Behind-the-Meter vs Front-of-Meter Systems Quiz
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Questions and Answers

What is the purpose of a blocking diode in a solar panel circuit?

  • To decrease the current produced by the unshaded panel
  • To allow the current from the unshaded panel to flow through when one panel is shaded (correct)
  • To increase the resistance in the shaded panel
  • To prevent both panels from generating electricity

    • At what temperature is the best module operated under Nominal Operating Cell Temperature (NOCT)?

  • 48°C
  • 33°C (correct)
  • 25°C
  • 58°C

    • What conditions are specified under Standard Test Conditions (STC) for PV modules?

  • Cell temperature of 25°C and irradiance of 1000 W/m2 at an air mass of 1.5 (correct)
  • Irradiance of 500 W/m2 and air temperature of 30°C
  • Cell temperature of 50°C and no wind velocity
  • Irradiance of 800 W/m2 and air temperature of 20°C

    • In a solar system, what components can be removed on a bright sunny day and still power the a/c load?

    <p>Blocking diode and one panel</p> Signup and view all the answers

    How do by-pass diodes help in a solar panel circuit when shading occurs?

    <p>They allow current from unshaded panels to bypass the shaded area</p> Signup and view all the answers

    What safety standard must PV modules conform with according to the text?

    <p>UL 1703</p> Signup and view all the answers

    Why are c-Si modules very sensitive to shading?

    <p>Shading obstruction can be semitransparent or opaque</p> Signup and view all the answers

    In a solar panel setup, what is the purpose of a blocking diode?

    <p>To prevent the battery from overcharging</p> Signup and view all the answers

    Which factor determines whether a bypass diode is needed in a solar panel setup?

    <p>The possibility of shading on the panels</p> Signup and view all the answers

    What does the CSA Code apply to in relation to solar panels?

    <p>Manufacturer installation guidelines</p> Signup and view all the answers

    What is the purpose of a blocking diode in a solar panel circuit?

    <p>To prevent the battery from discharging through the panels</p> Signup and view all the answers

    How do bypass diodes help when one solar panel is shaded in a system?

    <p>They allow the current from unshaded panels to bypass the shaded panel</p> Signup and view all the answers

    Why are blocking diodes necessary in systems using solar panels to charge a battery?

    <p>To maintain power flow direction and avoid battery discharge</p> Signup and view all the answers

    When is a bypass diode most likely to be beneficial in a solar panel system?

    <p>When shading reduces power output from some panels</p> Signup and view all the answers

    Do solar panels typically come with additional blocking diodes despite having them already included?

    <p>No, because additional blocking diodes are not required</p> Signup and view all the answers

    What is the main reason why 'thin film' solar panels are currently not commonly used on residential roofs?

    <p>They are highly efficient.</p> Signup and view all the answers

    What is the primary function of a blocking diode in a solar panel circuit?

    <p>To increase the efficiency of solar panels</p> Signup and view all the answers

    In the context of solar panels, what is the purpose of bypass diodes?

    <p>To reduce the overall efficiency of the panels</p> Signup and view all the answers

    Why are thin film solar panels commonly found in large solar farm projects with ample land space?

    <p>To utilize their ability to store excess energy efficiently</p> Signup and view all the answers

    How do semipermeable membranes play a role in the operation of solar cells according to the provided text?

    <p>By increasing the absorption capacity of photons</p> Signup and view all the answers

    What is the range of efficiency for amorphous panels (thin film) as mentioned in the text?

    <p>8-9%</p> Signup and view all the answers

    How do polycrystalline solar cells differ from monocrystalline panels in terms of composition?

    <p>Monocrystalline panels are made from raw silicone formed into blocks</p> Signup and view all the answers

    How do Bifacial solar panels differ from traditional single-sided panels in terms of energy production?

    <p>Bifacial panels capture sunlight from both sides simultaneously</p> Signup and view all the answers

    What is the purpose of bypass diodes in solar panel circuits?

    <p>To prevent damage due to shading or cell failure</p> Signup and view all the answers

    How do amorphous cells withstand higher temperatures compared to crystalline cells?

    <p>By maintaining output without being affected at high temperatures</p> Signup and view all the answers

    What is the significance of the warranty associated with solar panels?

    <p>It guarantees the level of power output the solar panel will maintain over time.</p> Signup and view all the answers

    How does shading impact the performance of crystalline silicon (c-Si) solar modules?

    <p>Shading can reduce the output power of the c-Si modules due to partial cell coverage.</p> Signup and view all the answers

    What is the purpose of blocking diodes in solar panel circuits?

    <p>To block reverse current flow and prevent damage to the solar cells.</p> Signup and view all the answers

    How do bypass diodes contribute to the performance of solar panel circuits?

    <p>Bypass diodes prevent hot spots and performance loss in shaded parts of the panel.</p> Signup and view all the answers

    What distinguishes monocrystalline silicon solar panels from other types in terms of efficiency and cost?

    <p>Monocrystalline panels have higher efficiency but are more expensive.</p> Signup and view all the answers

    What is a characteristic of Photovoltaic Poly Crystalline Silicon Modules compared to Mono panels?

    <p>Lower efficiency</p> Signup and view all the answers

    How can you distinguish Poly-silicon panels from other types of solar panels?

    <p>By the groovy mélange of silicon woven through thin rectangular wires</p> Signup and view all the answers

    What term best describes the silicon material used in Amorphous Solar Modules?

    <p>Shapeless</p> Signup and view all the answers

    What was a limitation of Amorphous Silicon Solar Cells for a long time?

    <p>Low power output</p> Signup and view all the answers

    Why are Thin Film solar panels commonly used in big solar farm projects but not on roofs?

    <p>Very inexpensive to make</p> Signup and view all the answers

    Which type of solar panel contains no cells and is directly formed on a glass substrate?

    <p>Amorphous solar panels</p> Signup and view all the answers

    What is one reason Poly-silicon panels are suitable for roofs?

    <p>Construction design compensates for efficiency loss</p> Signup and view all the answers

    'Thin film' solar panels are not commonly found on roofs because:

    <p>'Very inefficient'</p> Signup and view all the answers

    'Amorphous' silicon in solar modules refers to its characteristic of being:

    <p>'Shapeless'</p> Signup and view all the answers

    'Low power output' was a drawback of which type of solar cells for a significant period?

    <p>Amorphous silicon solar cells.</p> Signup and view all the answers

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