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Chapter 5 - Quiz

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1. What is the main objective of energy needs analysis when sizing a photovoltaic installation?
Determine only the power of the inverter. Accurately assess the daily energy required in order to properly size the system. Choosing the photovoltaic cell technology. Define only the type of fixing structure.
2. What formula can be used to calculate the daily energy consumed by an electrical appliance?
Energy (Wh/day) = Power (W) × Usage time (h/day) Energy = Voltage × Current Energy = Power ÷ Time Energy = Current × Resistance
3. Which parameter is primarily used to account for the overall losses of a photovoltaic system when calculating the required power?
The temperature coefficient STC conditions Equivalent Solar Hours (ESH) The overall performance ratio (Performance Ratio - PR)
4. Equivalent solar hours (ESH) represent:
The total duration of sunshine over a year. The average lifespan of a photovoltaic panel. The number of hours per day during which the irradiance is equivalent to 1000 W/m². The time required to recharge the batteries.
5. What is the correct formula for determining the required photovoltaic power?
PV power = Daily energy ÷ (HSE × Overall efficiency) PV power = Daily energy × HSE PV power = HSE ÷ Overall efficiency PV power = Power of one panel × Number of panels
6. Why is it recommended to add a safety margin when sizing a photovoltaic field?
To reduce the voltage on the panels. To reduce the number of modules to be installed. To compensate for losses, panel degradation and a possible future increase in consumption. To comply only with international standards.
7. After calculating the number of panels required, what check should be carried out as a priority?
Check the color of the photovoltaic modules. Check that the available surface area allows for the installation of the panels and the necessary spacing. Check the frequency of the electrical network. Only check the manufacturer's warranty.
8. In a series connection of photovoltaic panels, which electrical quantity remains constant?
Power Resistance Tension The current
9. What is the main objective of sizing a grid-connected (On-Grid) photovoltaic system?
Reduce network consumption, maximize self-consumption and improve the profitability of the installation. To ensure several days of autonomy without batteries. Increase only the battery capacity. Supply only priority loads.
10. What sizing error can lead to an installation unable to meet the user's actual energy needs?
Choose a high-efficiency panel. Underestimating electricity consumption by forgetting certain appliances or their duration of use. Add a safety margin. Check the inverter specifications.