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Home » Reader question » Reader question: Which power generator should I buy?
Reader question: Which power generator should I buy?
Dear readers,
During the rainy season it often happens that the power goes out here in the Isaan, so I would like to buy a generator but have no idea how many amps that thing should supply?
I have air conditioning running in the bedroom 1 and a dishwasher, washing machine and bread maker in the kitchen. Is there someone with technical know-how to tell me with this info, which generator I should buy?
Regards,
Jos
Hello Jos,
You can calculate the required power by adding up the wattage of the devices you want to use simultaneously. Do not forget to add the lamps, TV, internet modem, etc. if you also want to use them.
The wattages must be indicated on the devices.
When you know the total number of watts, divide this by 220 (mains voltage in Thailand is 220V) to calculate the number of Amps. Then take a safety margin of, for example, 10% to absorb peak voltages when devices are switched on.
Yours faithfully,
White
Dear Jos, are you looking for a 4-stroke petrol engine, take a look at Honda generators.
If you are looking for a diesel engine, go look at Panasonic.
Stuff that is for sale at many large hardware stores such as Global house is Chinese and of lesser quality.
Jan Beute.
I want to tell you more when purchasing, so first determine your required Wattage.
Formula is P= U x I or Power is applied Voltage times the Current.
If you finally know it, buy a generator with a considerably higher max Wattage than calculated.
Because if you don't do that and the generator has to run on its toes regularly at peak performance. Over time, this can cost you a burnt layer of lacquer around the copper wire of the windings of the coils due to overheating.
Another reason is to think of the starting current of an electric motor, such as with air conditioning and washing machine, refrigerators, freezers, water pumps, this is only short, but it can throw out the safety switch on the generator.
Jan Beute.
Thanks Jan
Hi, add up the number of watts these things use together, divide that by 230 and the result is the number of amps you need.
I have a 2 kW generator here and that is more than enough for an air conditioner, some fans and a few refrigerators.
If you buy one, make sure you buy a low-noise one.
Aggregates come in different sizes and powers. The technique used also differs.
Whisper generator (petrol, 230 V), a compact model that delivers up to 1000 W and is quiet and economical in use.
Petrol aggregate (gasoline, 230 V), in an open rack, typically from 1000 W to 3000-6000 W.
Petrol generator (petrol, 230 V/400 V), for heavier equipment that requires three-phase power (400 V).
Diesel generator (diesel, 230 V/400 V), more reliable than petrol engine models. Powers from 3000 to 6000 W.
Diesel whisper generator (diesel, 400 V), in closed housing, low noise level just like the petrol whisper models. These aggregates are used for events, road construction and construction sites, for example.
Hybrid generator (fuel with battery pack), generators that run on a battery pack during a low energy requirement. When the energy requirement increases, the generator starts and so the large energy requirement can still be met.
Take advantage of it, Gr Caspar
Caspar, thanks for the detailed explanation. !
Don't forget that the generator must switch on or off (automatically or manually) if the power fails or comes back on. Good luck with that
Good comments above. But just to be on the safe side: Does your house only have 1 phase 220-230V (perhaps: small user), or do you live in something new where they found 3 phase power better?
And do you want to turn the thing on and off yourself, or rather automatically (with ATS switch)?
Both things above can make quite a difference to your choice.
Diesel least maintenance. Also quieter. “Silent housing” or not, depends on your placement options and sound sensitivity. Good luck with your choice.
Well, you don't need to know the number of amps. It is about delivered wattage (power).
So you can add all Wattages together and then you know how much.
However, if a device is switched off, that thing does not consume anything.
Your washing machine, dishwasher are not on all the time, right?
You can take this into account. Washing machine on, then no dishwasher or other large power tractor..
Aircon bedroom continuous? You can also turn it off for a certain period of time.
However powers also vary depending on on/off hitting.
Just like your refrigerator, dishwasher, washing machine, coffee maker, kettle, electric fryer, iron, etc.
Most of the power is used to reach a certain temperature in these machines. Usually on or off.
The greater (capacity) the more expensive the generator.
