Heliene, Caeulux Unveil 27% Efficient Solar Module

The Hybrid-Tandem module pairs perovskite and silicon layers in a design built for production at Heliene's Minnesota facility.

Updated on Nov. 15, 2026 in Energy

Clean vector editorial illustration of two stacked layers, a coral glass panel above a teal crystalline cell layer, centered in generous negative space, suggesting a layered solar module. — Heliene and Caeulux unveiled a hybrid-tandem solar module reaching up to 27% efficiency, with commercial production now underway at Heliene's Minnesota facility. AI Illustration. Upload story photo >

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Heliene and Caeulux announced a Hybrid-Tandem solar module that combines perovskite and silicon layers, reaching conversion efficiencies of up to 27%. Commercial-scale production has commenced at Heliene's Minnesota manufacturing facility.

Why it matters

The module integrates Caeulux's perovskite-based Energy Producing Glass with Heliene's N-type silicon cells, with Caeulux's contribution boosting efficiency by approximately 20% compared to silicon alone. Both companies maintain US-based supply chains, a factor relevant to domestic solar manufacturing across the United States.

Caeulux's perovskite contribution lifts module conversion efficiency to as much as 27%, roughly 20% above silicon alone, versus about 3% for the first perovskite demonstrations in 2009. Independent verification of these manufacturer-reported figures has not been described, and the product's long-term durability is not addressed.

The players

Heliene

Heliene is a solar module manufacturer backed by Corning that produces modules at its Minnesota facility.

Caeulux

Caeulux is a startup focused on perovskite solar cell technology, including its Energy Producing Glass product.

The details

Heliene, a company backed by Corning, is pairing its N-type silicon solar cells with Caeulux's Energy Producing Glass, a perovskite-based technology, to create two separate power-generating layers that operate in tandem. The module is designed to fit into Heliene's existing production infrastructure, and Caeulux's startup technology is positioned as a path to higher efficiency without a wholesale change to manufacturing.

2009: Initial perovskite demonstrations reached approximately 3% efficiency.
November 10, 2026: Heliene and Caeulux announced the Hybrid-Tandem module.
2027: Customer deliveries of the module are anticipated.

The Tech Race

The module extends perovskite efficiency from roughly 3% in 2009 to as much as 27% in a commercial product, showing how the technology has advanced from laboratory demonstration toward manufacturing. Placing perovskite layers over silicon targets a higher ceiling than silicon alone while keeping production inside existing lines.

Higher-efficiency modules could mean more electricity generated from the same rooftop or land area, which matters for homeowners and developers weighing solar installations. Customer deliveries are anticipated for 2027, so buyers evaluating solar purchases in the near term will not have access to the product yet.

The takeaway

Efficiency gains from pairing perovskite with silicon suggest that solar output per unit of area may keep rising without abandoning existing manufacturing. Readers planning future solar installations should watch for independent performance verification before relying on headline efficiency figures.