Privacy Policy

Effective date: 19 October 2026

Last updated: 19 October 2026

1. Who we are

Home 1st Group Ltd (company number 15503200), trading as Battery 1st, of 74 Woodside Green, London SE25 5EU, is responsible for the personal data described in this Privacy Policy.

Battery 1st provides residential battery storage and associated home energy services. It uses Home 1st OS technology that may also support Guardian 1st services.

2. Information we collect

Depending on the service used, we may collect:

- Identity and contact information.

- Property and installation information.

- Quotations, orders, payment records and customer-service correspondence.

- Account credentials, preferences and permissions.

- Equipment identifiers, battery status, system diagnostics and installation/commissioning records.

- Energy data, such as charging, discharge, consumption, generation or import/export information where available from connected equipment.

- Tariff and optimisation settings where needed for the services selected.

- Information about optional export, optimisation or grid-service participation where applicable.

- Technical, usage, security and diagnostic information from our website, app or platform.

- Marketing preferences and communications records.

- We collect only the information relevant to the purposes for which it is used.

3. How we collect information

We collect information directly from customers — including through the contact forms, appointment-booking tools and chat widget on our website, where the information you provide is used to handle your enquiry — through quotations and installations, from the equipment and systems they connect, through Home 1st OS, and from relevant installers, software providers or other service providers.

The information available depends on the equipment, integrations, permissions and services actually enabled.

4. How we use personal data

We use personal data to:

- Respond to enquiries and prepare quotations.

- Assess property and installation requirements.

- Supply, install, commission and support agreed equipment and services.

- Operate customer accounts and the Home 1st OS platform.

- Monitor equipment status, investigate faults and provide support.

- Deliver optional energy-management, optimisation, export or grid-service functions where the customer has selected and is eligible for them.

- Maintain security, prevent misuse and improve service reliability.

- Send service and contractual communications.

- Send marketing where permitted by law.

- Meet legal, regulatory, accounting and dispute-resolution requirements.

Our lawful bases, purpose by purpose: enquiries and quotations — taking steps at your request before entering a contract, and our legitimate interests in handling enquiries effectively; supplying, installing, commissioning and supporting your equipment and services — performance of a contract, and legal obligations where applicable; operating accounts and Home 1st OS — performance of a contract, and our legitimate interests in platform security and reliability; connected energy and automated battery control — performance of a contract; service improvement and security — our legitimate interests in reliable, secure services; service and contractual communications — performance of a contract; marketing — your consent for electronic marketing, and our legitimate interests otherwise within the law; record-keeping, accounting and dispute resolution — legal obligations.

We do not assume that consent is required or appropriate for every processing activity. The lawful basis must match the actual purpose.

5. Connected energy and automated battery control

Where a customer enables connected energy functions, the system may process equipment status, energy readings, tariff information, settings and other relevant data to provide the selected service.

If automated battery control is enabled, information may be used to determine or apply charging and discharge actions within the configured service and equipment capabilities.

Actual operation depends on the installed equipment, system settings, tariff or energy-provider information, connectivity and applicable technical restrictions.

Most automated charging and discharge actions are routine service operations whose effects relate to how your equipment uses electricity. Where a feature could involve automated decision-making or profiling with legal or similarly significant effects, we will provide additional information at the relevant point, assessing each feature according to its actual effects.

Export, rewards, optimisation and grid-service features are only available where the customer and equipment meet the applicable requirements and the necessary arrangements have been made. Any additional terms, eligibility conditions or permissions will be provided through the relevant service process.

6. Who receives personal data

Depending on the service, data may be accessed by relevant Battery 1st staff and contractors, installation and maintenance providers, hosting and software providers, customer-support providers, equipment or integration providers, payment processors, relevant energy or tariff service providers, professional advisers and public authorities where legally required.

We limit access to what is needed for the relevant purpose and apply appropriate safeguards.

7. Sharing across Battery 1st and Guardian 1st

Battery 1st and Guardian 1st are trading names of the same company and use shared Home 1st OS technology. This does not mean all staff have access to all customer records.

Some information, such as identity, contact and account details, may be used across the services where necessary for account administration, customer support, platform security or another identified and lawful purpose.

Battery and energy-use information is not automatically available to Guardian 1st personnel simply because the same platform is used. Guardian safety and security information is not automatically available to Battery 1st personnel for energy-service purposes.

Access must be limited according to role, service, purpose and legitimate need.

8. International transfers

Where a service provider processes personal data outside the United Kingdom, we will use a lawful transfer mechanism and appropriate safeguards where required by law.

Further information about applicable transfers and safeguards can be requested using our published privacy contact details.

9. Retention

We retain personal data for as long as reasonably necessary for the purposes described in this notice, taking account of contractual, technical, accounting, warranty, security, legal and dispute-resolution requirements.

Customer and contractual records may need to be retained longer than routine technical logs. Equipment and energy data may have different retention periods depending on the service and its purpose.

When information is no longer reasonably required, we delete or anonymise it, subject to lawful retention obligations.

10. Your rights

Subject to applicable law, you may have rights to access, correct, erase or restrict personal data, object to certain processing, request transfer of certain data, withdraw consent where processing is based on consent, and object to direct marketing.

We may need to verify your identity before responding. These rights are subject to legal conditions and exceptions.

11. Complaints

Please contact us first if you have a concern about how we handle personal data.

You may also complain to the Information Commissioner's Office: https://ico.org.uk/

12. Cookies and similar technologies

Our Battery 1st Cookie Policy explains the use of cookies and similar technologies on our website and, where applicable, our digital services.

13. Security

We use appropriate technical and organisational measures to protect personal data against unauthorised access, loss, misuse, alteration or disclosure.

No connected system can be guaranteed to be completely secure. Customers should protect account credentials and promptly report suspected compromise.

14. Changes and contact

We may update this notice when our services, systems or legal obligations change. The current version will be published on the Battery 1st website.

For privacy requests, contact our privacy team at [email protected], or write to us at our registered office.