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  #141  
Old 03-31-2014
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Re: safe cooking

Out of mild curiosity, what is the amp draw on an induction stove-top? I am assuming that this set up would mean an electric oven too? I like my propane (but then again, I cook with gas at home). Never once have I had a flare-up like when I had an alcohol stove and singed the cabin curtains. We used to have a paraffin trawler lantern in the cabin but got tired of the oily film and soot on the overhead if it wasn’t adjusted properly. But, I can see where propane or electric might not be practical for Jack’s boat and budget. Get what you can afford and take proper precautions and enjoy your boat.
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  #142  
Old 03-31-2014
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Re: safe cooking

George,

I'm not an electrician. I believe with a typical 110v, 15 amp circuit, the absolute maximum deliverable wattage would be around 1800w. I believe that's why most of the portable units on the market are 1500 watts. I hope I've stated that correctly. One would need a dedicated circuit for each 1500 watt unit.
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  #143  
Old 03-31-2014
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Re: safe cooking

Quote:
Originally Posted by GeorgeB View Post
Out of mild curiosity, what is the amp draw on an induction stove-top? I am assuming that this set up would mean an electric oven too? I like my propane (but then again, I cook with gas at home). Never once have I had a flare-up like when I had an alcohol stove and singed the cabin curtains. We used to have a paraffin trawler lantern in the cabin but got tired of the oily film and soot on the overhead if it wasn’t adjusted properly. But, I can see where propane or electric might not be practical for Jack’s boat and budget. Get what you can afford and take proper precautions and enjoy your boat.
George... it sounds like you're a little curious and you should be. My induction stove is super efficient... why?... one simple reason... it draws only the amount of electricity it needs in an instant to heat water or whatever... uses only the power it needs and nothing else... unlike an electric stove with resistance heating it must warm up... ever plug in a soldering iron waiting for it to heat up or an iron, etc.... that is the resistance element heating up and must be at full power to get to proper heat... that is wasting a lot of wattage right there... not so with the induction stove... it's electronic and turns on and off as needed to maintain the temperature.... your electric stove is on all the time at at set control timing.

That really is the difference... it uses very little wattage!

And to Tempest it ran on a 2000 watt pure sine wave inverter but I wanted power for other items so exchanged it with a 3000 watt pure sine wave inverter... works beautifully if may say so. My added plus is I'm not buying $12.00 a gallon of alcohol or the danger of an alcohol spill or fire!

Jack would need an alcohol stove or whatever he likes... my induction stove is not the cheapy units you see advertised on TV and is a chef/restaurant heavy duty quality unit and wired to the inverter with heavy 30 amp cabling... and inverter cables to the batteries are marine grade heavy duty cables. Not cheap for the faint of heart on a budget... the inverter alone was almost $800.

Last edited by guitarguy56; 03-31-2014 at 08:25 PM.
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  #144  
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Re: safe cooking

So, am I calculating this correctly? at 1,500 watts, my draw would be 125 amps? So a simple 15 minute meal would "cost" my electical system 31 Amp hours? This would certainly tax my two 4D house bank.
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  #145  
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Re: safe cooking

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Originally Posted by GeorgeB View Post
So, am I calculating this correctly? at 1,500 watts, my draw would be 125 amps? So a simple 15 minute meal would "cost" my electical system 31 Amp hours? This would certainly tax my two 4D house bank.
Math is wrong... it should be 1500/60 minutes or 25 watts per minute... not 1500 watts per minute... appliances are rated per hour usage... so for one hour of the induction stove use it will use 1500 watts... problem is it's not running 1 hour... but 5-10 minutes at the most... so 5*25 = 125 watts power used... 10 minutes is 250 watts, etc... pretty simple... there are numerous power/wattage calculators that will tell you based on how much power the appliance is using... your figure would mean a 1500 watt heater in the cabin is also using 121 amps too... how can that be George? Shore power is only 30 amps!

