How many amps

[TCG]

am i reading this correctly... does it really use so few amps. i am hoping to use this via my inverter, How many amps will it require

thanks

 

[Lenny HB]

17 amps at 12v + 10% for inverter inefficiency so 19 amps, if it's a cheap inverter allow 15%.

 

[funflair]

Call it 20A from your 12v.

 

[TCG]

So i wasn't reading it correctly then I thought it was less that 1 amp (0.85A)

 

[TCG]

17 amps at 12v + 10% for inverter inefficiency so 19 amps, if it's a cheap inverter allow 15%.

Really impressed with that quick answer Lenny. can you please explain for us numpties how you work that out

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[Guigsy]

So i wasn't reading it correctly then I thought it was less that 1 amp (0.85A)

1 amp at 230v. So on the other end of your invertor, it'll pull 12v and nearer 20 amps.

 

[Lenny HB]

Really impressed with that quick answer Lenny. can you please explain for us numpties how you work that out

Just multiply the current by 20 (240 / 12 =20).

 

[TCG]

1 amp at 230v. So on the other end of your invertor, it'll pull 12v and nearer 20 amps.

thanks a bit too heavy to run that 24hrs per day

 

[Guigsy]

thanks a bit too heavy to run that 24hrs per day

230v x 0.85 amps (plus ~10% for the inefficiency of the invertor) = 220 watts
So it's a large, but not impossible power draw.

My brother takes a similar ice maker camping. He runs it for an hour or so in the late afternoon after the solar has charged the batteries. There's then enough ice for that evening's drinks. He does have quite a lot of solar panel though.

 

[TCG]

230v x 0.85 amps (plus ~10% for the inefficiency of the invertor) = 220 watts
So it's a large, but not impossible power draw.

My brother takes a similar ice maker camping. He runs it for an hour or so in the late afternoon after the solar has charged the batteries. There's then enough ice for that evening's drinks. He does have quite a lot of solar panel though.

Thanks, that explains a lot
I have 200 ah of lithium and 300 wats solar. I was hoping to take it to the Norfolk show to keep the G&T cold... but a bag of ice it is then (If i can buy one)

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[Guigsy]

Thanks, that explains a lot
I have 200 ah of lithium and 300 wats solar. I was hoping to take it to the Norfolk show to keep the G&T cold... but a bag of ice it is then (If i can buy one)

If it's sunny (which will correlate with the G&T requirement), you'll probably find that with 300w, your lithiums will be pretty much charged by late morning. Those photons will be going to waste. You could probably switch the ice maker on and run it until mid afternoon and still have your batteries maxed for the evening. Personally, I'd take it and try it.

 

[Richard n Ann]

am i reading this correctly... does it really use so few amps. i am hoping to use this via my inverter, How many amps will it require

thanks

Best thing to do is just try test running it. My little work top freezer runs at 4 amps off the 12v battery in the shed.
I'm guessing your fridge is a small one by only having 26g of refrigerant in it so it might be even less.

One thing to note is the start up current on fridge compressors is much higher than what they run at so you'll need an over spec inverter, mine is 475w and I was surprised it started the freezer.

 

[makems]

How many amps?

LOTS!

 

[Wh05apk]

Can you not just have an ice tray in your freezer?

 

[IRHP]

So i wasn't reading it correctly then I thought it was less that 1 amp (0.85A)

I (AMPS) = P(WATTS)/V (VOLTS).
POWER is constant so as the volts come down the current draw(amps) goes down

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[TCG]

Can you not just have an ice tray in your freezer?

Yes but i dont want to

 

[IRHP]

Of course I meant the amps goes up

 

[autorouter]

I (AMPS) = P(WATTS)/V (VOLTS).
POWER is constant so as the volts come down the current draw(amps) goes down

POWER is constant so as the volts come down the current draw(amps) goes UP.

230v x 0.85 amps (plus ~10% for the inefficiency of the invertor) = 220 watts

So at 12v, 220W would require 220 / 12 = 18A.

About 20 times less voltage, so about 20 times more amps, for the same power.

 

[Richard n Ann]

POWER is constant so as the volts come down the current draw(amps) goes UP.

Only if you've got a voltage regulator, usually with a lower voltage supply the element will consume less power... But you already know that of course