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2. Grid-tie inverter - Wikipedia

   en.wikipedia.org/wiki/Grid-tie_inverter

   A grid-tie inverter converts direct current (DC) into an alternating current (AC) suitable for injecting into an electrical power grid, at the same voltage and frequency of that power grid. Grid-tie inverters are used between local electrical power generators: solar panel , wind turbine , hydro-electric , and the grid.

3. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   The result is a repeated voltage step sequence of zero, peak positive, zero, peak negative, and again zero. The resultant voltage waveform better approximates the shape of a sinusoidal voltage waveform than a single square wave. Most inexpensive consumer power inverters produce a modified sine wave rather than a pure sine wave.

4. High-voltage direct current - Wikipedia

   en.wikipedia.org/wiki/High-voltage_direct_current

   Long distance HVDC lines carrying hydroelectricity from Canada's Nelson River to this converter station where it is converted to AC for use in southern Manitoba's grid. A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. [1]

5. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   The SEER rating of a unit is the cooling output during a typical cooling-season divided by the total electric energy input during the same period. The higher the unit's SEER rating the more energy efficient it is. In the U.S., the SEER is the ratio of cooling in British thermal units (BTUs) to the energy consumed in watt-hours.

6. List of chess players by peak FIDE rating - Wikipedia

   en.wikipedia.org/wiki/List_of_chess_players_by...

   This list of top-ranked chess grandmasters is ordered by their peak Elo rating.The cut-off value is 2700 for men (players with a rating at or above this value are colloquially known as super grandmasters) and 2500 for women.

7. Kisekae Set System - Wikipedia

   en.wikipedia.org/wiki/Kisekae_Set_System

   Screenshot of a KiSS set being displayed. Kisekae Set System (commonly known as KiSS) is a blending of art with computers originally designed to allow creation of virtual "paper dolls".