JinkoSolar challenges Maxeon 7 with new, more power-efficient solar panel - CNET

Oct 24, 2024

Solar panel efficiency is set to improve significantly as JinkoSolar joins Maxeon with a new set of solar panels that can reach almost 25% efficiency.

Despite advancements in efficiency, even the best solar panels can't use most of the sunlight that hits them. The average solar panel is lucky if it's 20% efficient, meaning how much of the sun's energy the panel can turn into usable electricity. This may be set to change because Chinese manufacturer JinkoSolar has announced the Tiger Neo 3.0 modules with an efficiency of 24.8%.

To date, the most efficient solar panel has been the Maxeon 7, which reached nearly 25% (24.9%) efficiency in a lab setting, translating to 24.1% in real life. The Tiger Neo 3.0 panels come pretty close on paper, though it remains to be seen how well they perform in real-life usage.

To achieve this efficiency, the panels take advantage of tunnel oxide passivated contact (TOPCon) modules, which are more complicated than they sound but are low-cost and low-carbon materials for solar cells made out of epitaxially grown p-type silicon wafers. This material allows for higher voltages and fill factors than cells with a front-collecting emitter. According to PV Magazine, the Fraunhofer Institute for Solar Energy Systems (ISE) achieved a 26.1% efficiency for a TOPCore solar cell.

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Maxeon 7 solar panels -- not pictured here -- set a new standard for residential solar panels.

The new JinkoSolar panels are available in 495W and 670W output versions. The 495W panel is intended for residential systems, while the 670W is envisioned for utility-scale projects. The panels come with a 15-year product warranty and a 30-year performance warranty. Panel degradation is expected to be 1% in the initial year, with an annual degradation of 0.4%.

To give you some context, the average solar panel has an efficiency of around 20%, meaning 80% of the sunlight that hits the panel isn't converted into usable electricity. When CNET tests solar panels in our lab, we weigh solar panel efficiency at 5%, balancing it against various other factors to give it a final score. While an efficiency improvement of close to 25% isn't a game changer, it does mean that panels are becoming more efficient, so you'll need fewer of them to meet your needs.

While it's unclear when and where the Tiger Neo 3.0 panels will be available, JinkoSolar recently announced that it plans to list on the Frankfurt Stock Exchange and will establish a wholly-owned subsidiary in the US as part of its 1GW High-Efficiency Module Project.

Article updated on October 23, 2024 at 1:56 PM PDT

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