Electric Range without a Generator?

[mako]

Adelie this is an excellent write up. One thing that I would like to add is that inductions don't run continuously, even an electric oven does not. They work on a partial duty cycle. My old one seemed to cycle half the time, on-off-on-off. Therefore the power consumed would be half as well.

PS - I just did a quick Google search and came across this article, which indicated the duty cycle to be (depending on setting): 22%-36%-46%

Induction cooker

[Adelie]

Interesting read. Would like to know what the peak draw is and what the peak wattage or whether the wattages listed are peak so average is a lot less. I’m assuming the latter because if average wattage were 2k for a 46% duty cycle, then peak watts would be over 4,000 which household wiring normally can’t carry. Of course the writer is in the UK with 220v so who knows.

When I get my power meter running on my panel I’ll check.

[mako]

Wattage rating is the maximum draw. It is not dependent on voltage. In the UK you will draw half the amps as in the USA, that's it. Curious to see why your readings show.

[StuM]

Originally Posted by makobuilders

Adelie this is an excellent write up. One thing that I would like to add is that inductions don't run continuously, even an electric oven does not. They work on a partial duty cycle. My old one seemed to cycle half the time, on-off-on-off. Therefore the power consumed would be half as well.

PS - I just did a quick Google search and came across this article, which indicated the duty cycle to be (depending on setting): 22%-36%-46%

Induction cooker

As I said recently in another thread. When my induction plate is being used to simmer, I generally have it on the 120W or 300W setting (depending on what's in the pot) and it constantly cycles. You can see bubbles start to form more aggressively for a couple of seconds and then they die down for a couple seconds. That is obviously different to the duty cycle in the link which is is microseconds. How that DC Voltage duty cycle relates to AC power consumption is a different matter.

[a64pilot]

Originally Posted by Adelie

Interesting read. Would like to know what the peak draw is and what the peak wattage or whether the wattages listed are peak so average is a lot less. I’m assuming the latter because if average wattage were 2k for a 46% duty cycle, then peak watts would be over 4,000 which household wiring normally can’t carry. Of course the writer is in the UK with 220v so who knows.

When I get my power meter running on my panel I’ll check.

Get a Kill-A-Watt meter
https://www.amazon.com/P3-P4400-Elec...s%2C227&sr=8-3

Cheap, and will tell you exactly how many watt hour and I believe AH you use, even for small appliances.
Great to know how much power say a washing machine uses as it varies according to which cycle etc.

Watching your panel, you will just still be guessing as of course it will cycle on and off, the Kill-A-Watt meter keeps exact running total.

[44'cruisingcat]

A simpler and more cost effective way to use solar power for at least some of your cooking might be a solar oven.

[Adelie]

Originally Posted by a64pilot

Get a Kill-A-Watt meter
https://www.amazon.com/P3-P4400-Elec...s%2C227&sr=8-3

Cheap, and will tell you exactly how many watt hour and I believe AH you use, even for small appliances.
Great to know how much power say a washing machine uses as it varies according to which cycle etc.

Watching your panel, you will just still be guessing as of course it will cycle on and off, the Kill-A-Watt meter keeps exact running total.

The meter I have measures total energy consumed.

Here’s a link to GoSun solar ovens:
https://www.gosun.co/collections/our...owered-cookers

[a64pilot]

Originally Posted by Adelie

The meter I have measures total energy consumed.



Here’s a link to GoSun solar ovens:

https://www.gosun.co/collections/our...owered-cookers

Yes, but does it measure energy consumed at each electrical outlet, or the total?
The Kill-A-Watt is cheap, and precise, 98% accuracy. I used it several times to know exactly what a specific item consumes.
I used to leave it plugged in cause it would display voltage and frequency, which was nice to be able to watch the generators output.
My new Blue Sea digital meters show voltage and frequency as well as amps so I don’t anymore.

Solar ovens?

[a64pilot]

Originally Posted by 44'cruisingcat

A simpler and more cost effective way to use solar power for at least some of your cooking might be a solar oven.

Just like all the electric propulsion threads don’t seem to realize best way to harness Solar power for propulsion, is Sails.

[Adelie]

My meter is on the 12v service so I get the total energy used including losses related to running the inverter.

[Adelie]

So I just saw something that give one an idea of how efficient induction cooktops are.
YT video where a cook put his home gas stove up against a $69 countertop unit he'd just bought at Costco. Gas burner used was the big 18,000BTU pot boiler. The induction unit was 1800w max since it was cord powered.
Same teakettle, same 2cups of water.
Burner took 2m30s to start whistling,
Induction took 1m30s.

[StuM]

Originally Posted by Adelie

So I just saw something that give one an idea of how efficient induction cooktops are.
YT video where a cook put his home gas stove up against a $69 countertop unit he'd just bought at Costco. Gas burner used was the big 18,000BTU pot boiler. The induction unit was 1800w max since it was cord powered.
Same teakettle, same 2cups of water.
Burner took 2m30s to start whistling,
Induction took 1m30s.

To put that into perspective. 18,000BTU/hr = 5,275W!

[a64pilot]

Efficiency is sort of irrelevant when comparing fossil fuel items on a boat as compared to electric.
It’s what the electric propulsion people love to bring up.
Reason it’s irrelevant is that a kilowatt of solar panels harvesting power all day can’t likely come up with the power in a cup full of Propane.
Now I have not run those numbers, that is purely made up, but tries to illustrate my point.

[a64pilot]

Originally Posted by StuM

To put that into perspective. 18,000BTU/hr = 5,275W!

Yes, and at 100% efficiency, 1800 W is a 150 amp drain on the batteries.

[Sand crab]

Originally Posted by StuM

To put that into perspective. 18,000BTU/hr = 5,275W!

I think a large portion of the gas fired BTUs are wasted due to heat loss around the pot. I suspect more of the induction's energy gets right to the job at hand.