Update Date: 20 Nov, 2025
Effective Date: 20 Nov, 2025
Deye has developed this Privacy Policy to explain how we may collect, retain, process, share and transfer
your personal information when you use our following services as a registered user (Each a “User” and
referred to together in this Policy as, the “Users”, “you” or “your”). Deye ESS Mobile Application and Web
Application (“Deye ESS Services”), as defined in Deye ESS Terms and Conditions, are provided by
Cuiji Technology(Shanghai) Co., Ltd., a company incorporated in People's Republic of China (referred to in this Policy as “Deye”, “we”, “us” or
“our”). Cuiji acts s as the “Data Controller” of your personal information under General Data Protection Regulation (the “GDPR”) and other applicable law
for the activities described in this Policy.
1. Information We Collect
We collect, process and use personal information from and about you, including when you create an account
and interact with us to make use of our Cloud Services.
We collect the following certain necessary information from Users:
1.1 Information you provide us
To use Deye ESS Service and Products, you need to have an account, and to create an account, you need to
provide us the necessary information.
●Personal Account. If you create an account, you should provide us the necessary information so that we could provide the
services to you. This includes your username, your email address or your mobile phone number; your password;
your display language; and third-party single sign-in information (if you choose this sign-in method). If
you do not provide the necessary account information to us, you should not be able to use our Deye ESS
Services. In addition to the necessary account information, you can also provide the avatar and nickname
associated with your account, that is optional and can be customized based on your preferences and
needs.
●Photovoltaic (PV) Plant Information. In order to use the PV plant management and monitoring service of Deye ESS Services, you will need to
provide us the Plant Name, Region, Address, Plant GPS Coordinates, Serial Number of Logger Device and Serial
Number of sub-devices including Inverter and Meters.
●Customer Service Information. In order to inquire about our Services or file a complaint, you will need to provide your contact
information, including email address or mobile phone number, and the detailed information regarding your
inquiry or complaint. If you do not provide the necessary contact information, we may not respond and
provide you with appropriate feedback.
1.2 Information we collect when you use our Services
When you use our services, we collect the information about how you use our services and what data the PV
Plant generated.
●Device Information. We collect information about and from the devices you use to access Deye ESS Services, that includes: (1)
Information about your devices, such as device model, operation system, browser information, Unique Device
Identifier (a string that the manufacturer assigns to your device to uniquely identify the device), and
other information about your device. (2) Information about your connection to Deye ESS Service, such as your
IP address, network connection status and type, network condition， the name (SSID) and hardware identifier
(BSSID) of the Wi-Fi network and related information.
●PV Plant Data. We collect PV Plant data in order to allow you to manage and monitor the PV Plant. The PV Plant data
includes Serial Number of data logger devices and sub-devices (such as inverters, meters and other similar
devices), and their continuous device data flow. We may use the PV Plant data to analyze and diagnose the PV
Plant situation in order to help you to maintain and improve the plant.
●Log Information. When you use Deye ESS Services, we collect the operation logs, service logs, service failure information
and other activity logs, even if you have not created an account or are signed out, that includes: IP
address and related information; device IDs and operation system information; browser information; pages
visited; and identifiers associated with cookies. We also collect the Mobile/Web application performance
data, crash data and the source of Mobile Application in order to ensure the information security and
improve the system performance.
●Customer Service Information. In order to inquire about our Services or file a complaint, you will need to provide your contact
information, including email address or mobile phone number, and the detailed information regarding your
inquiry or complaint. If you do not provide the necessary contact information, we may not respond and provide
you with appropriate feedback.
Within our Customer Service section, we may use large language model (LLM) to provide responses to basic
inquiries. We will clearly inform you when you are interacting with the LLM. If you would prefer not to
interact with the LLM, you may switch directly to human-assisted support.
●Cookies and similar technologies. We use cookies and similar technology to operate our services, discover how users use our services and
improve the service performance. Cookies and similar technology could help you to keep login to Deye ESS
Services and protect your account security, and help us to improve and understand how users use our services
in order to improve the user experience. You can manage or delete the cookies according to your preferences
by browser settings or mobile phone system settings. For additional information, you can find in our Cookies
Policy.
●Interactions with third-parties. When you authorize the Maintenance Service Provider to access, manage and monitor your PV Plant, we collect
the interaction information in order to provide Maintenance Service Provider with the necessary data to
fulfil their obligations.
1.3 Information we receive from third parties
We may receive information about you from third-parties whom are authorized by you to provide your PV Plant
information to us on behalf of you. These third-parties include your Maintenance Service Provider, Plant
System integrator, Equipment Dealer and other agents you designated. We may also receive information about
you from our Users, Partners and corporate affiliates who could help us to evaluate the security and quality
of Deye ESS Services.
