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Assume that the battery is at 40% of its rated capacity. The battery is now charging at a C-rate of 2C. What is the charging current in amps that is going into the battery? ______

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Consider a lead-acid battery with 100 Ah capacity and a rated voltage of 12 V.What is the total capacity of energy in watt-hours that can be stored in the battery? ______

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The Nuon team in TU Delft designed a very fast car powered by solar energy, the Nuna 7. They just came back from the World Solar Challenge 2013 in Australia after winning the first place. But they are already looking for improving their car. As storage, they need a solution as light as possible.Looking at the Ragone plot here, which would be the preferred technology for the batteries of the new Nuna car?

A. Lead-acid batteries
B. Nickel or metal hydride batteries
C. Lithium batteries
D. Lithium-ion batteries

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Which of the following is NOT a secondary battery?

A. Zinc-carbon batteries
B. Lead-acid batteries
C. Nickel cadmium batteries
D. Lithium-polymer batteries

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Which of the following statements is NOT true regarding the solar inverter topologies?

A. Module level (micro)inverters are better suited to get the maximum power out of each PV module than compared to central inverters, especially when there are partially shaded arrays.
B. String inverters ensure a higher yield than central inverters when there are partially shaded arrays.
C. String inverters ensure a higher yield than module level (micro)inverters when there are partially shaded arrays.
D. Module level (micro)inverters ensure a higher yield than string inverters when there are partially shaded arrays.

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