Compact
About 9.5 kWh battery
~£240 / year
A 2 to 3 bed home. Fills when power is cheap and runs the evening peak from the battery.
Why a timer isn’t enough
One day, two ways: the timer cost £4.96, Orza’s plan cost £3.38.
Electricity prices now change every half hour: above 30p at the evening peak, sometimes below zero on a windy afternoon. Most batteries still run a fixed timer. Charge overnight, empty in the evening, whatever tomorrow brings.
14 October 2025, two ways to run itImport price, each half hour
A fixed timerCosts £4.96
Orza’s planCosts £3.38 · £1.58 less
- 101:30 to 04:00Both fill up overnightAt about 16p, the cheapest of the day, the timer and Orza charge the battery the same way.
- 211:00 to 12:30Orza tops up over lunchTonight’s 59.9p peak is already known, so Orza buys more at about 19p. A timer can’t.
- 316:00 to 20:30Orza runs the home through the peakThe timer’s battery is empty by 17:30, and the home buys at up to 59.9p. Orza’s lasts until 20:30.
Real household backtests · 460,000+ days of plans tested
What Orza saves across UK battery sizes.
A whole year for each size, planned half hour by half hour and set against the same battery left to itself. Tested on smart, EV and dynamic tariffs.
Typical solar home Most common
About 13.5 kWh battery
£360 / year
Rooftop solar and a family’s use. Stores the sun, tops up cheaply and sells at the peak.
Large stack, high usage
20 to 30+ kWh battery
£500 to £970 / year
Bigger homes, often with an EV or a heat pump. More room to buy cheap and sell dear.
Want the exact figure for your house?
Connect in Monitor only. Orza scores your own days and tariff without changing a setting on your battery.
The product
One app shows what Orza does next, and what it saved.
Orza reads your system every five minutes through your maker’s cloud and plans again every half hour. Every step comes with its reason, and every day with what it saved, losing days in red.
Coming up
What the plan does next
| When | What | Import price |
|---|---|---|
| Now | Your home runs from the battery5.2 kWh to your home | 21.0 to 50.6p |
| Fri 02:00 | Charging the battery from the grid2.4 kWh into the battery | 11.2 to 13.0p |
| Fri 10:00 | Your solar runs your home and tops up the battery5.0 kWh into the battery | 21.4 to 26.0p |
£5.68+£1.08 today
Savings Estimated savings with Orza, last 7 days
Getting started
Set up in 2 minutes. Nothing to install.
Orza reaches your battery the way your maker’s app does, through its cloud. No hub, no box and nothing on your home network.
- Starts in Monitor onlyOrza plans alongside what your battery does today and sends nothing. Savings shows what its plan would have saved, day by day.
- You choose when it takes overOrza only controls your battery once you switch on Automatic control. Pause, and your battery goes straight back to its own settings.
- Your login, encryptedLocked the moment you save it. Only Orza’s server can open it.
Questions
Before you connect your battery.
The short answers. The technical FAQ covers how the connection works, how the plan is built and how the saving is scored.
Read the technical FAQWhat is Orza?
Orza is free smart scheduling software for home batteries in the UK. It plans your battery every half hour around your tariff’s prices, your solar forecast and how your home uses power, through your battery maker’s own cloud, so there is nothing to install. It shows each decision and what it saved, and when you choose, it runs the battery for you. Free, with no card.
Does Orza replace my battery maker’s app?
No. Keep it for warranty registration, firmware updates and safety alerts. Orza sits alongside it as the plan, reaching your system through the same cloud your maker’s app uses.
Which batteries and suppliers does it work with?
Sigenergy, SolarEdge, Tesla Powerwall, FoxESS, Solis, Sunsynk, SolaX, Deye, AlphaESS and GivEnergy batteries, and Octopus, British Gas, OVO, E.ON Next, EDF and ScottishPower tariffs, including dynamic and time of use tariffs for import and export.
What happens if my internet or the maker’s cloud goes down?
Your battery keeps running. Orza is never in the power path. The half hours it couldn’t read are shown as missing, and left out of your savings rather than guessed.
What does it cost?
Nothing right now: everything is free while we spread the word, and no card is needed to join. Paid tiers will come later, and there will always be a free version.
See what Orza would do with your battery.
Free, with no card. Look round an example home first, and connect your battery when you’re ready.