To maximize your solar PV system's energy output in Vaduz, Liechtenstein (Lat/Long 47.1322, 9.5115) throughout the year, you should tilt your panels at an angle of 40° South for fixed panel installations.
[pdf] Some portable solar panels and charge controllers even have a USB port built-in so you don’t even need a deep cycle battery or inverter to draw 12V DC power. So to sum up. Can I run an inverter from a solar panel? Yes, but it will deliver inconsistent power without a battery.
[pdf] Solar panels of different watts should not be used together because they have different voltages and amps. The system will always choose the lowest voltage or amp, which will reduce efficiency and power output.
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