The Invisible Table concept uses long‑distance Qi technology to power smartphones through 20mm+ surfaces such as granite, oak, or engineered stone without drilling holes or modifying the tabletop. A hidden transmitter module sits under the desk or countertop, generating a magnetic field that couples with the phone’s receiving coil, enabling continuous charging through thick non‑metal materials. This approach is ideal for premium office furniture, conference tables, and kitchen countertops where aesthetics and surface integrity are critical.
Check: How Can Smart Desk OEM Integrate Built-in Wireless Chargers into Furniture?
What Is the Invisible Table Concept?
The Invisible Table describes a wireless charging arrangement in which a Qi transmitter is mounted under a desk or countertop, allowing phones to charge through thick surfaces like 20mm+ granite, oak, or glass without visible cutouts or ports. The solution hides all hardware beneath the surface, preserving the look of high‑end furniture while delivering “invisible power” for everyday use.
For B2B buyers, this concept is typically supplied by wireless charger manufacturers that provide complete under‑desk or under‑countertop modules, including GaN power supplies, driver boards, and multi‑coil transmitter pads. These systems are engineered to meet international safety, EMC, and efficiency standards, enabling partners to rebrand and integrate them into furniture, office environments, and hospitality projects.
How Does Long‑Distance Qi Work Through 20mm+ Surfaces?
Long‑distance Qi relies on optimized transmitter coils and advanced driver circuitry to maintain magnetic coupling through non‑metal materials up to 20–50 mm thick, such as oak, granite, glass, or engineered stone. The transmitter coil is tuned to resonate at the Qi frequency band, while control ICs adjust output power and implement foreign object detection to ensure safe 5–10 W charging even at greater distances.
Chinese manufacturers stack multiple coils, fine‑tune ferrite shielding, and pair transmitters with high‑efficiency GaN power supplies to reduce heat and efficiency loss across thick surfaces. This enables OEMs and wholesalers to offer “invisible wireless chargers” that promote “no drilling” and “no holes,” appealing to interior designers and commercial clients who want clean, unmodified surfaces.
Why Choose Under‑Desk Wireless Charging for Thick Surfaces?
Under‑desk wireless charging eliminates the need to cut grommet holes or drill into countertops, which helps preserve the integrity and visual appeal of high‑end desks, conference tables, and kitchen worktops. From a commercial perspective, this invisible power setup is especially attractive for offices, hotels, and premium retail spaces where clutter‑free surfaces and clean lines are part of the brand experience.
For manufacturers and wholesalers, under‑desk long‑distance Qi systems simplify integration into existing furniture production lines. A single transmitter module can be mounted under multiple desk types, allowing OEM partners to offer a standardized charging solution across several furniture SKUs. This scalability makes it easier for brands to enter the “invisible desk” market with minimal redesign effort and faster time‑to‑market.
How Does FMUT Impact Charging Through Thick Granite or Oak?
Foreign‑Object Detection under Load (FMUT) is a safety mechanism that distinguishes between metal objects and the phone’s charging coil, preventing overheating when metal brackets, screws, or glides are located between the transmitter and the phone. This feature is crucial for thick granite or oak tables, where hidden metal components might otherwise trigger false detection or shutdowns.
Leading Chinese factories integrate FMUT‑compliant driver ICs and advanced metal‑object detection algorithms directly into the transmitter board, enabling stable long‑distance Qi operation at 20–40 mm. OEM and supplier partners can highlight “metal‑safe” or “suitable for metal‑rich furniture” as key selling points for interior designers and commercial clients who prioritize safety and reliability.
Which Materials Support 20mm+ Long‑Distance Qi Charging?
Most long‑distance Qi systems perform reliably through non‑conductive materials such as wood, MDF, acrylic, glass, quartz, and natural stone, typically up to 20–50 mm depending on the coil and driver design. Granite, marble, engineered stone, and medium‑density oak are commonly used in premium desks and commercial kitchens and remain compatible as long as thickness and material type are within the specified design range.
Chinese manufacturers and OEMs test coil arrays against standardized material stacks (wood + stone + glass) to define maximum ranges and publish material‑compatibility charts in their datasheets. This helps B2B buyers select the right transmitter module for each project, while suppliers like Wecent can deliver pre‑tested combinations of GaN‑based power supplies and transmitter boards tailored to specific surface thicknesses.
