Global home-energy and project guides
Plain-language explanations, worked examples and official verification links for bills, labels, tariffs, solar, batteries and international property units.
How to read and compare electricity bills
Find energy use, rates, fixed charges and billing days, then explain what changed between two electricity bills.
Read guide 02Choose the right rateEffective electricity rate vs marginal tariff rate
Understand when total bill divided by kWh is useful and when a tariff's marginal rate is the safer input.
Read guide 03Fixed bill linesStanding, supply and customer charges explained
Compare daily and monthly fixed electricity charges without mixing them with usage savings.
Read guide 04Peak vs off-peakHow to find the break-even point for a time-of-use plan
Compare a time-of-use electricity plan with a flat rate using the same kWh and fixed charges.
Read guide 05Use the model recordHow to compare appliance energy labels across markets
Use annual kWh from EnergyGuide, EnerGuide, EU, Australian, New Zealand and Singapore labels correctly.
Read guide 06Battery vs wall energyHow to estimate home EV charging cost
Calculate EV energy drawn from the wall, charging losses and cost per 100 km or miles.
Read guide 07Same heat, different inputHeat-pump COP and electricity cost in simple words
Compare heat-pump and resistance-heater electricity using the same useful heat demand.
Read guide 08Use it or export itWhy solar self-consumption matters more than total generation
Value solar electricity used at home separately from exported electricity with transparent rates.
Read guide 09Storage without double countingHome battery rate shifting after round-trip losses
Estimate delivered battery energy, charging input and gross tariff-spread value before payback claims.
Read guide 010Property unit translatorSquare feet, square metres, acres and hectares across countries
Convert standard property units without confusing unit translation with legal or listing-area definitions.
Read guide 011Use, export or lose itAustralia solar export limits and curtailment
Estimate how an Australian solar export limit changes self-consumption, exported energy and curtailed generation using your monitoring data and rates.
Read guide 012Shift use with evidenceIndia smart-meter Time-of-Day tariff guide
Check whether moving flexible electricity use into solar hours could change an Indian smart-meter bill without assuming one national tariff or schedule.
Read guide 013Cooling meets the slabDubai AC electricity cost across DEWA slabs
Estimate how cooling energy moves a Dubai account across DEWA slabs, with current cubic-metre water billing, dated fuel surcharges and VAT.
Read guide 014Meter readings to utility billSingapore electricity and water bill calculator guide
Calculate Singapore household electricity and water from meter readings, dated official schedules, GST and separately identified credits.
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