Thứ Sáu, 29 tháng 5, 2020

A 17.5%-efficient dark grey solar tile

U.K. business Roof Tiles Technology Ltd has developed a solar tile with a claimed efficiency of 17.5% and power output of 175 W per square meter. The company’s founder, Antonio Lanzoni, said a PV system featuring the product would cost 25-30% more than a standard solar rooftop.

U.K.-based Roof Tiles Technology Ltd has developed a solar tile featuring monocrystalline Perc solar cells which it says resembles a standard concrete roof tile and is suitable for new and renovated roofs.

Roof Tiles Technology can offer potential partners production line equipment.

Image: Roof Tile Technology Ltd.

The flat, dark grey, BiSolar tile has a power output of 18 W and efficiency of 17.5%, according to the manufacturer. “For each square meter, 9.7 tiles are needed, with total output reaching 175 W,” company founder and co-director Antonio Lanzoni told pv magazine. “The solutions we came up with are patented and offer strong protection for the product.”

The device is made of a PV-etched glass panel attached to a concrete roof tile and features 22%-efficient solar cells from a Chinese producer which is “well established in Europe,” said Lanzoni. Each tile includes a dozen 139 by 52.92mm cells.

The product carries a 25-year performance guarantee, measures 445 x 330mm and weighs 6kg, with the PV device contributing 1.2kg and including 3mm of satin tempered glass. 

Price

According to Lanzoni, a BiSolar tile installation is 25-30% more expensive than a standard rooftop PV array. “But it looks a lot better,” said the company founder, who added, installation costs for BiSolar are cheaper than for rooftop panels. “The BiSolar tile can be installed by a standard roof installer like a normal roof tile, as they can be easily connected via simple MC4 connectors located under the solar panel,” said Lanzoni.

The company began marketing the product late last year but the Covid-19 crisis slowed operations in recent months. “However, we are now supplying to a selected number of potential partners the first pilot roofs in a few countries,” said Lanzoni.

Roof Tiles Technology wants to enter new markets and is said to be in talks with construction and roofing industry businesses about establishing production facilities outside the U.K. “Potential partners will benefit [from] the exclusive right to use our patent, an established supply chain and technical assistance, from the assembly process to roof installation,” Lanzoni added.

The founder of the business said BiSolar installations outperform roofs fitted with conventional tiles in the Wind Driven Rain test – which assesses the impact of rainfall on devices – and he said the product could in future become cheaper and offer better performance.

Manufacturing

Lanzoni said the product patent process was begun a year ago and first examination of the BiSolar tile has occurred. The patent requires the combination of PV with a concrete roof tile which does not alter the latter structure or enable water penetration. The product must also be a defined colour recognized for varnish, powder coating and plastics, with no blueing effect.

“PV panels are automatically glued to the roof tile surface in a very precise position defined by a robotic line,” said Lanzoni of the production process. “Seals are fixed on three sides of the PV panels.”

Roof Tiles Technology designed a production line with an annual capacity of 18 MW and Lanzoni said the fabrication equipment would be part of the package offered to partners who wish to manufacture BiSolar tiles.


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