Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-01-2020, 06:18   #1
Registered User
 
mrybas's Avatar

Join Date: May 2010
Location: East Coast USA or out cruising
Boat: Lock Crowther 150
Posts: 594
Using 1800W induction cooktop with 400 AH LifePO

Hi,
I want to use an induction cook top as it will allow me to get rid of propane.
I’m not cooking any lengthy meals, mostly heating water for coffee in the morning and frying a piece of fish or rice in the evening. Not more than an hour use in a day.
Would an 1800W (highest setting) induction cooktop ran through a 3000W inverter and powered by a 400AH LifePO battery be sufficient?

My quick math says it should work, but looking for advice from those with experience with LifePO and induction cooking.

1800W/12V= 150amps
150A x 1hr = 150 AH
__________________

mrybas is offline   Reply With Quote
Old 28-01-2020, 06:36   #2
Registered User
 
Wood's Avatar

Join Date: Feb 2016
Location: Portsmouth, NH
Boat: Bayliner, 4588, 45'
Posts: 151
Re: Using 1800W induction cooktop with 400 AH LifePO

I've got a dual burner induction cooktop. Nominally 1800w gross but actually around 1650w max - so you may want to actually check. It works fine on a 2500w modified sine wave inverter.

I just ordered 550AH LiFePO4. I doubt I would have the burners on for more than 15 minutes or so. YMMV.
__________________

__________________
Irony
4588 Bayliner
Portsmouth, NH
Wood is offline   Reply With Quote
Old 28-01-2020, 06:55   #3
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 27,522
Re: Using 1800W induction cooktop with 400 AH LifePO

Which inverter? And batteries 400 AH * 12v or what?


At first glance, you should be fine.


I am even as I write this cooking a meal on an induction hob off my Victron 3000VA (note well -- those are not watts) Multiplus. I have 420 AH * 24v of lead batteries, so usable power similar to yours (if I'm right in assuming you are 12v).

My hob is a NuWave with settings of 800, 1300 and 2000 watts. For 95% of all cases, the medium setting, then reduced to low, is perfectly adequate. The inverter will run the hob at 2000 watts but it's rarely needed. I even run two of these at the same time off the inverter; you just have to be a little bit careful with the wattage settings.


For boiling water, I suggest an electric kettle. More convenient then boiling on the induction hob and no less efficient.
__________________
"Parce que je suis heureux en mer, et peut-être pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Old 28-01-2020, 07:29   #4
Registered User

Join Date: Aug 2016
Location: In the Atlantic
Boat: Prout Snowgoose 35
Posts: 1,479
Re: Using 1800W induction cooktop with 400 AH LifePO

The batteries are the important thing. They need to be able to handle the discharge current without causing damage. The spec sheet should tell you what that max continuous discharge rate is.

A 3000w inverter will have no problem at all with a 1800w induction cooktop.

It might be worth check though if your induction cooktop uses inverter technology. Many don't so when you cook at half power rather than using 900w, it uses 1800w but only half the time. It's an old inefficient way of cooking.
mikedefieslife is offline   Reply With Quote
Old 28-01-2020, 08:17   #5
Registered User
 
mrybas's Avatar

Join Date: May 2010
Location: East Coast USA or out cruising
Boat: Lock Crowther 150
Posts: 594
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mikedefieslife View Post
The batteries are the important thing. They need to be able to handle the discharge current without causing damage. The spec sheet should tell you what that max continuous discharge rate is.

A 3000w inverter will have no problem at all with a 1800w induction cooktop.

It might be worth check though if your induction cooktop uses inverter technology. Many don't so when you cook at half power rather than using 900w, it uses 1800w but only half the time. It's an old inefficient way of cooking.


Click image for larger version

Name:	IMG_2111.jpg
Views:	79
Size:	76.7 KB
ID:	207718
The battery is rated for 200A continuous discharge 400 peak.
mrybas is offline   Reply With Quote
Old 28-01-2020, 08:27   #6
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Boat: Bestevaer.
Posts: 12,068
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mikedefieslife View Post
The batteries are the important thing. They need to be able to handle the discharge current without causing damage.
Replacing the power consumed is also critical. Make sure you do the sums and can produce more than you will be using.

The battery bank does not produce power it only stores power.
noelex 77 is offline   Reply With Quote
Old 28-01-2020, 08:29   #7
Registered User
 
mrybas's Avatar

Join Date: May 2010
Location: East Coast USA or out cruising
Boat: Lock Crowther 150
Posts: 594
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by noelex 77 View Post
Replacing the power consumed is also critical. Make sure you do the sums and can produce more than you will be using.



The battery bank does not produce power it only stores power.


800W of solar and upgrading to an externally regulated alternator (100-150 Amp)
mrybas is offline   Reply With Quote
Old 28-01-2020, 08:34   #8
Moderator
 
Adelie's Avatar

Join Date: Feb 2010
Location: La Ciudad de la Misión Didacus de Alcalá en Alta California, Virreinato de Nueva España
Boat: Cal 20
Posts: 10,323
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mrybas View Post
Hi,
I want to use an induction cook top as it will allow me to get rid of propane.
I’m not cooking any lengthy meals, mostly heating water for coffee in the morning and frying a piece of fish or rice in the evening. Not more than an hour use in a day.
Would an 1800W (highest setting) induction cooktop ran through a 3000W inverter and powered by a 400AH LifePO battery be sufficient?

