As a member of the solar industry, I can confirm that squirrels love to destroy everything associated with electrical infrastructure. Special compounds are added to wire insulation to make it unpalatable - they eat it anyway. Steel cloth is wrapped around PV arrays to prevent squirrels from getting to the wire - they chew through it (seriously). If they make a home under the array, they dig through the shingles into your attic, pull up romex, and use it to make nests. What is their deal? WHY?
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