Product Library / Smart Locks

eufy FamiLock S3 Max

Compiled by SmartHomeWorkflow Research · eufy · Smart Locks · ~$399.99 (at time of research, eufy's own product page structured data — $399.99 against SKU E85V0JY1, availability InStock. Never treated as a live price. ⚠ CORRECTED from $330, a $69.99 UNDERSTATEMENT, which is the direction that costs a reader more: someone budgeting from our page would have arrived $70 short. Read from the product's own schema.org Product block rather than the rendered page, because that page also prints $349.99, $299.99 and $599.98 for other eufy locks and bundles in its cross-sell.)

Compatibility

Protocols: WIFI · MATTER^[3][6][14]

What it can do^[10]

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality^[4]

✓ Works without a subscription: Yes.

Vendor account required: Not established — we have not sourced this yet.

Doorbell-cam recordings stay local — no cloud fee

Maintenance reality^[5]

• Batteries: 15000mAh rechargeable + 4xAAA backup — expect roughly 5 months per set
• Works without the internet: Not established — we have not sourced this yet. It does not mean the product fails without the internet.
• 15,000mAh rechargeable pack rated ~5 months (eufy); camera use drains it faster than a plain lock. Three dead-battery fallbacks: an exterior USB-C emergency-power port (hold a power bank to it), a physical key, and 4 built-in AAA cells that kick in for PIN-code-only access when the pack runs flat (other functions pause until you recharge).

Security updates^[11]

eufy publishes no security-update support date for this model. That is a gap in what the manufacturer has published, not evidence either way — some makers declare a support period and some say nothing at all.

VERIFIED ABSENCE, earned by walking all three source rungs rather than defaulted, and the walk was split across two runs: rungs (a) and (b) on the seventh grind, rung (c) here. (a) NO per-product regulatory declaration for any eufy model was found by two differently-constructed searches — the bar this catalogue requires before recording any negative — and eufy links none from its own compliance surface. (b) eufy's privacy-commitment page carries a Compliance and Certifications section that names "PSTI Compliance Attestation" and says it "demonstrates that eufy meets stringent cybersecurity requirements outlined in the Product Security and Telecommunications Infrastructure (Security Requirements for Relevant Connectable Products) Regulations 2023" — and it links no statement of compliance and names no support period, on a page that details ISO/IEC 27001, ISO/IEC 27701, ETSI EN 303 645, NISTIR 8425, CSA STAR and ioXt at length. (c) THIS product's own page carries no security-update, end-of-support or patching statement of any kind. ⚠ Said precisely, because the distinction matters: this records that eufy has published no support period we can find for this model. It is NOT a finding about eufy's compliance with any regulation, and nothing here asserts one. ⚠ And it has a shelf life. The UK PSTI regime requires manufacturers to publish a defined support period for products sold there, so vendor silence on this axis is the kind of fact that changes without notice — which is why this record carries a dated recheck rather than being treated as settled. ⚠ Worth stating on a LOCK specifically: this is the category where a maker's patching commitment matters most, and the absence is therefore the most consequential of the four in this batch. It is recorded as an absence, not as a risk — no unpatched vulnerability is known or implied.

The catch

Matter over Wi-Fi carries lock control only — the camera/doorbell half doesn't travel over Matter, so video keeps you in eufy's app whatever platform runs the lock.

Who it's for

Alexa/Google households that want lock + 2K doorbell cam in one device with 0.6s palm-vein unlock and no subscription.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

