The electricity department is supposed to give us 230 volts supply. I love that "supposed to".
Because they often give us only 180 volts or sometimes even 170, 160, 250 and so on.
So the engineers designed the stabilizer which will automatically boost or buck the incoming
voltage and give a stabilized output.
That's nice but we want a lot of freebies with what we buy. So the sellers started giving away
FREE stabilizers with the products.
And slowly the stabilizers they started giving were an apology for a stabilizer. They hardly
boost 10 volts. This will harm the equipments.
Depending on how good or bad the voltage is in a particular area, the customer should choose
between a single-boost and double-boost stabilizer with an ISI mark and pay for it.
I do not wish to go into the details of single and double boost, etc. Any engineer will explain the details to you. Just ask.