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  2. Inverter-based resource - Wikipedia

    en.wikipedia.org/wiki/Inverter-based_resource

    An inverter-based resource (IBR) is a source of electricity that is asynchronously connected to the electrical grid via an electronic power converter ("inverter"). The devices in this category, also known as converter interfaced generation (CIG), include the variable renewable energy generators (wind, solar) and battery storage power stations. [1]

  3. Solar panel - Wikipedia

    en.wikipedia.org/wiki/Solar_panel

    Manual cleaning tools are by far the most prevalent method of cleaning, most likely because of the low purchase cost. However, in a Saudi Arabian study done in 2014, it was found that "installed robotic systems, mechanized systems, and installed hydraulic systems are likely the three most promising technologies for use in cleaning solar panels".

  4. IG postcode area - Wikipedia

    en.wikipedia.org/wiki/IG_postcode_area

    The area served includes much of the London Borough of Redbridge, the western part of the London Borough of Barking and Dagenham, and the southwestern part of the Epping Forest district of Essex, while the western part of IG8 and IG11 covers a small part of the London Borough of Waltham Forest, and the London Borough of Newham.