A family of squirrels built a nest under a 7.6kW system located in the west end of Toronto. Of 34 modules and optimisers the squirrels damaged the leads on 32 modules and 18 optimisers. 5 of each had to be replaced while the rest were repairable. The built-in safety systems shutdown the system and protected both the home and the inverters from damage. To prevent the squirrels from moving back in Squirrel Guard was installed around the perimeter of the array.