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Vietnam is one of the largest manufacturing and exporting hubs of garment and textile in the world. Many brands place their production base in Vietnam thanks to skilled labor force, low labor cost and high productivity as well as various local and international incentives for importing of materials and exporting to target markets. Factories in this sector normally have large buildings and roof space, operate with stable consumption pattern: 6 days per week, 2 or 3 shifts per day, main consumption in daytime. These characteristics provide optimal conditions for rooftop solar application, helping the manufacturers to reduce energy costs and carbon footprint, which is part of the sustainability goals set-forth by global fashion brands in recent years.

Laiyih II Hau Giang is a Vietnamese subsidiary of Laiyi Group from Taiwan and produces exclusively for Adidas. The factory in Hau Giang province has more than 35,000 m2 roof space and nearly 20,000 workers. The factory was interested in rooftop solar application to save energy cost and achieve renewable energy target required by Adidas. This is a key factor to ensure their business security in coming years. The installation of rooftop solar enhances their visibility in the sector and local community and attracts good labour force.

An 8 MWp rooftop solar system was installed at Laiyih II Hau Giang factory, by the same solar contractor who also built the 10 MWp system at their sister factory Ty Bach, employing German components, such as DC cable JJ-LAPP, mounting frame from Schletter. The estimated annual energy yield from this system is 12,134 MWh, equivalent to a reduction of 11,079 tons of CO2 per year. The PPA business model is applied in this project, 100% project value invested by the solar partner and the factory will enjoy lower electricity price in comparison to utility’s price during the period of 20 years.

German Contribution

JJ-LAPP cables and mounting structure from Schletter were selected to be the used this project to ensure high performance and reliable operation of the solar system.

Support of the German Energy Solutions Initiative

The Project Development Programme (PDP) of the German Energy Solutions Initiative supported Laiyih II Hau Giang with various awareness raising activities and project development, including knowledge on rooftop solar technology, advice on local regulations, pre-feasibility analysis of rooftop solar project, sharing contacts of German companies and advice on contract negotiation. Laiyih II Hau Giang subsequently was convinced to use German equipment thanks to proven quality in the global market.

System Data

Installed capacity:	8 MWp
Type:	Rooftop solar, on-grid
Yield:	Up to 12,134 MWh per year
Saved CO2 emissions:	Up to 11,079 tons/year
Location:	Hau Giang province, Vietnam
Client:	Laiyih II Hau Giang
In operation since:	December 2020
German business partner:	JJ-LAPP and Schletter
Number of solar panels:	19,300 (Canadian 415 Wp solar panel)
Number of inverters:	56 (Fimer PVS100 – former ABB)