What is G12 Series in Solar Panels?

G12 R Series 

The G12 R Series in solar panels refers to a specific type of solar cell size and format used in high-efficiency photovoltaic (PV) modules. Here's a breakdown of what it means:

🔍 What is G12 in Solar Panels?

G12 refers to the size of the solar cell wafer.

G12 wafers are 210 mm x 210 mm in size.

This is larger than older wafer sizes like:

  * G1 (156.75 mm)

  * M2 (156.75 mm x 156.75 mm)

  * M6 (166 mm)

  * M10 (182 mm)

Larger wafers like G12 allow more sunlight collection area, meaning more power output per cell.

🔄 What Does the "R" Mean in G12 R Series?

The "R" in G12 R usually stands for “Rectangular” or “Reformed”.

Instead of using square G12 cells, manufacturers cut the G12 wafers into rectangular formats to fit more efficiently into solar modules, improving power density and layout optimization.

Examples of sizes: 210 mm × 105 mm (half-cut rectangular cells)

✅ Advantages of G12 R Series Solar Panels

1. Higher Power Output: Up to 600W+ per panel.

2. Better Space Utilization: Optimized module layout with rectangular cells.

3. Reduced BOS Cost: More power per panel = fewer panels needed = lower installation costs.

4. Improved Efficiency: Often comes with N-Type Topcon or HJT technologies.

🏭 Leading Manufacturers Using G12 R Series

LONGi

JinkoSolar

Trina Solar

JA Solar