What type of PV panels to choose for your project?

Monocrystalline Panels: High Efficiency and Elegant Design

Monocrystalline photovoltaic panels are among the most commonly used types. Made from a single silicon crystal, they offer higher efficiency (17–24%) compared to polycrystalline panels. They have a homogeneous appearance and a dark to black color. The individual cells are characterized by rounded corners.

Monocrystalline panels are ideal for applications with limited space, where high performance is required – typically on the roofs of homes, commercial buildings, or industrial halls.

Polycrystalline Panels: Cost-Effective Solution

Polycrystalline silicon panels are manufactured using simpler technology, resulting in a lower initial cost.

The surface is typically blue to light blue, and their efficiency is generally lower than that of monocrystalline panels. While polycrystalline panels are gradually being phased out, they are still used in some cases.

Bifacial Panels: Energy from Both Sides

Bifacial panels can utilize not only direct sunlight hitting the front (top) side, but also reflected or diffused light from the rear (bottom) side. Both the front and rear surfaces of the panels are made of glass, allowing both sides to actively generate electricity.

This type is ideal for large solar farms, applications in mountainous and snowy areas (as snow reflects light very efficiently), and agrivoltaics. At Greenbuddies, we commonly install them on large industrial roofs with a glossy surface.

Lightweight Panels: Solution for Roofs with Limited Load Capacity

Lightweight photovoltaic panels are used when the roof structure has limited load-bearing capacity.

The front side is made of plastic, while the back is made of polymer or aluminum, framed either with a thin aluminum frame or completely frameless. These panels are flexible and can be slightly bent.

Other Innovative Panel Types

Thin-Film Panels:
These are made by vaporizing a thin layer of semiconductor onto glass, plastic, or metal. They are lightweight and flexible but have lower efficiency.

Transparent Panels:
A special technology that lets visible light through and utilizes the UV/IR spectrum. They are primarily used on building facades or in agrivoltaic installations.

Perovskite Panels:
One of the most promising technologies of the future. Perovskite-based panels achieve high efficiency (up to 33-35%), are lightweight, and inexpensive to produce. However, they are still in the development phase.

What Panels Do We Use Most Often at Greenbuddies?

For rooftop installations, we most often use:

• DMEGC Solar DM465M10RT-B54HBW — bifacial, monocrystalline, 465 Wp
• JA Solar JAM54D40 LB — bifacial, monocrystalline, 455 Wp

For ground installations, we use:

• DMEGC Solar DMxxxG12T-B66HSW — bifacial, monocrystalline, 695–720 Wp
• JA Solar JAM66D46 LB — bifacial, monocrystalline, 695–720 Wp

For roofs with limited statics, we install:

• DMEGC Solar DMxxxM10RT-54HSW-L — monocrystalline, 445–465 Wp, weight 13 kg
• AIKO Nebular 2P — flexible, polymer surface, weight 8.6 kg

Choosing the right type of solar panel depends on the specific installation, the structure of the building, and the economic requirements of the client. If you need advice on solar panels and installations, contact the Greenbuddies team, and we will find the perfect solution tailored to your needs.ní řešení na míru.