Monocrystalline solar cells

Thanks to more advanced half-cell, TOPCon and HJT technologies, monocrystalline modules are more tolerant to shading, have lower temperature coefficients and operate with less power loss even on hot days. This is particularly important for industrial facilities, flat roofs or installations requiring high power density, where every watt counts.

Manufacturers offer 25-30 year performance and 12-15 year product warranties, and the panels are designed to last 30-40 years with minimal maintenance. The glass-plastic or glass-glass construction is resistant to hail, extreme temperatures and high wind loads, so your investment will really pay off in the long term.

Your business will generate its own green energy more efficiently, reduce its grid electricity purchases, and enjoy stable, predictable operating costs. As a residential user, you will increase the value of your home while becoming independent from constantly fluctuating energy bills.

As a reseller, installer, or wholesale partner, register in our B2B webshop before purchasingyourfirst solar panel ! After confirming your registration, you will be able to access our B2B webshop, where you will always find up-to-date information on prices, stock, and current discounts. Once you have logged in to the webshop, you can purchase solar panels and place online orders quickly and easily.

Do you have any questions about our products?

As a B2B partner, please contact your designated sales representative, where our colleagues will be happy to assist you and answer any questions you may have about the selected solar panel.

You can also find lots of useful information in the following frequently asked questions and answers:

What is the difference between monocrystalline and polycrystalline solar panels?

The most important difference lies in the crystal structure of the cells. Monocrystalline panels are made of a single silicon crystal with an orderly crystal structure, allowing electrons to move freely, resulting in an average efficiency of 20-24%.

Polycrystalline cells consist of multiple crystals that have grown together, causing the crystal boundaries to "break" the path of the charge carriers, resulting in an efficiency of typically 14-18%. Due to their higher efficiency, fewer monocrystalline modules are needed to achieve the same output, which reduces the roof or land area required and the BOS costs. They also differ in color: monocrystalline panels are uniformly black, while polycrystalline panels have a bluish-purple hue.

How do they perform in cloudy weather?

All silicon-based solar panels produce energy even in cloudy weather, but at reduced output (typically 10-30% of their nominal output). Modern monocrystalline panels—especially PERC, TOPCon, or HJT cell versions—utilize scattered light betterdue to their higher crystal purity and low series resistance , so they deliver a few percent more energy than polycrystalline modules with the same rated power even in cloudy weather.

The performance drop is slower, and the panels "wake up" earlier in the morning and continue to produce energy longer in the evening. However, if the roof surface is regularly shaded (e.g. by trees or chimneys), it is advisable to combine the system with a microinverter or optimizer, as the series connection of monocrystalline cells means that even a single shaded cell can inhibit the string.

What is PERC technology?

PERC is short for Passivated Emitter and Rear Contact. A thin dielectric layer is applied to the back of the cell, which reflects some of the previously unused photons back into the cell and passivates the surface, reducing electron recombination. This results in 1-2% higher efficiency, better low-light performance, and up to 0.1% improvement in temperature coefficient.

The technology has been in mass production since 2016 and now forms the basis of most monocrystalline panels above 400 W. The disadvantage is that the conversion of the production line is costly, which makes PERC modules slightly more expensive, but the increase in yield generally more than compensates for this.

What certifications should you look for when choosing a monocrystalline solar panel?

The most basic performance and durability tests are specified in IEC 61215 (load, heat and humidity cycles, UV aging) and IEC 61730 (electrical and fire safety) standards – without these, panels cannot be sold in the EU today.

For larger investments, it is worth checking the PID resistance (IEC 62804), ammonia and sand resistance (IEC 62716 / IEC 60068-2-68), and the manufacturer's ISO 9001 and ISO 14001 certified quality and environmental management systems. The logoof an independent certification body, such as TÜV Rheinland or SGS, provides an additional guarantee that the module has also met the above requirements in the laboratory.

SOLARKIT recommendations and reviews of monocrystalline solar panels

Maximum efficiency in a small space. Modern monocrystalline panels have an average efficiency of 20–24%, which means that the same amount of energy can be generated with fewer modules.

Long-term security. They have an expected lifespan of 30–40 years, which is backed by 25–40-year product and performance guarantees.

Proven reliability. According to the independent PVEL 2025 PV Module Reliability Scorecard, 50 manufacturers' monocrystalline modules have been awarded the "Top Performer" rating, which means stable quality and bankability.

Faster return on investment. The technology premium has now been reduced to a minimum, while higher yields and lower balance-of-system costs typically shorten the payback period.