1. [1] eufy.com/products/e85v0jy1 (read 2026-08-09): five occurrences of 'Warranty' on the page, all inside the eufy Plus membership panel — 'Extra 6-Month Extended Warranty (Annual membership only)'. No base warranty term appears anywhere on the product page. — vendor-page research, verified 2026-08-09
   Backs: Service status
2. [2] eufy.com/products/e85v0jy1 (read 2026-08-09), schema.org Product block: name 'eufy FamiLock S3 Max', sku 'E85V0JY1', offer price 399.99 USD, availability schema.org/InStock. Visible page: 'eufy FamiLock S3 Max Palm Vein Unlocking Best Seller $399.99'. — vendor-page research, verified 2026-09-01
   Backs: Price
3. [3] csa-iot.org/csa_product/eufy-familock-s3-max/ (read 2026-08-09): certificate CSA2480FMAT44738-24, certified 12/30/2024, VID 0x1533, PID 0x000F, Transport Interface 'Wi-Fi, Bluetooth', firmware V1.0.1.0, hardware V4, primary device type 0x000A, specification version 1.2. Vendor side, eufy.com/familock-s3-max re-read the same day: 'Built-In Wi-Fi', 'Direct Wi-Fi', 'Matter support ensures cross-platform compatibility, while Matter over Wi-Fi provides faster, more reliable connections', ecosystem list 'Matter, Apple Home, Alexa, Google Home' — no Bluetooth mention on the page. — registry-lookup-and-vendor-research, verified 2026-08-09
   Backs: Protocols
4. [4] 2026-07 web research sweep (docs/02 catalog; primary sources cited there) — registry-and-press research, verified 2026-07-12
   Backs: Product identity, Price, Subscription, Market availability, Service status
5. [5] eufy.com/products/e85v0jy1 (15000mAh rechargeable + 4xAAA backup, rated 5 months; exterior emergency-power interface + physical key + AAA PIN-only fallback; official unlock methods 'Palm Vein, App, Voice Control, Password, Keys' — palm vein at 0.6s / 99.9%, NOT fingerprint) — vendor-page research, verified 2026-07-15
   Backs: Maintenance
6. [6] eufy.com/familock-s3-max ('Seamlessly integrates with Apple Home, Google Home, Alexa, and SmartThings… Matter over Wi-Fi') + eufy Smart Locks Matter Functionality FAQ (camera streams not supported over Matter) — vendor-page research, verified 2026-08-04
   Backs: SmartThings compatibility, Apple Home compatibility, Protocols, Amazon Alexa compatibility, Google Home compatibility
7. [7] Home Assistant official Matter integration docs (home-assistant.io/integrations/matter — locks supported, with lock-credential actions; Matter over Wi-Fi needs no Thread border router) + eufy.com/familock-s3-max ('Matter support ensures cross-platform compatibility, while Matter over Wi-Fi provides faster, more reliable connections' — eufy does not name Home Assistant; no single primary source names FamiLock + HA together, so this is a standards path with caveats, not a vendor-documented integration) + home-assistant.io/integrations/eufy (EufyHome: 'Light, Switch' only) — vendor-and-ecosystem-page research, verified 2026-07-21
   Backs: Home Assistant compatibility
8. [8] eufy.com product page (read 2026-08-09): schema.org Product 'eufy FamiLock S3 Max', SKU E85V0JY1, offer $399.99 USD, availability schema.org/InStock, badged 'Best Seller'. The page contains no 'Sold out' or 'Out of stock' string. — migrated hand stamp, verified 2026-09-01
   Backs: Market availability
9. [9] eufy.com, FamiLock S3 Max product page, re-read 2026-08-18 — 'Built-In Wi-Fi: Direct Wi-Fi'; 'Without Homebase™, it links to other eufy cameras, letting you remotely lock/unlock via live view on any device'. No statement about local unlocking, Bluetooth, or behaviour during an internet outage. — vendor-page research, verified 2026-08-18
10. [10] CSA-IoT certification CSA2480FMAT44738-24 for the eufy FamiLock S3 Max (primary device type 0x000A, specification version 1.2) and eufy.com's own FamiLock S3 Max product page — both already cited on this record — evidence read against sources this record already cites (BQ-187 capabilities population), verified 2026-08-19
    Backs: Capabilities
11. [11] eufy (Anker Innovations), eufy FamiLock S3 Max product page (eufy.com/products/e85v0jy1), read 2026-08-19 — no security-update, end-of-support or patching commitment appears anywhere on the page. Rung (b) read the same day at eufy.com/privacy-commitment, whose Compliance and Certifications section names a "PSTI Compliance Attestation" and links no statement of compliance and no support period. Rung (a): no per-product regulatory declaration located by two differently-constructed searches. — first-party read, three-rung absence walk (BQ-192 security-support sweep, decision 4), verified 2026-08-19
    Backs: Security-update support period
