Regulating voltage at end of 200 foot 120 V AC extension cable

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THE SOLAR PANEL
This will clear-up a lot of mysteries of the solar panel.
Many solar panels produce 16v - 18v when lightly loaded, while other 12v solar panels will not charge a 12v battery.
Some panels say "nominal voltage," some do not give any value other than 6v or 12v, and some specify the wrong voltage. You can't work with vague specifications. You need to know accurate details to charge a battery from a solar panel.
There are 3 things you have to know before buying a panel or connecting a panel to a battery.

1. The UNLOADED VOLTAGE.
2. The voltage of the panel when delivering the rated current. Called the RATED VOLTAGE
3. The CURRENT.

1. The Unloaded Voltage is the voltage produced by the panel when it is lightly loaded. This voltage is very important because a 12v battery will produce a "floating voltage" of about 15v when it is fully charged and it will gradually rise to this voltage during the...

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