01
Understand the whole home
Bring demand, generation, storage, heating, EVs and tariffs into one coherent energy model.
Plan your home energy
A smarter plan for your home energy.
Compare solar panels, battery storage, heat pumps, EV charging and electricity tariffs in one home energy calculator. Start with your annual use or half-hourly meter data.
Privacy-minimised Assumptions visible You stay in control
Solar3.8 kW
Battery78%
Grid0.6 kW
HOMEOptimising
One connected picture
Homes are becoming energy systems.
They should behave like one.
See how equipment and electricity tariffs work together before you invest. Zion's simulation engine compares your current home, a tariff change, standard operation and an optimised system. Results are indicative and include the assumptions your installer needs to review.
Make informed choices
Start with a home energy guide.
Solar panel, battery and inverter sizing
Learn how to size solar panels, a home battery and an inverter for a UK home, with worked examples, tariff considerations and a checklist for installer quotes.
Read the guide →Compare time-of-use electricity tariffs
Compare flat, multi-rate and half-hourly electricity tariffs using your consumption. Understand standing charges, dated prices and a fixed baseline.
Read the guide →Plan a boiler-to-heat-pump upgrade
Explore heat-pump running costs alongside solar, batteries and tariffs. Learn what a home estimate can show and what needs a heat-loss survey.
Read the guide →02
Test before you invest
Compare practical scenarios and see costs, carbon, assumptions and uncertainty before equipment changes.
03
Move from insight to action
Develop towards a secure Home Assistant connection that can receive data and coordinate devices for you.
Where this is heading
Simulation today.
A living energy brain tomorrow.
The end goal is a system that securely exchanges data and instructions with your Home Assistant instance—forecasting what your home needs, then coordinating assets efficiently and effectively.
See the simulation foundationNOW
Simulate
Model the home, compare scenarios and make uncertainty visible.
NEXT
Learn
Validate recommendations with consented, de-identified energy patterns.
VISION
Coordinate
Connect to Home Assistant and turn trusted plans into live control.
Help shape the system
Your home could help make home energy better.
Create a customer account to plan your home energy, or an installer account to help customers design their systems.