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Old 30-05-2013, 03:55   #1
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Instant electric shower system?

Just wondering if anyone has experience with these. I think it might be a good solution for a quick hot water shower but my inverter is rated to 1600W so it may be too small.
Portable Electric HOT Water Heater Shower System Instant HOT Shower DT375 | eBay
or something similar?
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Old 30-05-2013, 04:11   #2
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Re: Instant electric shower system?

You might need a decent inverter. Its rated at 3000w. I can remember similar systems in beach shacks 40+ years ago. Saw similar being used in Cuba a couple of years back instead of hot water systems with tanks.

Certainly cheap, maybe nasty????????
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Old 30-05-2013, 04:16   #3
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Re: Instant electric shower system?

I used something similar to that in an apartment where the central hot water was shut off for a month every year.

It worked surprsingly well. I have often thought that something like this would be great on a sailboat, even better than on land since we use smaller quantities of water for our showers on board. As it turns out, 2kW or so is enough to produce a stream of hot water of modest volume.

You will want to find one with smaller power requirement, plus also upgrade your inverter, for it to work off batteries.
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Old 30-05-2013, 04:20   #4
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Re: Instant electric shower system?

These things are used all over the Third World.
They are in the plumbing shops here in Grenada... But I didnt see the prices.

If I had a big inverter I would think its an excellent idea for a shower on a boat.

I have used them in many backpacker hostels in many countries and hotels in Asia.

The design of the one you link to is quite different to what I have seen... Yours looks small and sleek... Could be great for a boat.

The ones I have used are like this http://sell.lulusoso.com/selling-lea...er-heater.html
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Old 30-05-2013, 04:35   #5
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Re: Instant electric shower system?

yeah I found them in a few hotels in Thailand, worked really well, thats why i thought it would be simple for the boat. But I dont want to upgrade the inverter so I would want one under 1600W or with adjustable power options. Also wondering if they still work when switched to the lower heat setting. Occasionally I just plug in the existing HWS to the inverter but it takes 20 mins to heat, drains at about 100 amps and I dont really like sucking out that much that fast from the battery bank, plus the tank is larger than I need for a quick shower
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Old 30-05-2013, 04:39   #6
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Re: Instant electric shower system?

Given that my one at home , permanently mounted into the shower is 7000W ( at 230VAC) , I cant see how a 1500-1600W unit would be a whole lot of use, either it would be only lukewarm or the flow rates would be a dribble!!

Dave
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Old 30-05-2013, 04:46   #7
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Re: Instant electric shower system?

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Originally Posted by goboatingnow View Post
Given that my one at home , permanently mounted into the shower is 7000W ( at 230VAC) , I cant see how a 1500-1600W unit would be a whole lot of use, either it would be only lukewarm or the flow rates would be a dribble!!

Dave
The one he's looking at is 3000W. But I think 2000W would probably be ok for a modest flow and not too big a temperature difference (ie, you're not heating water from 5 degrees C).
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Old 30-05-2013, 04:48   #8
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Re: Instant electric shower system?

Quote:
The one he's looking at is 3000W.
Yes but hes looking for one to fit his inverter

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Old 30-05-2013, 05:08   #9
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Re: Instant electric shower system?

Looks like it will need 3000 watts to take a good shower with on demand tankless.

CORAL Tankless Hot Water Heater Electric Shower Head 110 Volts Showerhead - Amazon.com

Compact Exquisite Design: The water heater's compact design, the size of shower head, takes up reduced space and attractively decorate modern living spaces. Multiple Uses: This amazing instant water heater is designed for one point of use at a time. It is Ideal for small apartments, flats, hunting cabins and small homes as well as boats, campers, RV's and mobile homes. It delivers over 40 gallons of hot water an hour with a 45 degree rise in temperature. This means that if your tap water is at 65 F, it will instantly deliver 40 gallons of hot water an hour of water at 110 F. Infinite applications can be found for the extraordinary Excel tankless water heater. Our customers also use them for washing stalls,horse trailers, de-icing cars in the winter, outdoor camping, RV s, motels, small roadside restaurants and other situations where endless and economical water heating is required . Used in Australia, Europe and Japan for many years, this technology is now revolutionizing the way we heat water in America.
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Old 30-05-2013, 08:12   #10
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Re: Instant electric shower system?

yes and yes, looks like its back to the solar shower!
thanks for the replies
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Old 30-05-2013, 08:27   #11
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Re: Instant electric shower system?

And at $39 for the Coral heater if it doesnt work to your satisfaction just bin it!
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Old 30-05-2013, 10:41   #12
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They make propane fired inline water heaters as well. The install would be more complicated but they'd be easier on the battery bank. I've used them on land and they work really well
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Old 30-05-2013, 11:11   #13
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Re: Instant electric shower system?

Don't this devices need water pressure to work?
The most pressurisation on our boat depends how high you can hold a bucket above your head.. That enough??
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Old 30-05-2013, 11:22   #14
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Re: Instant electric shower system?

Here's the problem I see: "The water temperature is opposite with water flow rate,that means the water temperature is the lowest when the water flow rate is the biggest and the water temperature is the highest when water flow rate is the smallest."
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Old 30-05-2013, 11:36   #15
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Re: Instant electric shower system?

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Originally Posted by Cheechako View Post
Here's the problem I see: "The water temperature is opposite with water flow rate,that means the water temperature is the lowest when the water flow rate is the biggest and the water temperature is the highest when water flow rate is the smallest."
But thats good... use les elec and save water
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