Low‑E Coated Solar Glass Breaks Barriers

ClearVue’s breakthrough lets solar glass wear a Low‑E coat like ordinary windows

ClearVue Technologies has become the first BIPV supplier to apply a soft low‑emissivity (Low‑E) metallic coating on the room‑facing side (surface 4) of its Gen 3 Vision Glass after the photovoltaic (PV) cells are already laminated. The magnetron sputter‑coating process works on the same production line used for conventional float glass, meaning architects can now specify energy‑generating glazing without redesigning façade systems. As ClearVue CEO Doug Hunt put it, “It removes a practical barrier for the industry – energy‑generating glass can be considered alongside conventional façade products.” The claim is corroborated by the company’s own announcement and by independent coverage that notes ClearVue is the only BIPV maker offering this capability on a double‑glazed unit, whereas rivals typically coat a third‑glass surface, sacrificing thermal performance.

Magnetron sputtering makes the Low‑E layer possible on finished solar glass

The coating is deposited by magnetron sputtering, a physical‑vapor‑deposition (PVD) technique that fires ions at a target metal (e.g., silver or titanium) to release atoms that settle on the glass surface as a thin, uniform film. This method is already the industry standard for high‑performance Low‑E windows because it delivers precise multilayer stacks that control solar heat gain while preserving visible light transmission. Continuous‑inline sputter lines can coat glass panels at full production speed, so ClearVue’s process can be slotted into existing float‑glass lines without slowing throughput.

The glass still produces power: >50 W per m² with 80 % light transmission

ClearVue reports that each square metre of its Gen 3 Vision Glass delivers more than 50 W of electrical power under standard test conditions while letting up to 80 % of visible light pass through. In practical terms, a 20 m² panel (roughly the size of a small office façade) would generate ≈1 kW peak. Using Israel’s typical central‑region yield of 1 700 kWh per kWp per year, that translates to ≈85 kWh per m² per year (0.05 kW × 1 700 kWh/kW ≈ 85 kWh). The high visible‑light transmittance keeps interior lighting levels comfortable, while the Low‑E layer cuts solar heat gain, reducing cooling loads.

Why the coating matters for commercial building projects worldwide

Commercial façades are already specified for Low‑E performance to meet energy‑code requirements. Until now, adding PV meant a separate triple‑glazed unit or an entirely new product line, increasing design complexity and cost. By coating the inner pane of a standard double‑glazed unit, ClearVue lets developers keep the familiar U‑value, SHGC, and visual aesthetics while harvesting electricity on‑site. This alignment with existing procurement and construction workflows is expected to accelerate BIPV adoption in office towers, shopping centres, and hospitals, especially in markets where façade performance is tightly regulated.

What it means for Israel’s rooftop and BIPV market

For an Israeli building in the central region, a typical 10 kWp ClearVue façade (≈200 m² of glass) would generate ≈17 000 kWh per year (10 kWp × 1 700 kWh/kWp). At the residential feed‑in tariff of ₪0.48 /kWh, that electricity is worth ≈₪8 160 annually. Using the country’s average residential installation cost of ₪3 150 per kWp, the upfront investment would be ≈₪31 500. Simple payback = 31 500 ÷ 8 160 ≈ 3.9 years, after which the system continues to produce clean power for the remainder of its 25‑year lifetime. Compared with a conventional rooftop PV system, the ClearVue façade also reduces cooling demand thanks to the Low‑E coating, further lowering operating costs – a double‑win that aligns with Israel’s 30 % renewable electricity target for 2030.

Industry context: BIPV is moving from niche to mainstream

ClearVue’s achievement follows a series of milestones for the company, including new international certifications for its Gen 3 glass and the addition of its ClearVue‑Helios rooftop panel to the Clean Energy Council’s approved‑product list. Globally, BIPV is gaining traction as building codes tighten and on‑site generation becomes more attractive. The ability to apply Low‑E coatings without a separate manufacturing step removes a key cost and supply‑chain hurdle, positioning ClearVue to capture a larger share of the commercial‑façade market.

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What you can do next – Use our solar ROI calculator to model a ClearVue façade on your own building, or explore the latest Israeli market data on BIPV installations.

Sources & further reading

• ClearVue Technologies Achieves Industry-First Surface 4 Low-E Coating on Gen 3 Vision Glass, Validated by AGC Interpane in Germany
• How Magnetron Sputtering Is Used in Low-E Glass Production – SIMVACO
• What is sputter coated glass: a technical guide – Precision Glasses
• New Developments for Highly Flexible In-line Sputter...