Solar panels and panel brands

Should You Buy Monocrystalline or Polycrystalline Solar Panels in 2026?

Published · By the SolarPanelX editors · Prices and specs as of that date, from the pages under Sources

Summary

For a new panel, the choice has mostly disappeared. Fraunhofer ISE's July 2026 report says multicrystalline silicon has effectively vanished from the market, with 2025 production at about 690 GW for monocrystalline and zero for multicrystalline. What you'll actually compare today are cell designs within monocrystalline, mainly TOPCon and heterojunction.

How each is made

Both start as molten silicon that is solidified into an ingot and sliced into wafers. DOE describes monocrystalline ingots as grown by the Czochralski process, in which a small seed crystal touches the surface of the melt and is slowly pulled upward to form one large cylindrical crystal. Multicrystalline ingots come from directional solidification: the melt cools slowly from the bottom up into a block of many large grains.

The choices inside monocrystalline

Fraunhofer reports that silicon wafers accounted for about 98% of 2025 production, that n-type wafers made up 86% of that, and that monocrystalline n-type TOPCon has become dominant. TOPCon and heterojunction are replacing the older p-type PERC design.

Both show up in residential products. The Qcells Q.TRON BLK M-G2+ is an n-type TOPCon module, and the REC Alpha Pure-RX uses heterojunction cells.

Where the old label still helps

If you're looking at an older rooftop system or a used panel, knowing whether it is multicrystalline tells you roughly what generation of equipment you're dealing with.

Sources

  1. U.S. Department of Energy — Solar Photovoltaic Manufacturing Basics
  2. Fraunhofer ISE — Photovoltaics Report (14 July 2026)
  3. Qcells North America — Q.TRON BLK M-G2+
  4. REC Group — REC Alpha Pure-RX

We have not tested these products. Specs, prices, stock and terms are as published on these pages on the date above and can change; check the manufacturer or retailer before you buy.

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