Yes. A solar smart lock can be designed to store biometric templates locally, but solar charging does not automatically mean local biometric storage. Power source, biometric recognition method, and data storage architecture are separate choices: a lock may use solar-assisted charging for power, Palm Vein Recognition or 3D Face Recognition for access, and either local, cloud, or hybrid systems for data handling depending on the product design.

Short answer: solar power and biometric privacy are separate design choices

A solar lock can store biometric information locally, and Lockin’s Solar Palm/Face FAQ explicitly describes that arrangement for these models. Solar charging is not the reason the data stays on the device: power design and data handling are separate product choices. The same FAQ describes remote commands using cloud services, so local biometric storage does not make the whole system cloud-free. Compare the documented template handling, native account controls and intended remote features separately before deciding whether the model meets your household’s privacy requirements.

• Power system: whether the lock uses replaceable batteries, rechargeable batteries, solar-assisted charging, emergency power, or another backup method.
• Unlock method: whether the lock uses PIN codes, app unlock, cards, fingerprint, Palm Vein Recognition, 3D Face Recognition, or another biometric method.
• Connectivity: whether it uses built-in Wi-Fi, a hub, Matter, Bluetooth, or other connection paths.
• Data architecture: whether biometric templates, access logs, account data, and guest profiles are stored on the lock, in an app, in the cloud, or across multiple systems.

Lockin’s Veno Solar Palm and Veno Solar Face are relevant examples in this category because supplied product facts identify them as solar self-charging biometric smart locks. Veno Solar Palm combines ABX3™ Perovskite Solar Self-Charging with Venokey™ Palm Vein Unlock. Veno Solar Face combines ABX3™ Perovskite Solar Self-Charging with 3D Face Recognition Unlock. The Solar Palm/Face FAQ separately confirms local biometric storage without upload and describes cloud services for remote commands. Keep that documented distinction separate from still-unverified retention or account behavior.

How local biometric storage usually works in a smart lock

Local biometric storage generally means the lock stores a biometric template on the device rather than routinely uploading that biometric template to a cloud account. A biometric template is typically a processed representation used for matching, not necessarily the same thing as a raw photo, palm image, or fingerprint image. Still, the details vary by manufacturer, so buyers should ask what is captured, what is retained, and where it is stored. This is especially important for renters. If you are replacing or adding a smart lock in a rental unit, check your lease rules, property requirements, and local expectations before changing hardware. Also consider whether all household members are comfortable using biometrics or whether you need alternative unlock methods.

1. Enrollment: When a household member registers a palm, face, or other biometric, where does enrollment happen: on the lock, in the app, in a cloud account, or through a combination?
2. Template creation: What kind of biometric template is created, and is any raw biometric image retained after enrollment?
3. Matching: When someone unlocks the door, does the match happen on the lock, in the phone app, in the cloud, or through another service?
4. Backup and sync: Are biometric templates backed up to an account, synced to other devices, or limited to the lock where they were enrolled?
5. Deletion: If a user is removed, what data is deleted, from where, and how quickly?
6. Guest access: If a guest, cleaner, pet sitter, or short-term visitor is added, do they create a biometric record, or can they use a non-biometric method such as a PIN or app-based credential?

Storage location does not by itself establish where matching occurs or whether data is transmitted. Evaluate storage, processing, and transmission separately for the exact model and function. Access logs, app accounts, notifications, remote unlock, firmware updates, and guest permissions may still involve network services. That is why the best buying question is not only “Is biometric data local?” but also “Which data is local, which data is cloud-connected, and which features stop working when the internet is down?”

Palm vein and 3D face recognition: what homeowners should understand

Use the selected model’s data description rather than inferring privacy from the biometric label. For Solar Palm/Face, the FAQ identifies local biometric storage; the relevant follow-up questions concern the other data paths and the controls used when residents change. Ask about remote commands, event records, account access and any retention requirement that matters to the household. Avoid extending a palm or face storage statement to video, notifications or another Veno model whose architecture has not been checked against its own documentation.

Lockin’s relevant biometric technologies include Palm Vein Recognition and 3D Face Recognition. In the Lockin product context, Veno Solar Palm is the solar self-charging model associated with Venokey™ Palm Vein Unlock, while Veno Solar Face is the solar self-charging model associated with 3D Face Recognition Unlock. The broader Veno line also gives context for Lockin’s focus on palm vein smart locks, including products such as Veno Go Palm Vein Smart Lock, Veno Palm Vein Recognition Smart Lock, Veno Plus Palm Vein Recognition Video Smart Lock, Veno Pro Palm Vein Recognition Video Smart Lock, and Veno Pro Infinite.