My quick math says it should work, but looking for advice from those with experience with LifePO and induction cooking.

1800W/12V= 150amps
150A x 1hr = 150 AH


3000w inverter will be fine as long as it’s a pure sine model. A modified sine wave may or may not work depending on the model of induction hob and model of inverter.

I did some testing of a hob and based on that I figured about 50amp-hr per day using it for moderate cooking 3 meals per day. You should be fine since you will be using it less.
__________________
Num Me Vexo?
A house is but a boat so poorly built and so firmly run aground no one would think to try and refloat it.
Adelie is offline   Reply With Quote
Old 28-01-2020, 08:42   #9
Registered User

Join Date: Nov 2019
Posts: 1,302
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mrybas View Post
Hi,
I want to use an induction cook top as it will allow me to get rid of propane.
I’m not cooking any lengthy meals, mostly heating water for coffee in the morning and frying a piece of fish or rice in the evening. Not more than an hour use in a day.
Would an 1800W (highest setting) induction cooktop ran through a 3000W inverter and powered by a 400AH LifePO battery be sufficient?

My quick math says it should work, but looking for advice from those with experience with LifePO and induction cooking.

1800W/12V= 150amps
150A x 1hr = 150 AH

Don’t have any comment on your battery inverter installation

Concerning the induction cooktop...they are fantastic

When seating your cooktop be sure that the underside of the cooktop..the location of all the magic little electronic gizmos ..is well ventilated...perhaps even force air ventilated

When overheated these gizmos fail
slug is offline   Reply With Quote
Old 28-01-2020, 09:53   #10
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Boat: Bestevaer.
Posts: 12,068
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mrybas View Post
800W of solar and upgrading to an externally regulated alternator (100-150 Amp)
A lot depends where you will be cruising. We have just over 1000w of solar in a very unshaded location together with a (derated) 175A 24v alternator.

We can use induction cooking for some of time, but it is certainly not viable in all locations and seasons, at least without running the engine just for battery charging, which is something personally I don’t want to do.

Of course your energy budget will be completely different, but make sure you do the sums. Electric cooking can use considerable amounts of energy and that energy has to be produced.
noelex 77 is offline   Reply With Quote
Old 28-01-2020, 10:04   #11
Registered User

Join Date: Aug 2016
Location: In the Atlantic
Boat: Prout Snowgoose 35
Posts: 1,479
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by noelex 77 View Post
Replacing the power consumed is also critical. Make sure you do the sums and can produce more than you will be using.



The battery bank does not produce power it only stores power.


Yes but that’s as obvious as needing to drink water. The op didn’t ask about charging. When he does than that can be addressed in a more relevant ‘charging LiFePO4 batteries’ thread.
mikedefieslife is offline   Reply With Quote
Old 28-01-2020, 10:30   #12
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Boat: Bestevaer.
Posts: 12,068
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by mikedefieslife View Post
Yes but that’s as obvious as needing to drink water.
Well, many cruisers when planning their systems get this detail wrong.

We are told that some humans, even in the developed world, don’t drink enough water for good health, so perhaps your analogy is accurate .
noelex 77 is offline   Reply With Quote
Old 28-01-2020, 10:45   #13
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 27,522
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by noelex 77 View Post
Well, many cruisers when planning their systems get this detail wrong.. . .

Yes, getting this right demands either careful planning, or a big-ass generator with a big charger attached to it
__________________
"Parce que je suis heureux en mer, et peut-être pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Old 28-01-2020, 13:05   #14
Moderator
 
Adelie's Avatar

Join Date: Feb 2010
Location: La Ciudad de la Misión Didacus de Alcalá en Alta California, Virreinato de Nueva España
Boat: Cal 20
Posts: 10,323
Re: Using 1800W induction cooktop with 400 AH LifePO

Quote:
Originally Posted by Dockhead View Post
Yes, getting this right demands either careful planning, or a big-ass generator with a big charger attached to it


No it doesn’t.

For most couples 1 extra 100ah battery and an extra 160w panel with an MPPT controller will handle their needs.

A Honda EU2200 could directly power the hob or a reasonably sized charger for the batteries.
__________________
Num Me Vexo?
A house is but a boat so poorly built and so firmly run aground no one would think to try and refloat it.
Adelie is offline   Reply With Quote
Old 28-01-2020, 15:13   #15
Registered User

Join Date: Sep 2007
Location: Queensland, Australia
Boat: None at present--between vessels. Ex Piver Loadstar 12.5 metres
Posts: 1,180
Re: Using 1800W induction cooktop with 400 AH LifePO

Yes. That will not be your problem though--you will need to charge those batteries--
__________________

Mike Banks is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wow - Induction Cooktop nfbr Electrical: Batteries, Generators & Solar 212 05-01-2020 00:47
Induction cooktop and pan comparison ohthetrees Provisioning: Food & Drink 52 14-11-2019 19:04
Whirlpool Induction cooktop only half works on inverter brightontrader Electrical: Batteries, Generators & Solar 30 28-02-2015 01:37
Eno Gas Stove - How Do I Unscrew Cooktop ? MarkJ Plumbing Systems and Fixtures 23 19-02-2015 18:47
Induction Cooktop Kenomac Liveaboard's Forum 64 08-11-2014 10:07

Advertise Here


All times are GMT -7. The time now is 18:32.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.