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Sharp's Battery System Efficiently Stores Solar Electricity

2018/05/16 16:13
Sousuke Kudou, technical writer
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The home-use "Cloud Storage Battery System." The "JH-WB1821" Li-ion battery (left) and the "JH-42JT2" hybrid power conditioner (right). The JH-42JT2 has the same external appearance as the JH-55JT3. (source: Sharp)
The "NU-210AH" residential monocrystalline solar cell module (source: Sharp)

Sharp Corp will release a new model of its home-use "Cloud Storage Battery System," which can store power generated by solar panels, July 6, 2018.

It supports rapid charging and can efficiently store solar electricity in a battery even with few hours of sunshine.

The product code of the new system is "JH-WBP67A/JH-WBP70A." It can store solar electricity and low-priced nighttime electricity and supply it at the time of disaster or during hours when the amount of power generation is small.

Also, when the system works in conjunction with a DC (direct-current) hybrid air conditioner that can be powered by the stored electricity without DC-AC conversion, it becomes possible to reduce conversion loss, compared with normal air conditioners.

The Cloud Storage Battery System consists of the "JH-WB1821" lithium-ion (Li-ion) storage battery and the "JH-42JT2/JH-55JT3" hybrid power conditioner. The nominal capacity of the storage battery is 8.4kWh. Sharp halved the time it takes to fully and rapidly charge the battery to about 2.5 hours, compared with the previous model.

The rated output of the hybrid power conditioner at the time of stand-alone operation was increased to 2.0kW. The JH-42JT2 has a conversion efficiency of 96.0% (with a power factor of 1.0). The number of input circuits is two. When connected to a power grid, its rated output is 4.2kW.

The JH-55JT3 has a conversion efficiency of 95.5%. The number of its input circuits is three. When connected to a power grid, its rated output is 5.5kW.

The JH-WBP67A combines the JH-WB1821 and JH-42JT2, and its manufacturer's suggested retail price is ¥2,910,000 (excluding tax, approx US$26,390). The JH-WBP70A consists of the JH-WB1821 and JH-55JT3, and its manufacturer's suggested retail price is ¥2,980,000 (excluding tax). Sharp will produce 250 units per month.

Also, Sharp will release the "NU-210AH" residential monocrystalline solar panel July 23, 2018. It has a conversion efficiency of 18.2% and a nominal maximum output of 210W. Its manufacturer's suggested retail price is ¥96,600. The company will produce 6,200 units of the solar panel per month.