   # Several PV cells totaling 4.2 m 2 of active area are mounted on a rooftop. If you assume solar power to be 1000 W/m 2 and assume the cells are 14% efficient, how much power (in watts) can they produce? ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

#### Solutions

Chapter
Section ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 10, Problem 28E
Textbook Problem
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## Several PV cells totaling 4.2 m2 of active area are mounted on a rooftop. If you assume solar power to be 1000 W/m2 and assume the cells are 14% efficient, how much power (in watts) can they produce?

Interpretation Introduction

Interpretation:

The power produced by the given PV cells is to be determined.

Concept Introduction:

Power input on a PV cell is the total active area of the PV cell multiplied by the solar power.

The percent of the input power that is converted into the output power by a PV cell is called its efficiency.

Percent efficiency of a PVcell is 100 multiplied by the ratio of power out and power in.

The expression is as follows:

Percent efficiency=Power outPower in×100 …… (1)

### Explanation of Solution

Given information:

The active area of the PV cell is 4.2 m2.

The solar power is 1000 W/m2.

The efficiency of the cell is 14 %.

The power input on the PV cell is calculated as follows:

Power input on the PV cell=(4.2 m2×1000 Wm2)

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