Terms for the beta.

Between you and us

These terms are between you and Louis Cross, trading as Orza, in the United Kingdom ("we", "us"). By creating an account you accept them. If you do not, do not create one. You can reach us at hello@orza.co.uk.

It is free today, and there will always be a free version

Everything in the beta costs nothing. We take no payment details, there is no subscription, no trial that converts, and no tier you can be upgraded into. We plan to add paid tiers in future, and we are committed to always keeping a free version of Orza. We will tell you before any paid tier arrives, and you would have to agree to it separately.

Who can use it

You must be 18 or over, and you must either own the battery system you connect or be authorised by its owner to connect it. You will need an account with your battery manufacturer, and their terms continue to apply to it.

It reads, it plans, and it controls only if you ask it to

Orza reads your battery system through your manufacturer's cloud API, plans its use every half hour against electricity prices, a solar forecast and your home's usage, and shows you what that plan was worth against what your system actually did.

The four modes

Monitor only: Orza reads your system and works out what its plan would have saved. It sends nothing.

Assisted: Orza shows its plan as advice every half hour. It sends nothing, and what your battery does is up to you; entries you add to your Schedule reach your battery only under Automatic control.

Automatic control: Orza sends its plan, and any entries in your Schedule, to your battery as instructions, through your manufacturer's cloud, on your behalf.

Paused: Orza stops planning and sends nothing, and your battery follows its own settings.

If you choose Automatic control

By switching on Automatic control, or by agreeing to these terms on your Schedule, you authorise us to send instructions to your battery system through your manufacturer's API on your behalf while Automatic control is on, until you switch it off or remove the entries. We keep a record of when you agreed and to which version of these terms. In particular:

You confirm you may. You own the system or are authorised by its owner to let a third party control it, and you are responsible for checking that doing so is allowed under your manufacturer's warranty and terms and your energy supplier's tariff.

Your equipment stays your responsibility. Its installation, safety, maintenance, settings, firmware and warranty are matters between you, your installer and your manufacturer. Your battery's own firmware and battery management system apply their safety limits underneath anything Orza asks for, and we cannot override them.

Instructions can fail or be late. They pass through your manufacturer's cloud, which can be slow, unavailable or change without notice. An instruction may not arrive, may arrive late, or may be replaced by your manufacturer's app, your installer or the system itself. One already sent may stay in effect until something replaces it.

A plan is a forecast. It is made from prices, a weather forecast and your usage as they stood at the time. When the day turns out differently, a plan followed correctly can still cost more than doing nothing would have.

Keep an eye on it. Check that your battery is doing what you expect, especially at first, and switch back to Monitor only or Paused if it is not. We may pause Automatic control for your system, or for everyone, at any time and without notice, for example if we see it behaving unexpectedly.

We install nothing

There is no hardware, no hub and no software on your home network. If your manufacturer has no usable cloud API, we cannot reach your battery and we will tell you so.

We do not promise you will save money

Any figure we publish is evidence, not a forecast of your result. Where we quote a saving we say what it was measured on and what it was measured against. The up to £970 a year on our home page comes from backtests: whole-year runs on real households' metered use with a modelled roof and battery, and a year of one 27 kWh home's own readings, each against the same battery left to itself. How Orza is tested and the note at the foot of that page give the ranges, and the result varies by hundreds of pounds with the tariff alone. Your house, tariff, battery, roof and habits are all different.

It is not advice

Nothing in the product or on this site is financial advice, investment advice, or a recommendation about which electricity tariff or equipment to buy. We are not regulated to give any of those. Decisions about your tariff and your equipment are yours.

We do not promise the data is complete

We depend on your manufacturer's cloud, your supplier's API and a weather forecast, and any of them can be unavailable. When that happens the gap is shown as a gap: a half hour we could not read is marked missing and the day it belongs to is left out of your savings figure. We would rather show you a hole than fill it in.

We do not promise it will always be up

There is no uptime commitment during the beta. If Orza is unreachable your battery does not stop: in Monitor only and Assisted it simply carries on under its own settings, and in Automatic control it keeps the last instruction it was given, or its own settings, until something replaces it. That can cost more than the plan would have.

Accurate details

The plan is only as good as what you tell us about the house. If your battery capacity, tariff or export rate is wrong, the figures will be wrong, and that is not a fault in the service.

Your account

Keep your password to yourself and tell us if you think someone else has it. You are responsible for what is done through your account.

Fair use

Do not attempt to reach other people's data, break or overload the service, scrape it at volume, or use it to build a competing product from our data rather than your own. Do not connect a system you have no right to connect.

Who owns what

The software, the site and everything in them stay ours. Your data stays yours: connecting your system gives us permission to read it and to process it in order to provide the service, as set out in the privacy notice, and nothing more. If you send us feedback we may act on it without owing you anything for it.

Other people's services

We are independent of, and not endorsed by, any battery manufacturer or electricity supplier. Your agreements with them are unaffected by this one, and we are not responsible for what their services do, charge or change.

What that means in practice

Features will change and some will be withdrawn. Things will break. We may need to recompute history when we fix a bug in how a figure was scored, so a number you saw last week can legitimately change; when that happens it is because the old one was wrong.

Keep your own records if they matter

Do not rely on Orza as your only record of anything you need. We take reasonable care, but this is a beta and we do not offer a data retention guarantee during it.

What we do not limit

Nothing here excludes or limits our liability for death or personal injury caused by our negligence, for fraud, or for anything else that cannot lawfully be excluded. If you are a consumer, your statutory rights are not affected by anything in these terms.

The service is provided as it is

Orza is a free beta, provided as it is and as available, without any promise that it is fit for a particular purpose, accurate, complete or uninterrupted, to the extent the law allows.

What we are not liable for

To the extent the law allows, we are not liable for:

higher energy bills, lost savings, lost export income or lost profit; any instruction sent in Automatic control, or its result, where Orza followed its plan as designed; any failure, delay, outage or change in your manufacturer's cloud, API or firmware, or in your supplier's prices or tariff; the condition, installation, maintenance, settings, safety or warranty of your equipment, or anything done by your manufacturer, installer or supplier; decisions you took in reliance on a figure or plan we showed you; loss of data; or any indirect or consequential loss.

Our total liability

Where we are liable, our total liability to you under or in connection with these terms is limited to £100.

Law and courts

These terms are governed by the law of England and Wales, and its courts have jurisdiction. If you live elsewhere in the UK you keep the right to bring proceedings in your own courts.

You can leave whenever you like

Delete your account in the app. That removes your data as described in the privacy notice. You can also just disconnect your manufacturer account, which stops us reading or sending anything.

We can end the beta

We may suspend or close an account that breaks these terms, and we may end the beta itself. If we close the beta we will give reasonable notice and time to get your data out first, except where a serious breach or a legal obligation makes that impossible.

Changes to these terms

We will tell you about a change that matters rather than re-dating this page quietly, and you can leave if you do not accept it. Last updated: 2 November 2026.