You must be asking how much amps is it using... 1500 watts/ 110 volts = 13.6 amps per hour... so based on that 5 minutes usage is: 1.136 amps... 10 minutes of usage is: 2.272 amps.

That is the total power being drawn from the battery +/-.

Clear now?

Last edited by guitarguy56; 03-31-2014 at 08:48 PM.
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  #146  
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Re: safe cooking

Guitarguy, when I do the math your way, I still come up with 31 Amp hours per 15 minute "meal". I am not so much concerned when I am tied up to the dock but for the times I am "off the grid". Like outbound, my biggest headache is those at sea days when my navigation system, radio and lights are a major consumer of my house bank. for example, my sensors "cost" me 48 AH per 24 hours, and the chartplotter another 60. My housebank only has a usable capacity of 150 - 160 AHs and my solar panel isn't the most efficient with the boat rolling and yawing.
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  #147  
Old 03-31-2014
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Re: safe cooking

I think your math is wrong guitar guy. The amperage on the DC side of the inverter is going to be a little higher.
Georgeb is correct.
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  #148  
Old 03-31-2014
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Re: safe cooking

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Originally Posted by Boredop View Post
I guess the point becomes that there are a variety of safety hazards onboard. You could sink, catch fire, receive a blow to the head, inhale toxic gases or choke on a olive. I think the danger of propane is very low compared to the other dangers onboard. Propane has a distinctive indicating smell and with certain precautions can be handled safely. An accidental jibe because of a wind shift has more potential to injure myself or my guests. If the world scares you, stay home.
a person could use that argument against a person that thinks a motor is a necessary piece of safety equipment on a sailboat. do you happen to have a motor?

and, i'm willing to bet you have the usual boat load of technological gadgets on your boat. sailing without GPS and all the rest just wouldn't be safe, would it?

but, because i want to choose the safest fuel to use in my bloody stove that means i am too scared to sail so i better pack up and go home?

to quote don casey: "On a boat, LPG is also, by far, the most dangerous cooking fuel. "

check it out:
i built my own chopper. it has no front brakes. no rear shocks. a rake of 50 degrees. and a right hand suicide shifter. i love to ride at beak neck speed on twisty roads. i'm not exactly a timid guy. however, i'm not dumb enough to stick a hand grenade up my butt, with the pin pulled, and ride down the road hoping my sphincter can hold the lever in so it doesn't blow my a*# off.

give me a break.
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  #149  
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Re: safe cooking

Or does this have to do with your girlfriend again? Scared she is going to blow up the boat? Come to think of it, there are a lot of hard surfaces around too, better get out the foam padding.....

Last edited by Boredop; 03-31-2014 at 09:10 PM.
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  #150  
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Re: safe cooking

Quote:
Originally Posted by GeorgeB View Post
Guitarguy, when I do the math your way, I still come up with 31 Amp hours per 15 minute "meal". I am not so much concerned when I am tied up to the dock but for the times I am "off the grid". Like outbound, my biggest headache is those at sea days when my navigation system, radio and lights are a major consumer of my house bank. for example, my sensors "cost" me 48 AH per 24 hours, and the chartplotter another 60. My housebank only has a usable capacity of 150 - 160 AHs and my solar panel isn't the most efficient with the boat rolling and yawing.
George... let's look at it again... 1500 watt appliance running 1 hour will be 1.5 kwatts per hour... a 1500 watt appliance running on 110 volts is using 13.6 amps per hour... ask any electrical engineer, electrician, etc.... the usage of watts drops as the appliance is reduced in time per minute.

Here is a simple calculator:

Calculate the Costs to Use Electricity - WebMath

add the 1500 watts and the number of mintues... see if you don't get the same answers I shown you... you may have to convert kwatt hours to minutes to get the actual watt/minute usage.

Does it make a little more sense now?

Last edited by guitarguy56; 03-31-2014 at 09:18 PM.
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