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
One connected system 08:00
Generate Store Use
OvernightMorningAfternoonEvening
Let the sunlight take over.
Solar supplies the home, with the extra energy going into storage.
- Solar
- 2.7 kW
- To battery
- 0.9 kW
- Grid import
- 0.0 kW
Illustrative day · fictional energy values
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
Understand UK time-of-use electricity tariffs, with worked bill comparisons, off-peak break-even examples and practical advice for EVs, heat pumps, solar and batteries.
Read the guide →Plan a boiler-to-heat-pump upgrade
Plan a UK boiler-to-heat-pump upgrade with practical guidance on heat-loss sizing, radiators, hot water, COP, running-cost examples, installation quotes and grants.
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.