Suggest me nice and automatic voltage stabilizer

Hello everyone! I hope you all are having amazing day today.

Today i am looking for a voltage stabilizer which can possibly mitigate low voltage issues in home.

I am currently facing less cooling in air conditioning unit and also old fans(non dc motor) RPM is lower.

So i am planning to invest in some nice and automatic voltage stabilizer where features like surge protection and cut off when voltage is too low or high (out of the range of stabilizer) and automatic voltage regulation within its range (90v-270v) input to 230-240v output, is required.

Please suggest me some good and heavy duty one where i will put it in mains and forget about it.

Home electronics are:
9 ceiling fans, 2 1.5ton AC units, 1 washing machine, 1 water pump/motor, 1 geiser, my gaming pc, 2 server pc, 2 TVs, 1 induction cooker, 1 refrigerator, others smaller electronics..

Most equipment will not be used at once, but for staying in safe side i have decided to go with atleast 10kva voltage stabilizer.

What’s your experience with it, would love to have suggestions from you! Thanks..