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12-14-2013, 11:32 AM
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#1
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Guru
City: Hotel, CA
Join Date: Sep 2011
Posts: 8,323
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Induction Cooktops
Considering options for replacing our antique 2 burner electric cooktop with a single burner induction unit. We will install an inverter as part of this upgrade and notice 1500 watt is a popular size inverter and 1800 watt seems popular for induction cooktops. We found this one rated at 1500 watts and wondered if any of you have an opinion about it or better option for us?
https://www.google.com/shopping/prod...ed=0CHcQ0C8wAQ
FYI, we are more day boaters/picnic cruisers not to be mistaken with long range cruiser/live aboards.
__________________
Craig
It's easier to fool people than to convince them that they've been fooled - Mark Twain
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12-14-2013, 11:58 AM
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#2
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Senior Member
City: Palmetto Bay
Vessel Name: Sunshine
Vessel Model: Island Pilot DSe 12m Hybrid
Join Date: Apr 2013
Posts: 268
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We used Cooktek single burner drop-in 1800 watt units on Sunshine. They are commercial grade with a commercial price of $700 each. They are top of the line, excellent units and have1,500 watt ones available, both drop-in and counter top Buying today, I'd go for something similar to that home-style, consumer unit you have found.
My suggestion? Buy it and use it at home. If you don't like it, take it back to Walmart. And try something else. Once you've settled on a unit, then you can shop for the inverter - most likely 2kW minimum.
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Reuben Trane
"Sunshine" - Island Pilot DSe 12m
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12-14-2013, 11:59 AM
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#3
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Moderator Emeritus
City: Chicago, IL
Vessel Name: Bay Pelican
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,993
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It appears to have a digital display. Don't know if that is the case. A digital display raises the question as to whether it will operate on an MSW inverter, or must you buy a true sine wave inverter.
In either case I think you may be underpowered if you try and use a 1,500 watt inverter for this cooktop. Even if possible, it is probably not a good idea to run an inverter at max for long. 2,000 watts should be the minimum.
Good luck.
Marty
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12-14-2013, 02:09 PM
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#4
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Guru
City: Hotel, CA
Join Date: Sep 2011
Posts: 8,323
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Thanks guys. Mechanically there is precious little outside of my capabilities, electrically I'm a moron. I "google shopped" the silly thing and didn't notice it was walmart, I'll just buy it and try it at home as suggested.
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Craig
It's easier to fool people than to convince them that they've been fooled - Mark Twain
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12-14-2013, 03:36 PM
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#5
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,786
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I hope you realize that these only work with ferrous metals: cast iron, ceramic coated steel and some stainless steels. If a magnet will stick, it will work.
David
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12-15-2013, 04:49 AM
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#6
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Guru
Join Date: Oct 2007
Posts: 22,553
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I asked this same question on a Bus board , and the response was induction cook tops dont like inverter power, esp small inverter power.
Trace 4KW,, Mastervolt or other large sine wave unit might be different.
I would try it out on someones boat or RV and see if it actually works.
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12-15-2013, 09:13 AM
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#8
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Guru
City: St Augustine, FL
Vessel Name: RunningTide
Vessel Model: 37 Louisiane catamaran
Join Date: Jul 2013
Posts: 930
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Calling all Cooks,.... Gas, Electric, or Inductive
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12-15-2013, 03:53 PM
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#9
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Guru
City: St Augustine, FL
Vessel Name: RunningTide
Vessel Model: 37 Louisiane catamaran
Join Date: Jul 2013
Posts: 930
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And just found an older conversation I started on a similar subject a while back....
Cooking Apparatus on Boats
Cooking Apparatus on Boats - Boat Design Forums
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12-15-2013, 07:20 PM
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#10
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Guru
City: Miami
Join Date: Jul 2013
Posts: 800
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Quote:
Originally Posted by FF
I asked this same question on a Bus board , and the response was induction cook tops dont like inverter power, esp small inverter power. Trace 4KW,, Mastervolt or other large sine wave unit might be different. I would try it out on someones boat or RV and see if it actually works.
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We run a single burner with no problems on our 4kw sw trace. Boils water for tea in 20 seconds. Even beats the nespresso machine.
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12-16-2013, 06:07 AM
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#11
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Guru
City: St Augustine, FL
Vessel Name: RunningTide
Vessel Model: 37 Louisiane catamaran
Join Date: Jul 2013
Posts: 930
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Wikipedia excerpt
Induction cooking - Wikipedia, the free encyclopedia
Quote:
In an induction cooker, a coil of copper wire is placed underneath the cooking pot. An alternating electric current flows through the coil, which produces an oscillating magnetic field. This field induces an electric current in the pot. Current flowing in the metal pot produces resistive heating which heats the food. While the current is large, it is produced by a low voltage.
An induction cooker is faster and more energy efficient than a traditional electric cooking surface. It allows instant control of cooking energy similar to gas burners. Other cooking methods use flames or red-hot heating elements; induction heating heats only the pot. Because the surface of the cook top is heated only by contact with the vessel, the possibility of burn injury is significantly less than with other methods. The induction effect does not directly heat the air around the vessel, resulting in further energy efficiencies. Cooling air is blown through the electronics but emerges only a little warmer than ambient temperature.
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I'm hoping to look at a few more details on how these cooktops actually operate, and most importantly what their max current draw is, and for what duration??
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12-16-2013, 07:27 AM
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#12
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Guru
City: St Augustine, FL
Vessel Name: RunningTide
Vessel Model: 37 Louisiane catamaran
Join Date: Jul 2013
Posts: 930
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Current Draw?
...from another forum
Quote:
Originally Posted by pdwiley
2 problems I see if you're not running a generator system (or plugging into a shore power socket every day).