12. [12] eufy.com/products/e85v0jy1 (read 2026-08-19), verbatim: '2K HD night-vision camera, a 150° wide-angle video doorbell' · 'Camera streams are not supported via Matter due to current limitations. For full features and the best experience, please use the eufy App.' — vendor-page research, verified 2026-08-19
    Backs: Product identity, Apple Home compatibility, Amazon Alexa compatibility, Google Home compatibility, SmartThings compatibility
13. [13] The CSA certified-product record for the eufy FamiLock S3 Max, read 2026-08-20: certificate CSA2480FMAT44738-24, certified 12/30/2024 against Matter specification version 1.2, Transport Interface "Wi-Fi, Bluetooth", Primary Device Type ID 0x000A, VID 0x1533 / PID 0x000F. eufy.com is a registered refusing host, so no eufy control-story page could be read this pass. — vendor-page research (BQ-191 provider backfill, population (b): the `hubs` axis), verified 2026-08-20
    Backs: Required hub or bridge
14. [14] This record's existing per-model Matter evidence, re-read 2026-08-20 against the ruled definition of `protocols`: certificate CSA2480FMAT44738 · Matter over Wi-Fi. No new external source was fetched — the evidence already on this record was re-examined and this entry states what it establishes. — protocols-definition sweep (BQ-222 batch 2; ruling §1 of docs/decisions/2026-08-20-RULINGS-SITTING.md), verified 2026-08-20
    Backs: Protocols
15. [15] www.eufy.com/products/e85v0jy1 (read 2026-08-22, HTTP 200 via the SKU-code product handle this record already cites), verbatim from the product's own Specs block: 'Built-In Wi-Fi: Direct Wi-Fi' · 'eufy Ecosystem Support: Doorbell&Cam&Homebase™ 3' · 'External Ecosystem Support: Matter/Apple Home/Alexa/Google Home'. From the FAQ: 'Without Homebase™, it links to other eufy cameras, letting you remotely lock/unlock via live view on any device.' · 'It supports connection with Homebase™ 3 and is expected to be compatible with HB2 in Q2 of 2025.' · 'Camera streams are not supported via Matter due to current limitations. … Matter is now compatible with HomeBase™ 3 for simultaneous use. This video lock is not compatible with HomeBase™ 2.' From the page's own Products Comparison, the row that makes the answer model-scoped: this lock is 'Built-In Wi-Fi: Direct Wi-Fi' while the sibling Video Smart Lock S330 in the same table is 'Built-In Wi-Fi: Bridge with Chime (included)'. — vendor-page research (BQ-191 provider backfill, population (b): the `hubs` axis), verified 2026-09-01
    Backs: Required hub or bridge
16. [16] Record-keeping entry: the migrated research stamp was retired from this record on 2026-08-30 — internal, verified 2026-08-30
17. [17] eufy product page for the FamiLock S3 Max (www.eufy.com/products/e85v0jy1), read 2026-09-01. Specification table: 'Battery Type: 15000mAh+4*AAA' · 'Charger Requirement: 5V/2A'. FAQ 3, 'What is the power supply method of this door lock?': 'Our door lock uses a dual power supply with lithium and standard batteries. When the lithium battery is low, standard batteries provide emergency power, allowing PIN code access to lock/unlock, while other functions are unavailable.' — first-party rendered read (browser-render; BQ-197 helper) — the vendor publishes no working Shopify `<url>.js` route for this product (404 on 2026-09-01), so the structured-first rule of BQ-107 decision 2 has no route to take here; specification and FAQ regions only, no customer-review region consulted, verified 2026-09-01
    Backs: Power source
18. [18] eufy product page for the FamiLock S3 Max (www.eufy.com/products/e85v0jy1), re-read 2026-09-01: price $399.99 against a live 'Add to Cart'; specification table 'Battery Type: 15000mAh+4*AAA', 'Battery Life: 5 months', 'Built-In Wi-Fi: Direct Wi-Fi', 'eufy Ecosystem Support: Doorbell&Cam&Homebase™ 3', 'External Ecosystem Support: Matter/Apple Home/Alexa/Google Home'; FAQ 3 on the dual lithium-plus-AAA supply; and 'Matter is now compatible with HomeBase™ 3 for simultaneous use. This video lock is not compatible with HomeBase™ 2.' — first-party rendered read (browser-render; BQ-197 helper), verified 2026-09-01
    Backs: Research status
19. [19] CSA certified-product entry csa-iot.org/csa_product/eufy-familock-s3-max/, certificate CSA2480FMAT44738-24 (certified 12/30/2024), which prints VID 0x1533 and PID 0x000F. Read into this record on 2026-08-09 and again on 2026-08-20; this entry lifts the two identifiers out of that prose into their own typed fields. — BQ-189 identifier extraction from evidence this record already holds — no page fetched, verified 2026-09-02
    Backs: Certification and product IDs

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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