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This is getting annoying day by day and I am not sure that there is anyone on here facing the same as I am unless they are from a similar country as me, it's been 3 days in a role now that I've been battling with grid power fluctuations.

It keeps getting worse whereby my asic miner will randomly shut itself down, any miner that takes over 1500watt in my home will shutdown due to the fluctuations, is there anything I can do about this? I am running a solar setup too but that's when the sun is up but after the sun goes down it's a war of monitoring my miners so that they won't shut down, yesterday I went back to sleep thinking they are working and few hours later they shut down again.

I've never try to use a stabilizer because I don't know if a asic miner that draws a lot of power can work safely on a stabilizer, also I have never seen any video online where anyone use stabilizer with asic miners.

You are on the right way, you need a stabilizer.
In rural areas of Russia, where voltage is often unstable, miners use these types of stabilizers. I've given examples for a single-phase and a three-phase network.
https://resanta.ru/odnofaznyj-stabilizator-elektronnogo-tipa-s-cifrovym-displeem-resanta-asn-5000-1-c/
https://resanta.ru/trekhfaznyy-stabilizator-elektromekhanicheskogo-tipa-resanta-asn-150003-em/

Find an equivalent in your country.
The stabilizer operates in the 140-260 volt range, meaning that in this range, the output will be a safe 220 volts for your ASIC in a single-phase network.
However, if you experience power outages, you need a UPS.

Flaky mains usually trip the PSU's under-voltage protection, so the miner just dies and reboots. It's worst at sunrise/sunset when your solar/inverter hands off and the line sags for a moment. A 1.5 kW rig at 230V is around 6.5A.
A 10-15% dip spikes current and many ASIC PSUs say "nope".

You should isolate your mining device from the power grid with a UPS and/or a hybrid inverter that always outputs a steady voltage. Size this at least 2x bigger than the miner's wattage per unit.

You need to use a stabilizer that's specifically designed for the equipment you're using. Some have more power than others. Choosing the right stabilizer is the best option.

Another good practice is to ensure that your home network is properly configured and installed to avoid overloading circuits. Also, check that you have adequate circuit breakers for the ASICs' power consumption. Everything can influence network stability.

Power outage is not a problem, I've gotten used to that and I don't need UPS since my inverter is capable of switching from grid to solar or vice versa when one is down, thanks for your helpful replies FP91G, I know that stabilizer are built for such things but I wasn't sure it's safe for asic miners, thanks for clearing that doubt.

The Stabilzers you dropped are not available in my country, the manufacturer/brand is very suited for Russia consumers only, so I will have to find a brand that's available for my own country only or maybe I can buy from Amazon and ship it into my country.

Depending on your country or region I think you can install a mini step up transformer and a stabilisers circuit like others mentioned. Another alternative I've seen some persons apply is use a solar powered inverter system where you don't even notice power fluctuations and even when there's a power outage from the main grid, you'll not notice the switch to the inverter power immediately.
The major problem is mining wares draw a lot of power depending on your setup and setting up a solar system that can power them can be relatively expensive depending on your region also.

Main point to keep in mind is that when sizing ANYTHING electrical is that you must NEVER have a constant long-term load exceeding 80% of what the device (or wire) is rated. This applies to wiring, circuit breakers, stabilizers/UPS's, ect. The short form is to take your miners' maximum power rating and add 20% more then pick a stabilizer rated for at least that power, preferably substantially higher. eg for a miner rated 3,500w the stabilizer should be rated for at least 4,200w.

Keep in mind that a good safety margin should always be left, ensuring that equipment never operates near its limit. This increases wear and tear and exposes the equipment to potential power surges.

Any electrical equipment or installation can have a stabilizer, whether for mining or other types of use. Therefore, in highly unstable locations, the installation of stabilizers should be considered, not only for mining, but for the entire house and all electrical equipment.

This is exactly what I did, it will be stupid of anyone to buy a stabilizer that's the same wattage as the asic miner, there will be a big problem for sure if anyone tries this, even a non techy person should know this, but thanks anyway I appreciate your quality opinion.

I've got a 15KVA relay wall mount style stabilizer and this calculation is based on my asic miners I have running presently right now, I am in the range of 10,000 watt power consumption for my available miners, so I believe I am good this way, shipped and on the way, thanks for your contributions everyone.

I've already written that this leads to more serious problems. Hot ASIC chips are immediately left without cooling, which leads to chip degradation. Simply put, the chip will fail faster. ASICs are unforgiving of this kind of error.

I actually disagree about the 80% safety number

70 or 75% is better.

I have run dozens of models of asics.

Almost everyone runs over its wattage rating.

Ie lets take the s21 it claims to pull 3500 watts.

so 3500/.80 =4,375  and you are safe.

But if the room is hot it can pull 3700 to 3800 watts

which means 3800/.80=4,750  is the better number

and 4750 watts is more like

3500/.735=4,761.905  so a .735 or 73.5% is safer.

Also and this is complex lets say your 240 volts drops to 190 volts

depending on the quality of the voltage regulator it may only boost back to 212 or 220 volts.

I prefer to use a 5000 watt regulator for a 3500 watt machine..

which rates to 70percent

I have not had a failure with any 70% derate

the unit below with some proper rework inside is good enough to run a 3500 watt unit even if power drops to 190 volts

https://www.amazon.com/Norstar-DAVR-5000110-transformer-Automatic-Regulator/dp/B07169Z3XX/ref=sxin_17_pa_sp_search_thematic_sspa?



but if you do not know what you are doing do not open it to alter the wiring a bit.

It too so long to get my stabilizer  8) 8) 8) but it's finally here

https://i.postimg.cc/KRZPk1My/IMG-20251008-052945.jpg (https://postimg.cc/KRZPk1My)

https://i.postimg.cc/LqM651Jt/IMG-20251008-053135.jpg (https://postimg.cc/LqM651Jt)


Few days after, grid power becomes stable I guess they fixed the problem after making some complains but I will still install this stabiliser because of another day, it doesn't take very long for same grid problem to come back, can't waste weeks shutting down my miners again.

Cheers

When you hook it up show us a few photos

Thanks for the followup so far.

it is more likely the grid lacking stability.

I have run at places where 220 would drop to 190 one to two times a month for an hour at a time.

Not much I could do about as it was the backup power test of NYC NASDAQ exchange which was routed to the substation where our mine was.