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Diode string - 30 of these in series should be reasonable: https://www.digikey.ca/en/products/detail/vishay-general-semiconductor-diodes-division/VS-E4TU2006FP-N3/8269295
We can connect all the diodes in series, but have a movable connection so that the string length can be adjusted for different numbers of solar panels.
Heatsink - diodes will get hot. Need a heatsink and fan to keep them cool. Something like this and a few fans should be good: https://www.digikey.ca/en/products/detail/advanced-thermal-solutions-inc/ATS-EXL76-300-R1/5848414
Or a few of these
2 of these heatsinks, with half of the diodes on each one, mounted so that it forms a channel for the fins in the middle and the flat base on the outside: https://www.amazon.ca/Awxlumv-Amplifier-Transistor-Semiconductor-180mm69mm36mm300mm69mm36mm/dp/B07THL4Z12B07TJZ2MYZ/ref=sr_1_93?crid=389K27BX237GBBU8JQU8V7FI&keywords=aluminum+heatsink300*69*36&qid=16672546171667273517&qu=eyJxc2MiOiI1LjQ4IiwicXNhIjoiNS4wNCIsInFzcCI6IjQuNTMifQ%3D%3DeyJxc2MiOiIxLjM4IiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=aluminum+heatsink%2Caps%2C75300%2B69%2B36%2Caps%2C168&sr=8-9-3&th=1
Rough heat sink calculator: https://celsiainc.com/resources/calculators/heat-sink-size-calculator/#:~:text=Heat%20Sink%20Sizing%20Calculator%20%2D%20Rough,(Tjunction%20%2D%20maximum%20ambient%20temperature)
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2 of these fans, one on each end of the heatsink module should be good: https://www.digikey.ca/en/products/detail/delta-electronics/AFB0824GHE/5799833
Fan power supply: https://www.digikey.ca/en/products/detail/mean-well-usa-inc/GST60A24-P1JR/10659909
Diode Temp rise
1.4V (diode datasheet) * 10A = 14W.
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If we keep the heatsink under 100C, the diodes should be fine. A few fans for lots of forced air should be able to do this.
Adding a few thermocouples to monitor temperature of the diodes would be a good idea though.
A few forum threads on building these:
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Before jumping into a purchase to make one of these, we can make a small model of one with regular diodes and test the IV curve. Just need to make sure to keep the tests quick so the diodes don’t heat up too much.