Esc or pdb to 300 amperes

hobbywing 80a 12s, tell me how to make a current sensor for such regulators? Are there any ready-made solutions on Aliexpress? I’ve never built such large ones, as I understand they don’t have built-in control?

Not from Aliexpress

are there any other options?

Mauch Sensor Hub perhaps with modules. Referencing Aliexpress I suppose you are looking for something cheap. Good luck.

it’s about accessibility

Delete. Nah, that won’t work.