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Old 07-10-2016, 06:42   #106
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Re: Most efficient way to boil water on a boat

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If I'm not mistaken, another problem with low-windage solar installations is shading, which wrecks the efficiency of normal solar installations, but not if you use individual controllers for multiple panels, is that right?
2 good way to mitigate shading issues on a boat:

1) Wire Solar Panels in parallel to 1 mppt controller
2) Have a separate controller for each Solar Panel

If you have different size panels with different voltages, then its best to wire them in series to 1 mppt controller.
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Old 07-10-2016, 07:04   #107
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Re: Most efficient way to boil water on a boat

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Originally Posted by Cotemar View Post
2 good way to mitigate shading issues on a boat:

1) Wire Solar Panels in parallel to 1 mppt controller
2) Have a separate controller for each Solar Panel

If you have different size panels with different voltages, then its best to wire them in series to 1 mppt controller.
Thanks. That's useful.
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Old 07-10-2016, 10:09   #108
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Re: Most efficient way to boil water on a boat

Sailor chic, what's the conversion numbers for 'a hair less 'to 'hill of beans' and are those units SAE or metric? :in the interests of technical accuracy as some of us are trying to learn from this thread. My own interests concerning efficiency are somewhat different from the other posters here . Boiling water for morning coffee could include shooting the deer on the beach,row ashore ,light fire ,place pot, skin and gut deer, dig a few clams, pick some berries ,row back with stash and pot. Brew and enjoy. Use big thermos for later. So by doubling up on activities the efficiency numbers of boiling water can be quite astounding while saving at least 2 pop can refunds of propane
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Old 07-10-2016, 11:57   #109
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Re: Most efficient way to boil water on a boat

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I did say the Electric Kettle was $20 right.

Is $20 a lot of money?
Be aware that the electric kettle is a 1500 watt appliance and a suitable sized inverter is needed.
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Old 07-10-2016, 11:59   #110
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Re: Most efficient way to boil water on a boat

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Be aware that the electric kettle is a 1500 watt appliance and a suitable sized inverter is needed.
Actually most of them are more than 2kW.

Much better for use on board are the 1 liter, 800 watt to 1000 watt ones. Larger ones may take disproportionate charge out of your battery due to Peukert. N.B.!
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Old 07-10-2016, 13:16   #111
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Re: Most efficient way to boil water on a boat

At approximately $.01 in fuel cost to boil a cup of water, it would take a lifetime or more to recoup the cost of solar panels, controllers, batteries and an inverter.


It seems that if you can afford the coffee, you should be able to afford to heat the water.
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Old 07-10-2016, 13:50   #112
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Re: Most efficient way to boil water on a boat

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At approximately $.01 in fuel cost to boil a cup of water, it would take a lifetime or more to recoup the cost of solar panels, controllers, batteries and an inverter.


It seems that if you can afford the coffee, you should be able to afford to heat the water.
Assuming the only electric thing on your boat is the kettle. Makes sense.
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Old 07-10-2016, 17:26   #113
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Re: Most efficient way to boil water on a boat

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At approximately $.01 in fuel cost to boil a cup of water, it would take a lifetime or more to recoup the cost of solar panels, controllers, batteries and an inverter.


It seems that if you can afford the coffee, you should be able to afford to heat the water.
Ron you really need to stop nit picking . Heating water via electric provided by solar via the batteries is just one little piece of the equasion .
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Old 07-10-2016, 17:59   #114
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Re: Most efficient way to boil water on a boat

I don't know if this was asked. The Hamilton beach 4099 is a 1500 watt kettle. They make 750 and 1000 watt kettles also.
Does a 750 watt kettle take twice as long to boil the water? I'm guessing the energy usage would be the same or close? I know our electric coffee maker pulls about 90 amps but only for about 5-7 minutes.
Wanting a more efficient kettle. Is there benefit to a 750 vs 1000 vs the 1500? We only have a 2000 watt inverter.

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Old 07-10-2016, 18:28   #115
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Re: Most efficient way to boil water on a boat

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I don't know if this was asked. The Hamilton beach 4099 is a 1500 watt kettle. They make 750 and 1000 watt kettles also.
Does a 750 watt kettle take twice as long to boil the water? I'm guessing the energy usage would be the same or close? I know our electric coffee maker pulls about 90 amps but only for about 5-7 minutes.
Wanting a more efficient kettle. Is there benefit to a 750 vs 1000 vs the 1500? We only have a 2000 watt inverter.
Our electric Kettle is 1500 watts and we have a 2000 watt inverter. All works well.
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Old 07-10-2016, 18:33   #116
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Re: Most efficient way to boil water on a boat

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Originally Posted by Dulcesuenos View Post
I don't know if this was asked. The Hamilton beach 4099 is a 1500 watt kettle. They make 750 and 1000 watt kettles also.
Does a 750 watt kettle take twice as long to boil the water? I'm guessing the energy usage would be the same or close? I know our electric coffee maker pulls about 90 amps but only for about 5-7 minutes.
Wanting a more efficient kettle. Is there benefit to a 750 vs 1000 vs the 1500? We only have a 2000 watt inverter.

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Oddly the higher wattage element would use a bit less power. This mainly due to the extraheat loss from the pot for the double amount of time it would take at 750 watts. But then the Peukert factor might make it a wash, if using batteries.
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Old 07-10-2016, 18:55   #117
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Re: Most efficient way to boil water on a boat

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Ron you really need to stop nit picking . Heating water via electric provided by solar via the batteries is just one little piece of the equasion .
Or, you could recognize how ridiculous this entire thread is and see the sarcasm.
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Old 07-10-2016, 22:59   #118
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Re: Most efficient way to boil water on a boat

I agree that an electric kettle is the way to go for efficiency. But that long extension cord really slows the boat down.
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Old 07-10-2016, 23:48   #119
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Re: Most efficient way to boil water on a boat

I like this topic Cotemar, have you run any efficiency numbers for using a nice single induction cooktop? According to the press these are the most efficient means of turning electric into heat.
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Old 08-10-2016, 00:34   #120
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Re: Most efficient way to boil water on a boat

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I like this topic Cotemar, have you run any efficiency numbers for using a nice single induction cooktop? According to the press these are the most efficient means of turning electric into heat.
The most efficient would be a big metal washer dropped inside a well insulated mug.

I think this was discussed a year or so ago here
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