Electricity from rooftop solar photovoltaic system can be generated at a cost of up to Tk 8.50 per unit or kilowatt-hour during the daytime with a potential to install such system on the rooftops of textile mills in the country for generating 400 megawatts of power.
The cost of electricity generation from the rooftop solar system is even less than the price of electricity, Tk 8.56 per unit, a factory receives from the national grid, according to a study carried out by Infrastructure Development Company Ltd.
The findings of the study were revealed at the inaugural ceremony of a rooftop solar project with 723-kilowatt capacity to be installed on a poultry shed at Bhabanipur in Gazipur on Sunday.
The IDCOL estimated the cost considering 80 per cent of finance at six per cent interest rate with a provision of repayment in 10 years with a two-year grace period.
According to the IDCOL, 1,500 members of the Bangladesh Textile Mills Association have 42 million square feet of rooftop space, which could be used to install solar photovoltaic system with 400MW capacity in total.
At the programme, state minister for power, energy and mineral resources Nasrul Hamid said that the rooftop solar photovoltaic system in the industrial units and urban residential buildings was emerging as a prospective sector in electricity generation using renewable sources.
He urged owners of factories and buildings to install rooftop solar photovoltaic system.
Power Division secretary Ahmad Kaikaus said that the government would soon announce feed-in tariff to facilitate individuals to supply surplus electricity to the power distribution networks from their solar photovoltaic system.
The minister and the secretary, however, observed that grid-tied large-scale solar parks were not much suitable for Bangladesh for ensuring reliable and round-the-clock electricity supply.
It requires arrangement of fuel oil-fired power plants to maintain power supply at night, said officials.
The government, however, plans to increase the country’s power generation capacity by 2,000MW by 2020 and 4,000MW by 2030 from renewable sources.
The IDCO study shows Tk 3.75 crore in investment is required for installation of rooftop solar photovoltaic system that will supply 7,55,998 units of electricity a year.
Any expense for land is not needed as the solar panels are suggested to be installed on rooftops of factory buildings, said officials, adding that the investment would be returned in six to seven years.
Such projects are traditionally financed by the World Bank, KWF Development Bank and GIZ of Germany, Asian Development Bank, Japan International Cooperation Agency and IDCOL in the country.
Now the country has more than 4.5 million units of solar home system mainly in the rural areas that has put Bangladesh on the top of the list of solar home system users in the world.
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