Solar Roof System – My First Plan

Hello,

Just diving into the solar world for the first time. I’d like if possible to design a system which is expansive so I can potentially add more arrays and a wind turbine later on. I came up with the following plan.

https://preview.redd.it/pwmqf5wia4j91.jpg?width=937&format=pjpg&auto=webp&s=f4d1086aad57e5dda670b7f79d6242db065acd92

There is the potential for the cells to unbalance, say if one cell always had shade on it. Example: the top cell is 13v and the bottom is 7v. Another two panels/cells in parallel could offer a greater voltage potential which would over-charge the 13v cell? Maybe then the MPPT’s should dump into batteries only in parallel?
Since writing it I’ve learned most MPPT are buck only, that’s probably ok. As an electronic engineer I’m aware buck/boost work most efficiently when the input voltage is similar to the output voltage and in the above application the 24V to 240V may be better as 48V to 240V. This I could achieve using 24V cells and possibly two 12v batteries per cell (or some form of 24v battery).

I’m also wondering if it’s a thing in houses to have a 24/48V loop for doing room lighting (since they’re all LED nowadays) and skip the efficiency drop of the inverter for that type of consumer.