When people start looking into solar, one of the things they ask about is panel efficiency.

And naturally, the question becomes:

“If this panel is 22% efficient and that one is 20%… shouldn’t I just pick the higher one?”

It’s a fair question. But the answer can depend on a few factors.

What Does “Efficiency” Even Mean?

Solar panel efficiency is simply how much sunlight a panel can turn into electricity.

• A 20% efficient panel converts 20% of the sunlight it receives into usable power.
• A 22% efficient panel converts 22%.

That 2% difference sounds big on paper. But in real-world terms? It’s often a much smaller deal than people think.

Most quality residential panels today fall somewhere between 19% and 22% efficiency. That means the difference between many top brands is only a few percentage points.

So… Does That Difference Matter?

It depends.

If your roof has plenty of space, a 1–2% efficiency difference may not noticeably change your overall savings. We can usually design a system that offsets your usage either way.

Where higher efficiency panels really matter is when:

• Roof space is limited
• You want to maximize production with fewer panels
• There are layout restrictions or shading challenges

In those cases, squeezing out a little extra production per panel can help. But for many homeowners, it’s not a make-or-break factor.