September 26 (SeeNews) - Bulgarian manufacturer of PVC and aluminium windows, doors and shutters Rollplast has deployed a battery system with a maximum output of 500 kW at its production site in Kostinbrod, raising the company's usage of renewable power generated by a rooftop solar photovoltaic (PV) installation, Japanese battery supplier NGK Insulators said on Tuesday.
Rollplast will meet roughly half of the power needs of its production site through the recently installed rooftop solar and energy storage system, NGK Insulators said in a press release without providing details of the supply agreement.
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The NAS batteries, which represent an energy storage system that uses sodium and sulfur, started operation in July, have a total nameplate capacity of 2,900 kWh and will allow Rollplast to potentially sell surplus electricity back to the grid.
The Bulgarian company is considering the use of NAS batteries in the next stages of extension of its production site in Kostinbrod, NGK added.
In March, Rollplast opened a larger facility in the western Bulgarian town for an investment of 30 million levs ($16.2 million/15.3 million euro), with plans to export production to Croatia.
Earlier this year, a Rollplast executive told SeeNews that the company is incrementally installing a grid-connected solar PV system of roughly 4 MWp together with an energy storage battery.
The NAS batteries for Rollplast were made by BASF Stationary Energy Storage (BSES), a wholly-owned subsidiary of German chemical manufacturer BASF, and procured by NGK under a sales partnership with BSES which has been in place since 2019. The partnership has to date enabled NGK to install 5,000 MWh of battery storage at 250 locations worldwide.
(1 euro = 1.95583 levs)