Marko:
You are off to a good start, you will love having solar, especially if you go south. Many IP owners have installed their solar panels on top pf the bimini frame. To do this, you need to simply add a few down struts and two bows on top. The advantage to this is that you can still take down the canvas because there are no holes in the canvas and the solar is installed over and above all. It is also far cheaper than an arch. I would not place the solar on the davits as they flex and move a lot when sailing off shore. Here is a photo and a link to an album of our install.
www.ipyoa.com/photos?view=album&aid=1828
Hayden