2. How We Use the Information
2.1 Operate and improve our services
We use the information we collect to provide you the Deye ESS Services. In order to use our Deye ESS
Services, you should create an account and provide the Personal Account information. In order to use the PV
Plant management and monitoring services of Deye ESS Services, you should create a PV Plant instance and
provide the necessary PV Plant Information. We use your device information and cookies information to
provide you the better user experience when you use mobile or web application to access our Deye ESS
Services.
2.2 Ensure security
We use information we collect to ensure the security of our users, services, and your account. This
includes verifying your identity, ensuring secure login, preventing unauthorized use, and detecting illegal
activities. In the event of a security incident, we may utilize your information to assess the situation and
conduct thorough investigations.
2.3 Analyze and improve inverter and other devices
We use information we collect to measure and analyze data generated by inverter and other devices to
diagnose the related device situation. We will alert when there are unusual and error device situation, so
that you could assess and investigate your PV Plant.
We also use PV Plant data we collect to help us and our partners to improve the design and implementation
of devices. When we conduct the research and development to improve the inverter and other devices, we use
the anonymized plant and device data.
2.4 Communicate with you about our services
We use information we collect to communicate with you about Deye ESS Services, including our service
updates, term of service updates, privacy policy updates, and other inverter modular and firmware updates.
We may also send you the marketing message about our service update.
2.5 Research
We use the information you provide to us including survey, service testing and troubleshooting information
that could help us to improve the Deye ESS Service.
3. What is Purpose and Legal Basis
The purposes and legal basis upon which we process your personal information include:
|
Processing Purpose |
Personal Data |
Lawful basis of Processing |
|
Operate our services and Ensure safety and security. |
All personal information listed in “1. Information We Collect”. |
Contractual necessity, Your Consent and Legitimate interests |
|
Analyze and improve the Inverter and other devices, in order to diagnose the issues and improve
device design. |
PV Plant Data |
Contractual necessity and Legitimate interests |
|
Communicate with you about our services |
Personal Account, PV Plant Information, PV Plant Data, Interactions with third-parties and Customer
Service Information. |
Contractual necessity |
|
Research and make your experience of our Services and Products more efficient and effective. |
PV Plant Information, PV Plant Data, Device Information, Log information and Cookies and similar
technologies |
Legitimate interests |
We may process your personal information based on our legitimate interests, but we will always carefully
consider your rights and interests. We will not proceed with such processing if we believe that your
interests or fundamental rights and freedoms related to your personal information would be prejudiced.
You have the right to object to the processing of your personal information when it is carried out for our
legitimate interests. If you object, we will assess the situation and cease processing your personal
information unless there are compelling legitimate grounds that override your rights.
4. How We Share Information
4.1 Share upon your decision
You can share your Personal Account information, PV Plant Information and PV Plant Data with your
designated Maintenance Service Provider, in order to authorize the Maintenance Service Provider to help you
manage and monitor your PV Plant.
4.2 Share with third parties
We may share your information with our service providers that perform functions and provide services on our
behalf, including Amazon Web Services who provide the infrastructure cloud service to us. Before engaging
third parties to assist us in performing functions and providing services, we have established
pre-assessment procedures to verify the quality and suitability of these third parties. We carefully
evaluate their data protection practices and compliance with applicable privacy laws.
4.3 Integrations with third-party
We integrate third-party Software Development Kit (SDK) in our mobile application to enhance the
functionality, provide the better experiences and collect analytics data.
These third-party SDK service providers act as the data controller or data processor in the respective
scenarios:
|
SDK and Service Provider |
Data Processing |
Purpose and Privacy Policy |
|
Sentry SDK
Functional Software Inc
|
AndroidID, Get device sensor, listening sensor, IMEI, device MAC address, software installation
list，contacts and SMS
|
Bugs occur during user usage
|
|
MapBox SDK |
Geographic location Such as latitude and longitude, altitude, horizontal and vertical accuracy
(the session ID association is broken within 24 hours.) |
When the user edits，create，view the plant location |
4.4 When required by law
We may preserve, use, disclose, or share your information if we believe it is reasonably necessary
to:
comply with applicable law, protect the safety and integrity of our Services, protect your and our rights
or property.
4.5 With our Affiliates
We may share information amongst our affiliates to provide our services.
5. How and How Long We Store Information
Your personal information is stored within European Economic Area (EEA) in principle. We comply with all
applicable legal requirements to safeguard your personal data transferred outside the EEA. If we share data
with our affiliates and our service providers outside of EEA on behalf of us, we enter inter into
EU-Commission approved standard contractual clauses (SCCs) to ensure that equivalent level of data
protection applies to your personal information.
We will only retain your personal information for as long as reasonably necessary to fulfil the purposes we
collected it for, including for the purposes of satisfying any legal, regulatory, accounting or reporting
requirements.
●We retain your account information and other information for the duration of your account until you
choose to deregister or until your account is terminated for any other reasons.
●We may retain certain information for longer periods than stated in our policies to comply with
legal requirements and ensure safety and security.
●Once the specified retention periods expire, we will delete or anonymize your personal information,
unless otherwise mandated by laws and regulations.
