Transformer 110-220 I brought this machine from Italy and to use in US should I use 1000 watt 220 volt transformer or try to change heating element to 110 volt?

Yes
Voltage and wattage printed is on end of each element
If element shows 240V 4500 watt, then element Wattage at 208V is reduced to 3375 watts and will heat 16+ gallons per hour
If element is rated 208 and 4500w, then element will operate at 4500 watt and heat 20 gallons per hour
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html

http://waterheatertimer.org/images/Whirlpool-energy-smart-watt-rating-IMG_2600.jpg

http://waterheatertimer.org/How-to-replace-water-heater-element.html

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

As you have not provided me with the information I requested I'm going to have to take a few guesses here Bob. You could be overloading the generator. You can't run a 10,000 BTU air conditioner off of a 1000 watt generator. You need to look at your load, (what you are trying to power), and determine how much power it needs. Almost everything has a tag somewhere on the device. Most don't give watt requirements. But they do tell you, how many amps the device pulls, as well as the voltage the device needs. So you need to do some math here. Volts X Amps = Watts. So if we have a 120 volt device, that pulls 15 amps, we need 1800 watts to power it. But it gets a little more tricky than that. Motors are often rated at what they pull while they are running! But it can take two or three times more power to get them started. Example... A motor rated at 10 amps, using 120 volts will be 120 X 10 = 1200 watts. But it could take 2400-3600 watts to get it running. So in theory a 3000 watt generator may die before it can start that load. Heating elements are also power hungry! Let's say you have a small 800 watt generator, and your just trying to run a simple coffee pot! Well the heating element in a typical coffee pot pulls 1000-1500 watts. A hair dryer or microwave oven rated at 1000 watts, is the power they produce, not the power they consume! So a 1000 watt microwave may pull 1600 watts of power to run. Most non US generators are highly over rated as well. I certainly would not trust a Harbor Freight 3000 watt generator to actually put out 3000 watts of power. Not that they are bad units, I would expect their numbers to be under PERFECT conditions. Temperature, humidity and altitude also play a part! Your 3000 watt generator is going to put out more power at 50 degrees, at sea level, than it is at 7000 ft in the mountains at 100 degrees. So my "guess" Bob, is that your just asking more from the generator than it can produce. Picking out a generator is not as easy as it looks. "Hey that one is $1000 and this one is $300! They both make power! What's the difference". The difference is what do you need to run! "Heck I'll just get that 50,000 watt unit"! Yeah you can do that too, but you will never use that much power, and you will burn way more fuel than you need to. My other "guess" is that you have a governor issue on the engine. As load increases the gov will throw more throttle to the motor. My generator has an option to run full speed or on the gov. So it will idle and burn less fuel while I am hammering in a nail, then go to full power when I trigger a saw connected to it. Lot's of factors involved here Bob.

look at your charger,on sticker you have the power it drain.

If you consider doing this the first thing is SHUT THE MAIN BREAKER OFF. Use an auxiliary light source to see when working in a dead panel. Always keep in mind an ARC FLASH ACROSS HOT MAINS HAS ENOUGH HEAT TO PEAL THE SKIN OFF OF YOU. Before an explanation of how to do it you should keep in mind that this is for a single receptacle only. If any other receptacles are on the same circuit they will also be changed to 240 volt receptacles and if you plug any 120 volt device into them, the 120 volt device will be destroyed. That said OK, any 120 volt outlet can be changed to 240 volt by removing the 120 volt circuits neutral, re identifying the white wire with red or black phase tape and connecting it to a new 2 pole 15 amp breaker. The maximum that this circuit will now load up to is, on #14 wire at 80% = 12 amps at 240 volts. The 120V receptacle must be changed to a 15A - 240V receptacle so that 120 volt devices can not be plugged into it. Never use 2 single pole breakers together because code requires that on a fault trip both legs of the 240V circuit must be disconnected simultaneously. OR USED A Quick 220 Voltage Converting Power Supply
Voltage converter buying guide. Voltage Transformer Buying guide.Voltage converters also known as voltage transformers are devices that convert foreign electricity to power devices from different parts of the world. A step down voltage converter is a 220 to 110 volts converter. A step up converter is a 110 volts to 220 volts converter. Our 2-way converters are voltage transformers that convert power from both 220 to 110 volts and 110 to 220 volts. They also work with 100 volts, 110 volts, 120 volts, 220 volts and 240 volts. This model is a 2 way voltage converter / voltage transformer available in many different sizes including 100 watts, 200 watts, 300 watts, 500 watts, 750 watts, 1000 watts, 1500 watts, 2000 watts, 3000 watts and 5000 watts.

You're not going to be able to do this with just a known Horse Power.

There are 3 elements to the equation, with any two, you can work out the third.

If you want to know how the amperage, you will need to know the voltage and wattage of the motor. I imagine that you already know the voltage (It's going to be 220V or 110 volt)

Watts divided by volts = Amps

Examples:

A 220v 1000 watt motor (1000 divided by 220) will draw 4.55 amps
A 110v 800 watt motor (800 divided by 110) will draw 7.27 amps

Bear in mind that most washing machines have a couple of windings for wash and spin. As an average, the was winding will usually be about 500 watts to spin and about 250 watts to wash. ALSO, bear in mind that if you are using this data for a WASHING MACHINE, then there is a water heating element in there too and that draws about 2Kw (2000 watts)

Dont just take this as read, you DO need to check wattages, but, working on what I have just said, the max consumption on a 220V machine will look like this:

At Spin, with a 500 Watt consumption: (500/220) = 2.3 amps
While Washing with a 250 watt consumption: (250/220) = 1.14 amps

Consider that the WASH and HEAT may be running at the same time.
2Kw heating (2000/220) = 9.1 amps PLUS 1.14 amps for the motor - Total wattage 10.24 amps

Watts / Volts = Amps
Amps x Volts = Watts
Watts divided by amps = Volts

Find the breaker for it (a double for 220) and substitue a single breaker (for 110). This will leave one wire unused from the breaker box to the outlet. You'll have to change the outlet of course to accommodate a normal 110 plug. You can also skip the breaker part and just change the outlet and cap off 1 of the hot wires. Just make sure to kill the power and be safe!

You test any element with a Multimeter set to OHMS, you should get a reading below 6 - 14 OHMS if it is MORE it is shot, if it is Less, by say half it is shot. If it is "Open Circuit" it is shot.
To know exactly what the, any, Element should be resistance wise, there is a simple formula. Watts = Amps x Volts. Say, 1000 Watt element. divided by 112 Volts = 9 amps. Now to get resistance we divide the Volts by the Amps = 112 Volts divided by 9 Amps = 12.5 OHMS easy huh? it doesn't have to be 100% accurate as there is a lot of losses etc, so a close figure is fine. + or - 10% is OK.

Same problem others have reported.

To test this you need to see if you have 110 volts on the primary of the heat transformer. You likely do not.
You then have to find out why. It could be a relay or a bad timer.

disconect the heatind element or elements on the live side and see if it still trips the 20 amp breaker. try that first.