Inverter question

[wingnut771]

Those generally warm up as well.

Point being an empty fridge warms up quicker than a full fridge.

 

[Progenix Oj101]

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www.makro.co.za

Read the reviews and don't buy it. Sounds like it has a lead acid battery 1 X 100AH GEL BATTERY
It won't last.

Advice return it, get something better. Do a bit of research first.

Some math with my fridge freezer (you will need to see what your aunts fridge uses)
seems to cycle every 30 minutes using
130W (max power usage) * 8 (hours of backup needed) / (2 to get a cycle of 30mins) + 4W (minpower usage) * 8 (hours of backup needed)= 536 W

That is just for the fridge/freezer, The inverter itself requires some power to run, cannot find info on what that unit draws.
Lets be generous and say 50W

50W * 8 = 400W

So that gives 536W + 400W = 936W, the 100AH gel battery 12V= 1200W (theoretically max)
If you deep discharge gel batteries you will kill it.


So what does that mean
1200W * 80% = 960W usable power

Factor in temperature and it can be even less.


So what else is plugged in ? I'm afraid that battery is probably dead.

There's a lot wrong here... You're flip-flopping between power (W) and energy (Wh).

 

[wingnut771]

There's a lot wrong here... You're flip-flopping between power (W) and energy (Wh).

We let it slide this time.

 

[Lupus]

Point being an empty fridge warms up quicker than a full fridge.

Though an overly full fridge counters that, as it restricts airflow

 

[Progenix Oj101]

Though an overly full fridge counters that, as it restricts airflow

Solids (and liquids) have more thermal mass than air, and therefore will retain the cold for longer.

 

[biena]

There's a lot wrong here... You're flip-flopping between power (W) and energy (Wh).

Ok. fix it then please.

 

[wingnut771]

Though an overly full fridge counters that, as it restricts airflow

What airflow? Im too poor for fridges with airflow.

 

[Lupus]

What airflow? Im too poor for fridges with airflow.

Unless your fridge is a vacuum there is air

 

[Lupus]

Solids (and liquids) have more thermal mass than air, and therefore will retain the cold for longer.

They will, but that's a fridge that's full but not overly full. As that restricts even the cold air from the other stuff radiating

 

[denmendez65]

Solids (and liquids) have more thermal mass than air, and therefore will retain the cold for longer.

Best being water

 

[wingnut771]

Unless your fridge is a vacuum there is air

Is it flowing?

 

[Lupus]

Best being water

Yup it really is. As you empty a fridge or freezer put in water

 

[wingnut771]

Best being water

which is why I mentioned water. Basically anything with mass really.

 

[wingnut771]

Yup it really is. As you empty a fridge or freezer put in water

Thats what I said.

 

[Lupus]

Thats what I said.

Yeah but you're a whackadoo who loves geysers so we need to clarify

 

[Dimpie (JIGSAW)]

Though an overly full fridge counters that, as it restricts airflow

What airflow ... fridge is off

 

[Lupus]

What airflow ... fridge is off

That is true, then the stagnant air

 

[vastrap1]

What airflow? Im too poor for fridges with airflow.

I'm poor enough that my fridge has ample airflow

 

[airborne]

36 easily. My kitchen had tripped 3 days before I came back from my travels in December coz of a plug left outside in the rain. The fridge still had ice. It was melting but still had ice.

Freezer yes but anything in the fridge part will be spoiled after 3 days even with no opening of the door.

 

[wingnut771]

Freezer yes but anything in the fridge part will be spoiled after 3 days even with no opening of the door.

That’s why I said to put ice packs in for the 8 hour stint.