Energy decision tools
Make smarter energy decisions
Free calculators to estimate your electricity bill, appliance and AC running costs, inverter and battery size, and where your home can save power.
Energy calculators
Electricity billEstimate your monthly electricity bill from consumption and tariff details.Home energy auditBuild a ranked home appliance inventory to find monthly electricity use, cost contribution and practical savings opportunities.Appliance running costSee what an appliance may cost to run per day, month, and year.Appliance upgrade savingsCompare an existing and replacement appliance to estimate energy savings, payback and multiyear net savings.Time-of-day savingsCompare appliance schedules across explicit peak and off-peak windows, including schedules that cross midnight.AC running costEstimate the electricity use and running cost of an air conditioner.Inverter sizeEstimate the inverter capacity needed for your essential home loads.Battery backupEstimate battery capacity for the backup duration your home needs.
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Solar
Estimate the right system, cost, subsidy, savings, and payback.
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Compare charging costs, petrol alternatives, and solar charging.
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Plan a car purchase: affordability, down payment, loan EMI, new vs used, ownership cost, resale, fuel and insurance.
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Plan buying and running a home: affordability, rent vs buy, stamp duty, loans, prepayment, upkeep, renovation, water and energy.
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