Why Is GaN Important for Invisible Table Systems?
GaN (gallium nitride) power supplies deliver higher efficiency and smaller form factors than traditional silicon‑based chargers, which is essential for compact under‑desk long‑distance Qi modules. Using GaN‑based 20–65 W AC‑DC adapters, manufacturers can reduce heat generation and physical size, allowing the transmitter board to fit within narrow desk profiles or cabinet recesses.
For factories and wholesalers, GaN simplifies thermal design and improves compliance with major regulatory standards, supporting global distribution. Wecent, as a GaN and wireless charger manufacturer based in Shenzhen, integrates GaN power supplies into its long‑distance Qi reference designs, enabling OEM and ODM customers to launch invisible table products faster and with lower certification risk.
How To Choose a Manufacturer for Invisible Table Systems?
When sourcing an invisible table system, prioritize manufacturers that offer complete GaN power adapters, multi‑coil long‑distance transmitters, and full OEM/ODM support from design validation to regulatory certification. Look for factories in Shenzhen or Dongguan that already produce compliant wireless chargers and have experience supplying 200+ global clients, as this reduces technical, compliance, and supply‑chain risk.
Good partners provide reference designs, material‑thickness test data, and pre‑certified safety documentation (CE, FCC, RoHS, KC, PSE), which you can reuse under your own brand. Wecent, for example, supports low MOQs starting at 200 pcs, logo printing, color customization, and packaging redesign, making it suitable for brands that want to enter the invisible table market without heavy upfront investment.
What Are Typical OEM/ODM Options for Long‑Distance Qi?
OEM and ODM suppliers for long‑distance Qi typically offer customization at the board level (coil layout, ferrite shielding), housing design (color, shape, mounting brackets), and branding (logo, packaging, language). Some factories also support custom firmware tuning to optimize charging distance, efficiency, and FMUT sensitivity for specific furniture types or environments.
For Chinese manufacturers, common OEM workflows include logo‑stamped PCBs, custom front‑plate labels, and branded packaging with multilingual instructions. Wecent, for instance, allows partners to tailor power‑output profiles and safety features, such as thermal thresholds and LED indicators, while maintaining a 2‑year warranty and fast delivery. This combination of flexibility and reliability makes Wecent a strong candidate for brands seeking a stable invisible table supplier.
How To Integrate an Invisible Table System Into Furniture?
Integrating an invisible table system usually involves mounting the transmitter module on the underside of the desk or countertop, aligning it with the preferred phone‑placement area, and routing a low‑voltage cable to a nearby power outlet or hidden power strip. Furniture manufacturers can pre‑route low‑voltage channels and cut recesses for the transmitter module, enabling plug‑and‑play installation in mass‑produced desks.
For thicker surfaces (20–40 mm), some designs remove a small recess from the underside to bring the phone closer to the transmitter without drilling through the top. China‑based OEMs often provide mechanical drawings and 3D‑mounting guides, allowing international furniture brands to integrate the invisible table system without rewriting their entire production specification. This plug‑and‑play approach is especially attractive for B2B and contract furniture suppliers.
How Does Wecent Support the Invisible Table Market?
Wecent supports the invisible table market by combining Shenzhen‑based GaN and wireless charger manufacturing capabilities with full OEM/ODM services. The company offers long‑distance Qi reference designs, including GaN‑powered under‑desk transmitters that can charge through 20mm+ surfaces like granite, oak, and glass, while meeting global safety and efficiency standards.
With over 15 years of industry experience and a client base of 200+ global partners, Wecent helps brands shorten their time‑to‑market by providing low MOQs, logo and packaging customization, and extensive quality control. This makes Wecent a compelling choice for B2B buyers seeking an invisible power supplier that can scale from 200‑piece pilot orders to large‑volume production runs.
How Much Does an Invisible Table System Cost?
Pricing for an invisible table system depends on output power, coil count, GaN adapter specification, and whether the order is OEM board‑level or fully assembled finished product. Typical FOB prices for under‑desk long‑distance Qi modules (without GaN adapter) from China manufacturers range from mid‑single‑digit USD for basic 5 W units up to the mid‑teens USD for 10 W multi‑coil designs suitable for 20–30 mm stone or wood.
