Photovoltaic cells embedded between the glass panes generate electricity while OKALUX capillary slabs in the cavity diffuse daylight without glare. SHGC .43 to .25, U-value .44, max panel 48 by 157 inches. The only OKALUX product where the building envelope is also energy infrastructure.
OKACELL embeds monocrystalline photovoltaic cells between the panes of an insulating glass unit and adds OKALUX capillary slabs in the cavity. The cells convert direct solar radiation to electricity. The capillary slabs diffuse the rest of the daylight evenly into the room. The result: sun protection, diffuse daylight, no glare, and a facade that generates power.
Standard 4x4 cell arrays of monocrystalline silicon are laminated between toughened glass panes. The cells generate electricity from direct solar radiation that would otherwise heat the building. Cell coverage is configured per project to balance daylight transmission, solar control, and energy yield.
Behind the photovoltaic layer, capillary slabs in the IGU cavity scatter the remaining daylight evenly into the room. This is the same OKALUX capillary core used across the family, proven daylight diffusion, no glare, no hot spots on the floor or ceiling, no operable shading required.
OKACELL is specified where the building envelope is expected to do more than enclose. LEED, BREEAM, and net-zero projects use OKACELL where the daylighting strategy and the energy-generation strategy can be the same envelope decision. The cells, the capillary slabs, and the IGU are factory-assembled as one sealed unit. No exterior maintenance for the life of the building.
The photovoltaic cells and capillary slabs are factory-set inside the sealed IGU cavity. Neither contacts outdoor air, humidity, or UV directly. No painting, coating, or replacement is required for the life of the unit, unlike rooftop or facade-mounted PV systems. Wiring connections at the panel edge integrate with standard low-voltage routing. The factory-sealed cavity functions as the argon or krypton fill chamber for thermal performance.
Daylight passes between the photovoltaic cells, through the capillary slab, and arrives in the room as soft, evenly-diffused illumination. The Hall of Flags at the Massachusetts State House uses OKACELL in the skylight running the length of the vault. State flags hang in the daylight, and the marble floor takes the sun without glare or hot spots, while the cells overhead generate power for the building.
OKACELL is configured per project. Cell density, capillary core finish, and IGU build-up are matched to daylight, solar, and energy-generation targets. The card below shows the standard 4x4 cell configuration.
OKACELL is specified where the building envelope is also energy infrastructure: civic buildings with sustainability mandates, educational and institutional projects pursuing LEED or net-zero, BIPV specifications where the architect wants the photovoltaic layer to be visibly architectural rather than appliance-mounted.
Civic and government buildings with sustainability mandates use OKACELL where the daylighting strategy and energy-generation strategy share the envelope. The Massachusetts State House Hall of Flags integrates OKACELL into a historic skylight: diffuse daylight to the marble floor, electricity from the cells overhead.
BIPV (building-integrated photovoltaic) specifications use OKACELL where the photovoltaic layer is intended to read as architectural cladding rather than a separate solar array. Peter Ferstl, Stadt Regensburg, integrates OKACELL into the upper facade band over a wood base, the photovoltaic surface visibly part of the building envelope.
Schools, universities, and institutional projects with energy targets use OKACELL clerestory glazing to generate power while delivering glare-free daylight to athletic, classroom, and assembly spaces. Direct solar gain is captured as electricity rather than heat.
Verified OKACELL installations across civic, educational, and BIPV typologies. Imagery via OKALUX product library and Glas Trosch deck reference.
Historic state capitol skylight retrofitted with OKACELL. Diffuse daylight reaches the marble floor without glare, while the photovoltaic cells generate electricity for the building. Boston, USA.
Civic building with OKACELL integrated into the upper facade band over a wood base. The photovoltaic surface reads as architectural cladding, visibly part of the envelope rather than a separate array.
School gymnasium with OKACELL clerestory band. The photovoltaic glazing delivers diffuse daylight to the court while generating electricity for the facility.
OKACELL is optimized for vertical façade and skylight applications. Sloped and overhead installations are supported with project-specific framing recommendations. The 1-inch IGU thickness fits standard curtainwall and storefront framing systems. Project-specific values for SHGC, Ug, and energy yield vary with cell density, capillary tube finish (T or W), and IGU build-up. Consult R. Suare for full specification.
Bilingual brochure and technical data for OKACELL photovoltaic glazing. Tender specification available on request via the contact form.
We'll send samples, energy-yield estimates, and a project-matched SHGC, Ug, and capillary core recommendation within two business days. For design-phase support, schedule a lunch and learn or send your daylighting and energy goals for review.
