solar energy system components

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Which of the following is not an important reason for understanding dark matter and dark energy?

a. Most of the universe is made of these two dark components.
b. Dark matter has the greatest influence on the motions of stars in galaxies and galaxies in clusters
c. Dark energy may have the greatest influence on the fate of the universe.
d. Learning what the nature of these components are may revolutionize our understanding of physics.
e. Dark energy is currently working to expand our solar system, which may result in the end of life on Earth in the next few billion years.

e. is not the correct answer. Dark matter and dark energy effect things only at the galactic scale.

Sunforce 7 Amp Charge Controller $17.41 The Sunforce 60012 7 Amp Charge Controller prevents overcharging of 12-volt batteries. It is intended for use with 12-volt solar panels, and can handle up to 7 amps of array current and up to 100 watts of solar power. The controller is easy to use with a charging light that indicates that your battery is charging, and a green light that indicates a fully charged battery. The 60012 measures 4 x 1 x…

Sunforce 60032 30 Amp Digital Charge Controller $78.52 Prevents overcharging of 12volt batteriesProtects battery from overcharge and dischargeFor use with 12 volt Solar Panels and batteries onlyHandles up to 30 Amps of Array currentHandles up to 500 Watts of solar powerMaintenance free protection of your solar panel and batteriesMaintains battery voltageMaintain 12 volt batteries in a fully charged state1 Year Warranty…

Sunforce 60031 10 Amp Digital Charge Controller $32.52 The Sunforce 10 Amp Digital Charge Controller is the perfect solution to prevent the overcharging of 12V batteries. It protects the battery from both overcharge and discharge. This product is for use with 12 Volt solar panels and batteries only. The unit handles up to 10 Amps of array current, and 150 Watts of solar power. With an LCD digital display, this unit also allows for completely maintenan…

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