Did you ever work out how much energy was expended to manufacture and transport the parts? Chances are that with solar panels facing west in a place like The Netherlands, it will take a long time to come out on top with your carbon footprint.

I reckon that the most energy-efficient setup for your blog would be a hosted solution. Data centres are already optimised for low energy use. And some cloud providers have committed to become carbon neutral.

Lowering your overall household electricity use would be a more effective way to lower your carbon output.