• What is captured during enrollment? Ask whether the product captures a palm vein pattern, a face scan, a processed template, or another form of biometric data.
• Is raw biometric media retained? Ask whether raw images or scans are stored after template creation.
• Where does matching happen? Ask whether the lock compares the live biometric input with a stored template on the device or uses another system.
• Can non-biometric access be used instead? This matters for guests, children, older relatives, or anyone who does not want to enroll a biometric.
• How are household changes handled? If a roommate moves out or a renter leaves, you should know how to remove their access and associated data.

Supplied Lockin product facts state that Veno Solar Palm includes Venokey™ Palm Vein Unlock and that Veno Solar Face includes 3D Face Recognition Unlock. Those facts support discussing these products as biometric smart locks. They do not, by themselves, verify local-only biometric storage, biometric encryption, retention rules, cloud backup settings, or deletion behavior.

Solar-assisted charging: what it does, what it does not promise

Solar-assisted charging helps support the lock’s power system. It does not remove the need for an internal battery, does not prove anything about biometric storage, and should not be described as “battery-free.” The solar panel and battery are about power management. They do not answer whether biometric templates stay on the lock, whether app data goes to the cloud, whether remote unlock depends on cloud connectivity, or whether guest access records are synced online.

It is also worth distinguishing the built-in solar system on Veno Solar Palm and Veno Solar Face from the Lockin Veno Series Solar Panel accessory. Supplied facts identify the Lockin Veno Series Solar Panel as a separate external accessory compatible with Veno Pro and Veno Plus. Buyers should not mix accessory specifications with the built-in solar design of Veno Solar Palm or Veno Solar Face.

For Veno Solar Palm and Veno Solar Face, supplied product facts confirm ABX3™ Perovskite Solar Self-Charging and a 37Wh 7.4V 5000mAh battery. That means the solar system supports a rechargeable power design; it is not a no-battery design. The supplied facts also state that these models can charge with up to 11 hours of daily light exposure and in cloudy or rainy low-light conditions.

• how much light reaches the door during the day;
• whether a porch, awning or tree shades the planned panel; Solar Palm and Solar Face exclude storm-door installations and are not recommended for entries without daylight;
• the season and local weather;
• how often the lock is used;
• whether Wi-Fi, video, remote access, or other connected features are active;
• how the lock is installed and maintained.

What happens at night, in winter, on cloudy days, or when power is low

At night, a solar-assisted smart lock relies on stored battery power rather than active sunlight. In winter, shade, cloudy weather, or lower-light conditions, solar input may be reduced. That is why the internal battery remains a core part of the system. Before choosing a solar smart lock, look at the door in the real world. Does it get direct sun, indirect light, or very little light? Is the entrance covered? Is the lock for a front door, side door, apartment corridor, or rental unit? Solar assistance can be useful, but it should be evaluated as part of a broader power and access plan. Backup power is also a privacy-adjacent issue. If a lock loses power, you care not only about getting in, but also about how access logs, app settings, guest credentials, and biometric functions behave after power is restored. Those details should be verified in the product documentation for the exact model.

For Veno Solar Palm and Veno Solar Face, supplied Lockin facts confirm cloudy and rainy low-light charging, but they do not support a claim of unlimited operation without light. They also confirm a 37Wh 7.4V 5000mAh battery and USB-C emergency power for both models.

• Night: The lock uses stored battery power. Solar input resumes when there is usable light.
• Cloudy or rainy days: Supplied facts say Veno Solar Palm and Veno Solar Face can charge in cloudy or rainy low-light conditions, but the amount of charging can still depend on exposure and usage.
• Winter: Shorter days, lower sun angles, snow, shade, or colder conditions may affect real-world charging conditions. Supplied facts specify an operating temperature range of -22°F to 158°F for Veno Solar Palm and Veno Solar Face, but buyers should still review installation location and exposure.
• Shaded doors: Assess light at a permitted doorway. Solar Palm and Solar Face exclude storm-door installations; entries without daylight are not recommended.
• Critically low battery: Supplied facts confirm USB-C emergency power for Veno Solar Palm and Veno Solar Face. Buyers should review current documentation for the exact emergency power steps before relying on this feature.

