Monthly consumption
Peak vs off-peak. Grey is single-rate usage (before half-hourly billing), spread evenly from the bill. Partial months are marked *.
Import your bills to get started
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Works with bills from
Private by design
Your bills are read and stored in this browser. Nothing is uploaded, and there's no account to create.
What you'll get from your bills
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See where your money goes
Every month and every day split into peak and off-peak use, with the cost of each, so you can spot the expensive habits.
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Know when you use energy
Your average day, half-hour by half-hour, drawn from the readings in your bills. See how much already lands in the cheap window.
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Save by shifting
Find out what moving laundry, the dishwasher or EV charging into the off-peak hours would save you each month.
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Plan a battery or solar
Price real quotes line by line, compare setups side by side and see how many years each takes to pay for itself.
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Compare another tariff
Enter a rival supplier's rates and off-peak hours to see what your actual usage would cost, with or without an install.
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Fund it on a 0% card
Model paying for the install on a credit card from your monthly energy savings: promo period, minimum payments and balance transfers included.
No data yet. Import your bills on the Overview tab to see this page.
Your energy at a glance
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Daily consumption
Every day in the selected month.
Bills
When you use energy
Average kWh in each half-hour of the day, across all imported days.
Average day
Shift peak to off-peak
What if you moved some usage (EV charging, laundry, dishwasher, immersion) into the cheap window?
Monthly bill: now vs shifted
Battery & solar payback
A battery charges in the off-peak window and powers the house at peak times. Solar offsets daytime usage and exports the rest.
Cumulative position
Savings to date minus installation cost. Payback is where it crosses £0.
Compare configurations
Running costs by scenario
Install costs
Itemise this configuration's quote. Totals replace the battery and solar costs, and are saved.
Fund it on a credit card
Put the install on a 0% purchase card and pay it down with the monthly savings.