Explore simple tools designed to make home-energy systems easier to understand.
Calculate charging times, explore solar and battery behaviour, compare system sizes and see how electricity moves around the home.
The tools are designed to answer one question at a time without requiring technical knowledge.
Featured Tools
Available now
How long will your EV take to charge — and what could it cost?
Enter the vehicle battery size, current charge level, target charge, charger power and electricity tariff.
The calculator estimates:
- energy required
- charging time
- finish time
- charging cost
- cheap-rate and standard-rate usage
Available now
See what happens when solar generation is higher or lower than household demand.
Explore how electricity can flow from solar to the home and out to the grid.
Battery Storage Tools
Available now
Battery Energy Flow Visualiser
See a home battery charge from solar or the grid and discharge to support household demand.
Available now
Home Battery Sizing Calculator
Explore suitable battery capacity based on the electricity you want to move, solar surplus, tariff windows, usable capacity and backup requirements.
Solar PV Tools
Coming soon
Solar Direction Visualiser
Compare how south-, east-, west- and north-facing solar arrays can change annual yield and generation timing.
Designed to Explain, Not Just Calculate
Energy systems can become complicated very quickly.
Our tools simplify individual concepts so you can understand what is happening before moving into deeper technical detail.
Where calculations are used, assumptions are shown wherever practical. Results are intended for education and comparison rather than replacing a site-specific design or professional assessment.
Browse by Subject
- Solar PV
- Panels, inverters, generation and system design.
- Battery Storage
- Capacity, power, tariffs, backup and battery behaviour.
- EV Charging
- Charging speed, cost, solar charging and load management.
- Whole-Home Energy
- See how solar, batteries, EV charging, heating and the grid work together.