These are some pictures of my small off-grid photovoltaic system at home.
It is just a 50W module standing on the roof, with a 30A charger, 3 x 7.2Ah 12V Batteries and a 150W AC-Converter.
The charger is much bigger than necessary, but it was there, so why not use it? ;)
At the moment I power my Raspi on a bitcoin mining experiment with it.
Although it is and was cloudy, it was up and running for the past 9 days without a problem.
In the past 2 months before, i used it to charge my cellphone and power my notebook at day, which worked just fine.