When connecting a solar panel to a 12V battery, you should use a solar charge controller. The solar charge controller prevents overcharging and will recharge the battery without damaging it. There are differe.
[pdf] We just divide 1kW or 1000W by 17.25 watts per square foot to get the roof size in square feet like this: 1kW Solar Panel Area = 1000W / 17.25W Per Sq Ft = 57.97 Square Feet As we can see, we need almost 60 square feet of roof area for a 1kW system (57.97 sq ft, to be specific).
[pdf] The had almost two (GW) of capacity at the end of 2010, but installed less than 10 megawatts (MW) in 2011 due to the being reduced by 25%, after installing almost 1,500 MW the year before. Installations increased to 109 MW in 2012. In 2014, no new installations were reported. The Czech Republic receives an average of about 1,670 hours of sunshine per year. 1 In the Czech Republic, the average annual energy yield for solar photovoltaic (PV) systems is approximately 1,000 to 1,200 kWh per kWp installed. 2
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