Will a hot water heater element that is rated 220 volt AC by 2000 watts when only applying 110 volt AC just put out 1000 watt instead?
Hard to say, but remember that the power ratios with the square of the voltage, not linearly with it. Plus who knows what the control electronics will do with only 110Vac input. Probably better to just spring for a new heater module or a new water heater. How old is it?Will a hot water heater element that is rated 220 volt AC by 2000 watts when only applying 110 volt AC just put out 1000 watt instead?
As pointed out earlier, a 2000W rated element operated at half voltage delivers only 500W. It is useful perhaps to work out each scenario using the power formula @berkeman posted.I know they make 2000 watt X 110 volt elements except I didn't want to change elements as the water heater works fine with a 2000 watt 220 volt element.
I'm not following your line of thought.Basically your hooking two 110 volt lines to each side of the element and I only want to hook one 110 volt line and ground to both terminals of the element.
I researched yesterday and found that I use about 20 gallons of water a day.well if it puts out 1/4 as many watt it should take 4 times as long to heat water. should work.
That would work pretty good I think you could just hook solar panel directly to bottom element would not even need to use an inverter only cost you would have for solar panel and piece of wire.Set the lower (solar PV) element to a higher temperature then the upper (grid) element may allow near 100% solar hot water during the sunny season.
That may or may not work, depending onThat would work pretty good I think you could just hook solar panel directly to bottom element would not even need to use an inverter only cost you would have for solar panel and piece of wire.
And on that note:The AC only ratings are probably dictated by thermostat switch contact ratings. A typical rating is 250V/10A, 125V/15A for AC, but unrated for DC (or, if it is, it would be limited to 30 volts at the 125 VAC current rating). The arc that occurs when the contacts open extinguishes when AC crosses zero volts, but a DC arc sustains until their separation distance becomes great enough. Not only does this generate a lot more heat, but in a physically small switch like a thermostat the distance between contacts may never open up enough to fully extinguish the arc, and they'll melt in short order.
I've changed my mind. I will not be doing that this summer.I may abscond with your idea and create a hybrid hot water system.
That's definitely a bad idea. You need 110V DC to have the similar power, but 110V DC is just not a thing you want to play around with at home (especially when water is involved).I think you could just hook solar panel directly to bottom element