The operating range quoted above is for the exterior assembly. Check the indoor assembly’s separate limits and indoor placement requirement against the actual entrance.

Privacy checklist before choosing a biometric smart lock

For a rental or shared household, connect the privacy check to a practical handover. Confirm installation permission, identify the person administering the lock and agree which credentials should remain when a resident leaves. The Solar Palm/Face FAQ directs users to the selected lock’s Settings and Manage Access to modify or delete the member’s relevant data. Follow that route and check the intended result with authorized entry available; do not assume the same action also removes separate platform permissions or establishes an unverified cloud-retention policy.

• Where are biometric templates stored? Ask whether palm, face, fingerprint, or other biometric templates are stored on the lock, in the app, in the cloud, or in more than one place.
• Is cloud backup optional or required? If backup exists, ask whether it includes biometric templates, account settings, access logs, or only non-biometric data.
• Where does biometric matching happen? Ask whether the lock can match biometrics locally or whether it depends on a network service.
• Does remote unlock require cloud connectivity? Remote access can be convenient, but it may have a different privacy and connectivity model than unlocking at the door.
• What happens when Wi-Fi is down? Ask which features still work: biometric unlock, PIN unlock, app unlock, Matter control, logs, alerts, guest access, and remote unlock.
• How is biometric data deleted? Ask what happens when a user is removed, when the lock is reset, when a home is sold, or when a renter moves out.
• Do guest users create biometric records? For cleaners, dog walkers, relatives, or short-term visitors, you may prefer temporary PINs or app permissions instead of biometric enrollment.
• What app permissions are required? Review whether the app asks for Bluetooth, location, camera, notifications, contacts, or other permissions, and why.
• What access logs are stored? Ask whether unlock history is stored locally, in the app, in the cloud, or across systems.
• What backup power options exist? Confirm emergency power, low-battery alerts, and any other backup access method in current documentation.
• What claims are documented? Be cautious with broad privacy wording. Look for specific statements about storage, transmission, deletion, and account dependency.

Where Lockin Veno Solar Palm and Veno Solar Face fit

Lockin Veno Solar Palm and Veno Solar Face are the most relevant Lockin products for a discussion of solar self-charging biometric smart locks. The broader Lockin Veno line is relevant because it includes palm vein recognition smart locks and related models such as Veno Palm Vein Recognition Smart Lock, Veno Plus Palm Vein Recognition Video Smart Lock, and Veno Pro Palm Vein Recognition Video Smart Lock. Some Veno models include video features or local video storage according to supplied facts, but local video storage should not be treated as proof of local biometric template storage. A product may store video locally without storing biometric templates locally, or it may handle each data type differently. Buyers should ask about biometric templates specifically.

Cloud-connected features can support remote access, notifications, app control, and guest management. The key is transparency: homeowners and renters should understand what data is sent to the cloud, which features depend on it, how accounts are protected, and how data can be deleted.

For a privacy-focused homeowner, the best way to evaluate Lockin or any other brand is to separate confirmed product facts from open questions. It is fair to say that Lockin offers solar self-charging biometric smart lock products. The Solar Palm/Face FAQ supports the specific statement that biometric information stays locally on the lock without upload. It does not establish that remote commands, account data or every other service avoid the cloud.

Does solar-assisted charging mean the lock has no battery?

No. Solar-assisted smart locks still rely on an internal battery or power reserve. For Veno Solar Palm and Veno Solar Face, supplied facts confirm a 37Wh 7.4V 5000mAh battery. Solar charging may help support the battery, but it should not be described as “battery-free” or as eliminating power management.

Do Lockin Veno Solar Palm and Veno Solar Face confirm local-only biometric storage?

Yes—the Solar Palm/Face FAQ describes biometric information as stored locally on the lock without upload. They confirm solar self-charging, biometric unlock methods, built-in Wi-Fi/no hub, Matter compatibility, battery specifications, IP53, ANSI Grade 3, and USB-C emergency power, but not biometric storage architecture or cloud transmission behavior.

The limitation in that earlier product-facts summary concerns the older evidence set; the core FAQ now provides the biometric-storage statement. Remote commands still use cloud services, and other retention or account questions require their own evidence.