Yes, it's hard to choose between them. They are all very good technologies. But I think if we look at the history of photovoltaics , the evolution of the last decade, has been using more and more high-performance technologies. So first of all, after 40 years of using standard technology, the transition to Perc technology was fast, and then almost as fast, the transition to TOPCon has been made, just because it's more efficient. So I think technology will continue to improve efficiency. I think the back contact technology, whether it's the TOPCon contact technology, or the heterojunction contact, or a combination of them provides the highest efficiency. So I think, this will be the next big shift after TOPCon, will be what we call HBC or TBC or HTBC, and that's my prediction.
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