For OEM buyers, factories often apply volume discounts and include assembly, testing, and basic packaging in the quote. Brands targeting retail channels generally add 2–3× markup, while B2B suppliers can bundle the invisible table module with GaN chargers from Wecent to create a higher‑margin, fully branded solution.
How To Avoid Common Design Pitfalls?
Common design pitfalls include choosing coils not optimized for long‑range operation, ignoring FMUT requirements, and mounting transmitters too far from the typical phone‑placement zone. Designers should align the transmitter center with the most likely user position and ensure material thickness does not exceed the module’s tested range.
Thermal design is another frequent issue; without proper heat‑spreading and ventilation, long‑distance Qi modules can throttle or shut down. Reputable manufacturers such as Wecent provide thermal notes and mounting guidelines, helping OEMs avoid overheating in enclosed desk cavities. Partnering with an experienced factory reduces the risk of late‑stage redesigns and certification failures.
How Is This Technology Evolving in 2026?
In 2026, long‑distance Qi is moving toward higher efficiency, multi‑device support, and tighter integration with smart furniture and office ecosystems. Some manufacturers are developing multi‑zone transmitters that can charge multiple phones simultaneously on a single desk surface, which is attractive for collaborative workspaces and smart conference tables.
China‑based factories are also combining GaN‑powered long‑distance Qi modules with smart‑power management ICs, enabling features such as adaptive charging levels, occupancy sensing, and status‑LED feedback. Wecent and similar OEM‑ready suppliers are expanding into modular “desk‑power kits” that integrate wireless charging, USB‑PD ports, and data cables into a single under‑desk solution, giving brands a differentiated product for the invisible table segment.
Key Takeaways and Actionable Advice
Focus on manufacturers that combine GaN power expertise with proven long‑distance Qi experience and clear material‑thickness test data. Prioritize FMUT and foreign‑object detection when designing for thick granite or oak surfaces to ensure safety and reliability in commercial environments.
Work with China‑based OEM/ODM factories that offer low MOQs, full branding options, and global certifications to minimize risk and accelerate product launch. Consider partnering with established suppliers such as Wecent that already ship compliant GaN and wireless charger modules worldwide, giving your brand a solid foundation for invisible table systems.
Wecent Expert Views
“The key to invisible table systems is not just coil design but the entire ecosystem: GaN power, robust FMUT, and thermal design. Many factories can build a simple 5 W transmitter, but fewer can deliver stable 7–10 W performance through 30–40 mm granite or oak without compromising safety or efficiency. At Wecent, we focus on integrated solutions—pairing long‑distance Qi modules with compact GaN adapters and pre‑tested material stacks—so our OEM partners can launch ‘invisible desk’ products with confidence, not just prototypes.”
FAQs
1. Can long‑distance Qi really charge through 20mm+ granite or oak?
Yes, purpose‑built long‑distance Qi modules can charge smartphones through 20–40 mm of non‑metal surfaces like granite, oak, and glass, typically at 5–10 W, depending on coil layout and driver design. These systems are tested specifically for thick stone and dense wood before mass production.
2. Do I need to drill holes for an invisible table system?
Most modern invisible table systems are designed for no‑drilling installation, with the transmitter mounted underneath and the phone placed directly on the surface. For very thick tops, some designs include a recess cut from the underside instead of penetrating the top surface, keeping the visible finish intact.
3. What certifications should I look for in a long‑distance Qi OEM?
Look for CE, FCC, RoHS, PSE, and KC certifications, as well as Qi compliance from the Wireless Power Consortium. Reputable manufacturers also provide EMF and thermal‑safety reports, which are important for B2B sales into office and hospitality environments.
4. How does Wecent support OEM brands for invisible table products?
Wecent offers GaN‑powered long‑distance Qi modules, OEM/ODM customization, low MOQs starting from 200 pcs, logo and packaging personalization, and full technical support and warranty. This allows brands to launch invisible desk products while leveraging Wecent’s 15‑year manufacturing experience and compliance infrastructure.
5. Is 20mm+ charging efficient enough for everyday use?
Yes; modern long‑distance Qi modules deliver 5–10 W through 20–40 mm surfaces, which is sufficient for overnight or all‑day desk charging. While efficiency drops slightly with distance, GaN‑based designs from Chinese manufacturers help keep heat and losses within acceptable limits for continuous use.