How much tilt should photovoltaic panels have to be to be effective

To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees. [pdf]

Can the back of the sun generate electricity

When sunlight hits layers of silicon inside solar cells, an electric charge builds up, creating a flow of electricity.. When sunlight hits layers of silicon inside solar cells, an electric charge builds up, creating a flow of electricity.. An MIT team has developed a novel system for capturing and storing the sun’s heat so it can be used to generate electricity whenever it’s needed. The new system is simple, durable, and inexpensive. [pdf]
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Store solar energy without batteries Norway

Researchers at a lab in Trondheim, Norway have succeeded in storing solar and wind energy – without any form of advanced battery technology.. Researchers at a lab in Trondheim, Norway have succeeded in storing solar and wind energy – without any form of advanced battery technology.. Norway's Photoncycle has come up with a solution for storing solar energy captured in summer to be used in winter — with solid hydrogen. [pdf]