Established in 2009 to branch out its business based on the house building know-how, the unit takes four environment and energy solution approaches; “Energy Saving, ” “ Energy Creat ing, ” “Energy Reserving,” and “Building Renovation”. As “Energy Creating” approach, they undertake the construction and maintenance of PV power generation systems and mega solar for industrial use including factories, warehouses and stores. In 2015, the group’s total annual capacity with affiliate companies combined reached 700MW.
Since 2010, Huawei has been introducing Power Conditioning System (PCS) for large-scale PV Power Generation Systems into the global market. Converting direct current (DC) generated by solar panels into alternating current (AC), a PCS plays an important part in determining the efficiency of power generation of the entire system. When developing a product, Huawei applied the power supply technologies designed for telecommunication networks and added 10.5GW of capacity in 2015. Its market share is growing. In Japan, the company made its way into the market in 2014 and has greatly increased the number of shipments since last year. In this issue of HuaWave, we sat down with Mr. Shoichi Sakae, Director of Environment and Energy Business Unit, Tokyo Head Office, Daiwa House Industry Co., Ltd. who has adopted Huawei PCS “SUN2000-28KTL” in their mega solar business where they provide an EPC (Engineering / Procurement / Construction) service to the large-scale PV power generation systems to talk about their assessment on the product as well as the partnership with Huawei.
Speedy Construction and MaintenanceWith Power Yields Going Up 5 - 10%
Huawei: Many players from various industries are embarking on EPC for solar PV systems. How do you differentiate yourself from competitors?
Mr. Sakae: One of the elements is “speed”. Whether it be construction or management, the longer it takes, the higher the capacity loss becomes. We can leverage our advantage as a builder to build facilities promptly, and cooperate with group companies to provide consistent service up through O&M (Operation and Management), which would put forward unique value to our customers. The installation of the distributed PCS is part of that plan.
Huawei: What do you see as the advantage of the distributed PCS?
Mr. Sakae: The traditional large- scale PCS was about the size of a vending machine with the weight close to one ton, which has made it hard to find an installation place and required an extensive installation work with heavy machines. On top of that, when here was a failure, a manufacturer had to send an engineer onsite to carry out time consuming process to figure out a cause and fix the problem. All the panels connected to the concerned PCS were to be affected until its recovery. It also meant that more devices would be affected as system scale increases.
On the other hand, Huawei’s Distributed PCS is 50 times smaller than the large-scale system with the weight of about 50kg. It can be carried around easily. No heavy machines or foundation work is required, and you can install it effortlessly. Fewer number of connected panels means smaller areas being affected. Since you just have to replace a failed unit with a spare, the recovery is fast. In fact, the recovery period has been reduced from one week of a large-scale system to two days. No other product has ever fulfilled the needs for a high speed construction and management at this level.
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