Practical energy guides
Short, transparent explanations that help you choose stronger calculator inputs and understand the result.
kW, kWh and amps: the practical difference
A practical guide to power, energy and current for home electricity and EV charging.
Practical guideHow to choose realistic EV consumption
Use real driving data instead of relying on one official efficiency number.
Practical guideHome battery sizing without guesswork
Turn measured household demand into a practical battery-capacity estimate.
Practical guideInputs that make a solar payback estimate useful
Understand yield, self-consumption and export value before calculating payback.
Practical guide3.7, 7.4, 11 or 22 kW home EV charging?
Choose a useful home-charging speed based on the car and electrical supply.
Practical guideWhy power-station runtime differs from the label
Understand conversion losses, duty cycle and startup power.
Check your charging bill
A worked charging-bill audit with measurement boundaries, fees, mixed tariffs and a reusable recording checklist.
Audit an EV charging bill: from battery percentage to cost per kilometre →IONIQ 5 owner observations: build a trip energy reserve
Compare two reported consumption observations with your own route, usable capacity and charge reserve. Export a calculation record.
Compare energy budgets →