1000 W medium setting equals 83 amps at 12V from your battery bank. Don't know about others but I really don't want to run a generator just so I can cook.
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I'm wondering if your figures are a reality? If so I'm not sure that any electric cooktop could be utilized on a vessel powered by batteries and inverters,....yet there are a growing number that are doing so.
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12-16-2013, 08:42 AM
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#13
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Senior Member
City: Palmetto Bay
Vessel Name: Sunshine
Vessel Model: Island Pilot DSe 12m Hybrid
Join Date: Apr 2013
Posts: 268
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Sunshine's Induction Cooktops
Here's a photo of our induction CookTek cooktops. (It is hard to pick out the black cooktops inlaid into the black countertop - you may discern the SS trim of each unit?) As mentioned before, these are commercial grade units designed for hotel and restaurant cooking stations. To the left of the tea pot are the two controls - you essentially set the temperature you want and it holds that level of heating.
We have the units wired to different inverters - that way, we don't overload a single inverter should we run both at full blast!
As I mentioned earlier, I most likely will use consumer-level units next time - perhaps at 240 VAC so we can have a single unit with multiple hobs. I have yet to find a dual hob unit at 120 VAC.
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Reuben Trane
"Sunshine" - Island Pilot DSe 12m
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12-16-2013, 09:38 AM
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#14
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Guru
City: Hotel, CA
Join Date: Sep 2011
Posts: 8,323
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Reuben I'm unfamiliar with the term "hob". Can you tell me what it means?
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Craig
It's easier to fool people than to convince them that they've been fooled - Mark Twain
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12-16-2013, 09:59 AM
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#15
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Senior Member
City: Palmetto Bay
Vessel Name: Sunshine
Vessel Model: Island Pilot DSe 12m Hybrid
Join Date: Apr 2013
Posts: 268
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"Hob"
solid cooktop burner - mostly cast iron ones are referred to as a "hob." Here's an image of a cook top with two "hobs." But can be used more generically to refer to a burner - and since on an induction cook top, there are no burners, perhaps hob is a better word?
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Reuben Trane
"Sunshine" - Island Pilot DSe 12m
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12-16-2013, 10:11 AM
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#16
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Senior Member
City: Cape Coral FL\Grand Island NY
Vessel Name: Missy
Vessel Model: 1997 Mainship 350
Join Date: Jun 2013
Posts: 192
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Quote:
Originally Posted by Bay Pelican
It appears to have a digital display. Don't know if that is the case. A digital display raises the question as to whether it will operate on an MSW inverter, or must you buy a true sine wave inverter.
In either case I think you may be underpowered if you try and use a 1,500 watt inverter for this cooktop. Even if possible, it is probably not a good idea to run an inverter at max for long. 2,000 watts should be the minimum.
Good luck.
Marty
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The unit we bought last year allows you to set the wattage from 100-1300. It works great, we didn't use the princess range once last season.
For $57 it's a winner.
Spt 1300-Watt Induction Cooktop, Silver : Amazon.com : Kitchen & Dining
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12-16-2013, 11:22 AM
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#17
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Guru
City: Miami
Join Date: Jul 2013
Posts: 800
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Quote:
Originally Posted by brian eiland
...from another forum I'm wondering if your figures are a reality? If so I'm not sure that any electric cooktop could be utilized on a vessel powered by batteries and inverters,....yet there are a growing number that are doing so.
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Here are some figures hot off the burner.
This was running full power for 1:37 to boil 16 ozs. of water in a teapot. The ac outlet is on a 15 amp breaker and it has never tripped. This is a 1500 watt el cheapo burner from a wholesale club. If you have the battery capacity it's worth trying for yourself.
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12-16-2013, 03:07 PM
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#18
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Guru
City: St Augustine, FL
Vessel Name: RunningTide
Vessel Model: 37 Louisiane catamaran
Join Date: Jul 2013
Posts: 930
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2 Burner Unit
Quote:
Originally Posted by brian eiland
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This reference I made before shows a 2-burner cooktop. I've ask the gentleman to join the conversation we are having here, as well as tell us the manufacturer of his unit.
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12-16-2013, 08:35 PM
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#19
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Veteran Member
City: Erie, PA
Vessel Name: LIBERTY
Vessel Model: Pilgrim 40
Join Date: Oct 2007
Posts: 70
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Since that is my picture...
It is a True Induction (brand name) unit. Induction Cooktops by True Induction | Single & Double Burner Cookers
We did have to purchase new pots and pans to use with it, but were looking for an excuse to buy a new set for the boat anyhow.
They have a 60 day risk free trial, buy one, use it and see if you like it or not.
We have a Victron 2500w inverter/charger and really haven't had the occasion to run it purely on the inverter, using either shore power or our 8kw genset.
When we first got it I tested it next to our natural gas range at home. I believe it brought water to a boil in slightly more than half the time it took the gas range to do the same (equal amount of water in the same pan). We really like it; spills are easy to clean not having any grates to deal with. The greatest advantage is that it stows away when not in use.
By the way, that sorry excuse for a counter top has been replace by this:
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12-19-2013, 11:49 AM
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#20
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Senior Member
City: New Castle, Delaware
Vessel Name: Belladonna
Vessel Model: Monark 58 custom
Join Date: May 2013
Posts: 132
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BTW, I have heard of some folks using a steel plate on their induction burners to enable them to use their aluminum pots and pans, and noticed that some induction burners for sale on ebay come with one. My neighbor has induction burners and she asked me to have a plate made for her. We are going to try 1/8" steel and see how that works. Total cost, $10. Probably cheaper than going out to buy all new pots and pans initially, if it works.
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