[t_tsonev]

You need a Solar Radiance map to say thay. Latitude is a factor, but so is climate.

Here's an example: https://re.jrc.ec.europa.eu/pvg_tools/en/

California and Arizona are comparable to Sahara, but Germany has much usable potential too.

[modo_mario]

The issue is that in winter in the likes of berlin when the need for power is highest you might as well not have them.

[actionfromafar]

The issue is that as solar panels become cheaper than dirt, we will find ways to use them which are not "base load" things. Maybe we in the future will factor in the annual Solar Harvest into our energy plans.

[amanaplanacanal]

Storage exists, and will continue to get cheaper.