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When they rolled out the product with tiny tiles I always thought musk was being to ambitious. The smaller the tiles the harder a solar roof gets.

Why are tiles small BTW? Could we use tiles as big as normal solar panels?

My guess would be they are the same size as shingle strips, to make it easier to work with for regular installers rather than specialists.

These things carry a lot of current though, so I would certainly not trust anyone without proper tools and training to put them on a roof.