How Joule Genie Optimises Your Energy
From setup to savings in four simple steps. No technical expertise required.
Connect
Add your inverter, energy tariff, EV charger and vehicle through a guided setup wizard. Enter your credentials once and we handle the rest.
Observe
Shadow mode shows exactly what the optimiser would do—without touching your hardware. Build confidence before handing over control.
Optimise
Go live and the engine calculates the cheapest energy schedule and pushes it 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.
Watch Before You Trust
Shadow mode is your safety net. When you first connect your system, Joule Genie runs in observation mode. It monitors your energy flows, calculates what the optimal schedule would look like, and shows you the results—all without sending a single command to your hardware.
You see exactly what the optimiser would do and how much it would save, day after day. When you're confident it's making the right decisions, flip the switch to active mode with a single tap. You can switch back to shadow mode any time.
We Enable Better Choices
Not all energy tariffs are created equal. In many cases, you'll only be paid for exporting electricity if you're on the right export tariff—and without it, you could be missing out on valuable savings.
Joule Genie continuously monitors your setup and will alert you if your current tariff is limiting your ability to reduce costs or maximise returns, helping you switch to options that truly work in your favour.
Intelligent Scheduling, Every 5 Minutes
Our engine continuously analyses your energy landscape and builds the cheapest possible schedule for the next 24 hours.
Gather Your Data
Every 5 minutes, the optimiser collects your current battery state of charge, solar generation forecast, half-hourly energy rates, household load patterns, and EV charging requirements.
Calculate the Optimal Plan
Our engine evaluates all 48 half-hour slots in the day, working out the cheapest combination of when to charge from the grid, when to discharge to the home, and when to store surplus solar. It considers rate spreads, battery capacity, and power limits.
Send the Schedule
The optimised programme is sent directly to your inverter. Up to 6 time-based slots tell your battery exactly when to charge and when to discharge, maximising savings automatically.
Measure the Savings
Every cycle, we calculate what the day would cost without optimisation versus with it. The difference is your saving. These figures are updated in real time on your dashboard.
Three Ways We Save You Money
The optimiser exploits every opportunity in the energy market to reduce your bill.
Rate Arbitrage
On variable tariffs like Octopus Agile, electricity prices change every 30 minutes. We charge your battery during the cheapest slots (often as low as 5-10p/kWh) and discharge during peak prices (25-35p+). The bigger the spread, the bigger your savings.
Solar Self-Consumption
Without optimisation, excess solar is exported at low rates (around 5p/kWh). Joule Genie stores your surplus solar in the battery and uses it later when import rates climb to 20-35p/kWh, capturing the full price difference.
EV Smart Charging
When your vehicle is plugged in, the optimiser identifies the cheapest rate windows before your departure time and schedules charging into those slots. For a large EV battery, this can save several pounds per charge session.
Wednesday 8 July 2026
Our own home, not a simulation: a 10 kWh SunSynk battery on Octopus Agile, with solar. What we paid is read from the meter — your supplier’s own settled half-hourly readings, the same ones the bill is built from, and all 48 of that day’s slots had settled. The two comparisons are modelled: we take the same day’s measured load and solar and replay it without a battery, and again through a typical timer, priced at the same half-hourly rates you were charged.
That day the house imported 22.4 kWh, generated 18.1 kWh of solar and exported 3.0 kWh.
Why this day. It is the median day by saving against the timer across our 61 settled days — not the best one, picked deliberately, because the best day would tell you nothing about a normal one. Across those 61 days the middle day saved £1.71 against the timer, and the timer beat us on 8 of them. This is one household with one tariff and one battery; it is a worked example, not a prediction for your home. See how we measure.
Gets Smarter Over Time
The longer Joule Genie runs, the better it gets at predicting and optimising your energy use.
Solar Calibration
The system tracks how its solar forecasts compare against your actual generation over a rolling window, and corrects future forecasts by what it has been consistently over- or under-reading. It does not try to model why: whatever is systematically off for your roof—a shaded corner, a panel derate, local weather that the forecast misses—shows up in the correction without needing to be described.
Load Profiling
Your household consumption isn't static. Joule Genie builds a profile of your typical usage patterns throughout the day, smoothing out anomalies and adapting to seasonal changes so the schedule always reflects reality.
Continuous Improvement
The optimiser recalculates every 5 minutes, not just once a day. If conditions change—unexpected cloud cover, a rate spike, or your EV being plugged in early—the schedule adapts immediately.
Ready to See It in Action?
Register your interest and start saving with intelligent energy optimisation.