPlanned
  • Rebate & Incentive FinderPlanned

Look up & compare

Use source-backed appliance data and bounded energy references without relying on generic hidden defaults.

Appliance Wattage & UsageAvailableEnergy Conversion TablesAvailableMethodology & SourcesAvailable
Electricity RatesPlanned
Rebate & Incentive FinderPlanned
EV Energy SpecsPlanned
Peak Sun HoursPlanned
Heat-Pump EfficiencyPlanned

Rates & rebates by region

Regional tools will distinguish published averages from your actual tariff and link directly to official program rules. They will not claim eligibility the source cannot prove.

Regional lookup controls activate when verified datasets are published.

Electricity RatesLook up published regional rate references with source dates.Planned
Rebate & Incentive FinderFind official energy programs without overstating eligibility.Planned

Data you can verify

Important numbers should show where they came from, when they applied, and what assumptions turn them into an estimate.

Read our methodology and source standards
  • Authority firstGovernment, regulators, program administrators, and manufacturers outrank secondary summaries.
  • Visible assumptionsMaterial defaults and estimate limitations remain inspectable and editable where practical.
  • Dates that mean somethingChanging records carry effective, source-updated, or last-verified dates as available.
  • Correction pathSource updates and errors have a visible reporting route.