Casper has already indicated the various models. Geert has already indicated that 2000 watts is sufficient. Would take a bit higher myself (5) 3000 Watt, (5) 3 kW.
After all, a heating element of a washing machine consumes 2000 watts. Do you have with or without element? However, only at the time of heating, then only engine for spinning, which is much lower in power.
Everything is determined how many devices (power) you want to run at the same time.
If you buy too small, certain heating / cooling processes take longer, all the power is used and can also have a negative effect on all. They run on too little power. Too little power overall.
You heat water in the washing machine and immediately turn on a kettle of 1000 W. You are immediately at the maximum of the aggregator (3000 W). If you also have the air conditioning on, all the power is distributed over these devices and others and they can all start to work poorly.
So plan.then or not and then buy a more expensive, more powerful generator.
Do you already know where to put it? If the generator is running, you have flue gases, not really nice to sit in, not even a neighbor. So will you have to go a little further from home? Then take generously sized electrical cables such as a 4 mm2 or even better 6 mm2. This keeps voltage losses lower. In advance in a plastic tube in the ground.
hello be sure to take a diesel of about 5000 toi 6000 watts you will never have any problems
grts French
always and diesel 5 to 6 kw never problems always starts
The Best
If you wish to use all these devices together, at least a 10KVA or even 12 KVA will have to be purchased;
This is a bit absurd of course. Better be a little careful and try to get out of the way and only use 1 or max 2 devices together. Then maybe buy a 5KVA. For me a diesel is always preferable; Consumption is noticeably lower than petrol but makes more noise and is also much heavier. When purchasing, always state whether or not electronic devices are being used. I myself know that electronics can sometimes fail if a cheaper generator is used.
Good luck
Omer Van Mulders
How about solar panels. We've got our roof full. Always power, even when PEA is not at home, 'free' power and absolutely silent. It requires an initial investment that pays for itself. Also here in Thailand.
don't start,
How many times a year does your power go out. At most about 10 times with me and then only at the beginning of the rainy season and for a relatively short time.
I bet when you need your generator it won't start because you haven't used it enough.
Fuel out, battery empty, carburetor clogged by residual fuel.
You're going to experience it all, just watch.
Dear Tooske, I also have a generator and it is rarely used.
But maintenance is also part of even a little-used generator.
Simply let it run for a few minutes once a month, and if you have to go there with batteries, you can put them on with the start choir at many generators.
Change engine oil once a year, I do it every two years, depending on the operating hours.
Jan Beute.
That's what I mean, if you rarely use it, you don't really need it.
Have you already inquired where the generator may/can be connected?
In front of or behind the (automatic) fuse box.
And when switching on the generator, the fuses of the house must be switched off, so that no major problems arise in the event of an unexpected return of the electricity!
Partly hence my comment about whether or not with ATS. Most simple, without ATS best with clear lever switch: Up power from A (eg public net). Down power from B (with that example, your generator). Intermediate position = 0 = everything off. Due to this switch and the neutral intermediate position, power from outside and inside can never come together and cause unwanted fireworks.
Clear (Indonesian) example: https://www.amanitekno.com/pemasangan-handel-pemindah-listrik-pln-ke-genset/
(PLN is the public grid here. Genset is the generator.)
Thanks Ton, after translation by Google this is a good manual
Dear Joseph,
You want to take on a wonderful project. Many recommendations in the above comments.
However, I still miss the biggest power guzzler in the above comments, namely the shower hot water heater. Usually the powers of these start at 3 kW.
Safety comes first and then the biggest challenge, already referred to, is the automatic switching on/off of the diesel (?) generator with the electricity network. It is even questionable whether you should do this manually as a layman. Only start if you are skilled yourself or have a reputable company install it.
Option of solar panel installation with batteries is probably the most obvious. However, then you can only use the batteries for a short time (a few hours) to use your air conditioning and most essential devices that consume little energy. A battery backup system is probably not really cheap. So you will have to go to the market for that.
I wonder what it will be. Good luck with your beautiful project.
Mrsgr, Frank.
Frank you are right, we live here with 3 people and 2 bathrooms, so definitely something to take into account