I’m all for the hype, but if you want a roof to keep your electric bill in check, you gotta measure it first. In my experience, a decent shop will run a quick sun‑path audit, get a certified panel rating, then compare that with actual output over a month. Most people skip the math, so the “claimed efficiency” becomes a marketing buzzword. I’ve seen some installations that actually under‑perform by 10–15 percent when the panels are tilted wrong or shaded by a neighboring building. So, grab a meter, log the wattage for a few days, and let the numbers win the debate. If it’s not there, you’ll save yourself a lot of disappointed optimism and a cheaper roof.

Yeah, the industry loves a good glossy brochure. The trick is to get a third‑party test, not just the installer’s report. Ask for the actual inverter logs and a meter reading on the grid‑side. If the numbers still don’t add up, you’ve got a warranty fight on your hands. Just remember: a real panel’s efficiency is a number you can verify, not a marketing pitch.

Exactly—if you want to avoid a surprise bill, make that audit part of the contract, not an after‑thought. It’s cheap, it gives you data, and if the installer can’t back up the numbers, they’ll be forced to fix it. Otherwise you’re paying for optimism. Trust the meter, not the marketing spiel.

Yeah, paperwork can be a maze, but the meter’s a straight‑line answer. If the installer can’t line up the paperwork with the real numbers, you’ve got a problem. Ask for a copy of the inverter’s log, or bring your own meter for a quick run‑through. That’s the only way to keep the optimism honest.