Let's face it - most solar installers would rather talk about energy output than hole sizes. But here's the kicker: 38% of warranty claims stem from improper mounting hardware installation. The holes you drill today determine whether those panels will still be there after the next nor'easter.
Last summer, we watched a crew use clay tile bits on standing seam metal. The resulting Swiss cheese roof cost them $15k in repairs. Don't be those guys.
Modern solar arrays aren't just screwed down - they're engineered systems. That 400W panel? Its mounting points double as structural reinforcement against torsion stress.
Old-school roofers might scoff at our laser alignment tools... until they see us install 50kW arrays in half the time. The sweet spot? Pairing thermal imaging (to avoid electrical/plumbing) with good old chalk lines.
Hurricane Sandy taught us this: Properly installed panel holes can withstand 145mph winds. The secret sauce? Compression limiters in mounting hardware that prevent over-crushing of roof materials.
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