6. Security Measures and Device Permissions
We recognize the importance of protecting and managing your personal information and take all necessary
steps to safeguard your personal information. We use a variety of security, organizational and technical
measures designed to help protect your personal information from unauthorized access, use, disclosure,
alteration or destruction consistent with applicable data protection and privacy laws and regulations.
However, you are also responsible for maintaining the security of your account for the Deye ESS Service in
your possession or control. We recommend that you do not divulge your password to anyone. Our staff will
never ask you for your password in an unsolicited phone call or in an unsolicited email. If you share a
computer with others, you should not choose to save your account information on that shared computer.
When you use our mobile application of Deye ESS Services, we may need to activate some device permissions,
including Storage/Photo, Camera, Location, Bluetooth and WIFI.
|
Device Permission |
Purpose |
|
STORAGE/PHOTO |
Used to set the cover of the PV plant and set the personal avatar. |
|
CAMERA |
Used to set the cover of the PV plant, set the personal avatar, scan the device SN |
|
LOCATION |
Used to set the PV plant location, device distribution network, device local mode |
|
BLUETOOTH |
Used to set the device distribution network, device local mode |
|
WIFI |
Used to set the device distribution network, device local mode |
|
MICROPHONE |
Used to enable microphone access, send voice messages |
You have the option to disable these permissions within the mobile application's System Settings or the
device's Settings, thereby preventing us from collecting the corresponding personal information. Please note
that the process for displaying and disabling permissions may vary depending on your specific device. We
recommend referring to your device's system description or instructions for guidance on managing
permissions.
7. Your Rights and Options
You have the following data subject rights and options regarding your personal data:
●Right to Access: You have the right to request a copy of your personal information. We will need to verify your identity
before taking any action.
●Right to Rectification: If the personal information we hold is incorrect, you have the right to request its amendment.
●Right to Erasure: You have the right to request the deletion of your personal information that we hold. However, there may be
legal and regulatory reasons that prevent us from deleting your data.
●Right to Withdraw Consent: You can withdraw your consent to the processing of your personal information at any time (if we process
your personal information based on your consent). Please note that withdrawing consent may impact our
ability to provide certain services to you, but it does not affect the lawfulness of our processing prior to
the withdrawal.
●Right to Data Portability: You have the right to receive certain personal information you have provided to us in a machine-readable
format, or to have it transmitted to a third party with your explicit authorization.
●Right to Restrict Processing: Under certain conditions listed in our policies, you can restrict the processing of your personal
information.
●Right to Object: You have the right to object, on grounds relating to your particular situation, at any time to processing
of Personal Data concerning you which is based on a task carried out in the public interest or on a
legitimate interest.
●Right to Lodge a Complaint: If your privacy rights are violated or you have suffered as a result of unlawful processing of your
personal information, you have the right to lodge a complaint with the relevant supervisory authority.
To exercise your rights, we may need to request specific information to confirm your identity and ensure
your right to access your personal information or exercise any other rights. This is a security measure to
protect your information. We may also contact you for further details related to your request. To exercise
your rights, please contact us using the details provided in the "Contact Us" section below. Please note
that we may need to verify your identity before proceeding with your request. We aim to respond to your
request within 30 days, and if more time is required, we will inform you and keep you updated.
8. Children Policy
Our Deye ESS Services are not directed towards children under 18 years old.
Cuiji does not knowingly collect personal information from children under 18. If you are under 18, please do not
use our Deye ESS Services, or submit any personal information to us.
9. Policy Update
We reserve the right to change, amend, or revise this Privacy Policy periodically. We will make efforts to
notify you of any significant or material changes. You can access the latest version of this Privacy Policy
on our website and mobile application at any time. We encourage you to regularly review the Privacy Policy
to stay informed about any updates before using the Cloud Services mentioned in this Policy.
If you do not agree with any of the changes and no longer wish to use our Services, you have the option to
close your Account. By continuing to use our Services after receiving notice of changes or when changes are
published on our Services, you indicate your acceptance of the changes and consent to the modified version
of this Privacy Policy.
10. Contact Us
If you have questions or requests about the privacy issues relating to the processing of your personal
information, you can contact the privacy office of your Data Controller, Cuiji Technology(Shanghai) Co.,
Ltd.:
<Data Controller>
Cuiji Technology(Shanghai) Co., Ltd
Attn: Data Protection Officer (DPO)
Email: PrivacyProtection@deye.com.cn
Address: No.9, Lane280, LinHongRoad, Changning District, ShangHai City, China
If you are in EEA, you may contact our Data Protection Officer, our EU representative below or you may
lodge a complaint with a supervisory authority in the EEA.
<EU Representative>
Deye Neue Energie GmbH
Attn: DEYE EU Representative
Email: PrivacyProtection@deye.com.cn
Address: Franz-Rücker-Allee 19-21, 60487 Frankfurt am Main
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