In beta. Free for kit we are still verifying. See what that means. Free while we verify your kit
Launching in the UK

Reducing your electricity bills

Joule Genie connects your solar, battery, EV and smart tariff into one intelligent system. It optimises every half-hour slot so you pay less and waste less.

Your battery is wasted without it

Most battery owners charge and discharge on fixed schedules - missing super cheap plunge slots. Joule Genie shifts every kWh to the optimal window, turning your hardware investment into measurable savings.

Free while we are still proving your kit. Once every part of your setup is verified, it is £44.99 a year.

Check my kit → See How It Works
The Joule Genie dashboard on a phone: a ring showing live grid export, this week's saving, and system health for the connected inverter and tariff.
The Joule Genie dashboard: an isometric energy flow from solar and battery through the home to the grid, alongside this week's saving, system health and tomorrow's cheap window.

Real screenshots of the app, running on sample data.

We show what you saved against what your inverter’s own timer would have done — priced from your supplier’s half-hourly meter readings once the day settles, not estimated. Until it settles we label it an estimate, because that is what it is. How we measure.
Free Miles

Charge for Free — or Get Paid

Charge your EV for free or even make money from charging. Leaving you with more money to enjoy life's journeys.

48
Half-hour slots optimised daily
2
Baselines every day is priced against
5min
Optimiser refresh cycle
24/7
Autonomous operation

What does it do

An intelligent optimiser

Joule Genie analyses your tariff rates across 48 half-hour slots. Using the solar forecast, battery state and EV schedule it builds the cheapest charge/discharge programme and pushes it directly to your inverter.

Savings Tracking

The feel good factor

Every single day you can do a side-by-side cost comparison: what you paid versus what you would have paid without the optimiser.

How It Works

Set Up in Minutes

Connect your hardware, let the optimiser learn your patterns, then sit back and save.

Connect

Add your inverter, tariff and EV through a guided setup wizard. No technical knowledge needed.

Observe

Shadow mode shows exactly what the optimiser would do—so you can build confidence before going live.

Optimise

Go live and the engine pushes the cheapest charge schedule to your inverter every five minutes, automatically.

Save

Watch your savings grow on the dashboard. Track daily, weekly and monthly cost reductions in real time.

Stop Overpaying for Electricity

Join the UK home owners who let Joule Genie handle every half-hour decision, so they don't have to.

Check my kit →