If you do go for a electric wires around you setup, I would recommend a DC battery operated fence charger since you have no AC to your coops. Solar is ok but if weeds grow and touch the wires you will have more issues.
https://www.backyardchickens.com/threads/a-treatise-on-electric-fencing.1117877/
https://www.backyardchickens.com/threads/electric-fence-basics.1398976/
https://www.backyardchickens.com/threads/a-treatise-on-electric-fencing.1117877/
https://www.backyardchickens.com/threads/electric-fence-basics.1398976/