Question

Sorry to hijack the topic with a question, but can anyone explain why when the battery has adequate charge overnight, we still get these blips of energy being imported from the grid. Is it inevitable and therefore acceptable with the way the hybrid inverter works? It’s a Foxess just fyi. Thank you.


Your post has been split from the one you hi_jacked

at a rough guess, something like the fridge is turning on and the inverter isn't responding quite fast enough. Those blips are only around 20 Watts

Thank you Binky. X

My system show the same and mine was fridge.it was a newish Samsung American fridge. We have since put it on a timer so it goes off now at midnight and comes back on at 6am and so noticed blip gone within them hours.

Gian said:

My system show the same and mine was fridge.it was a newish Samsung American fridge. We have since put it on a timer so it goes off now at midnight and comes back on at 6am and so noticed blip gone within them hours.

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Good idea, I might consider doing the same.

Won't it take a lot more than 20W to get back down to temperature after being off for 6 hours ?

Considering buying a timer, plus the risk of its failure destroying your stored food I'm not sure that you have a worthwhile idea there.

Just saying: It is recommended a fridge with its door shut is safe to leave with no mains for only 4 hours, not 6, a half full freezer on the other hand 18+ hours no problem.

I guess you could always try it, by putting in a thermometer, and checking 4 hours later

michael8554 said:

Won't it take a lot more than 20W to get back down to temperature after being off for 6 hours ?

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Leaving it off for 6 hours will be cheaper. Like turning heating off overnight the losses will be less. (Not sure losses is the right word for a fridge but I know what I mean).

On the other hand it may get too warm and spoil the food.

So you’d seriously risk spoiling a freezer of food for the cost of a couple of minimal energy spikes.
You are either very tight, which given you've just spent thousands on solar is unlikely so must just be illogical?

BorisJ said:

Leaving it off for 6 hours will be cheaper. Like turning heating off overnight the losses will be less. (Not sure losses is the right word for a fridge but I know what I mean).

On the other hand it may get too warm and spoil the food.

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really doesn't ssound like it's worth the bother for a few pence of leccy.

Geoff1946 said:

Considering buying a timer, plus the risk of its failure destroying your stored food I'm not sure that you have a worthwhile idea there.

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Let you know the cost of saving in another 8 months. We have quite a few power cut in my area and these appliances are good for 12 plus hours in a power cut. At the times they are off they are not opened and closed as we are all asleep.

Richard-the-ninth said:

Just saying: It is recommended a fridge with its door shut is safe to leave with no mains for only 4 hours, not 6, a half full freezer on the other hand 18+ hours no problem.

I guess you could always try it, by putting in a thermometer, and checking 4 hours later

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The manufacturers state 24 hours max. We have had longer power cuts anyway.

Sharpend said:

So you’d seriously risk spoiling a freezer of food for the cost of a couple of minimal energy spikes.
You are either very tight, which given you've just spent thousands on solar is unlikely so must just be illogical?

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Solar works in day not night. We look at all areas of saving and this one is sound , it may not sound logic but after 8 months I will have proper figures and I can then come back and say it's worked or come back and say the timers failed and i lost all my meat lol. It's always a positive not a negative and it's really good that we all have an input regardless of of views. My electricity bill per year is £670 with solar and batteries ,I always am looking at differant ways to reduce this.with electricity increasing its good to look at saving. Saving by even going back to fitting secondary glazing with double glazing which is another way I have cut down my gas bill.

Would the fridge after been off for 6hrs loose it’s core temperature and then when coming back on have to use more energy to get back to it. More then the spikes
Just asking

Sharpend said:

So you’d seriously risk spoiling a freezer of food for the cost of a couple of minimal energy spikes.
You are either very tight, which given you've just spent thousands on solar is unlikely so must just be illogical?

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I always try and support what I talk about so this is from Bosch You should keep the doors of your fridge and freezer closed after power cut. 2. Food can remain fresh up to four hours in a refrigerator, 48 hours in a full freezer, and 24 hours in a half freezer.

So Freezer food is good, But what about the food in the fridge?

Geoff1946 said:

Considering buying a timer, plus the risk of its failure destroying your stored food I'm not sure that you have a worthwhile idea there.

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A timer contains a motor or electronics and uses electricity itself.

peterspurs said:

Would the fridge after been off for 6hrs loose it’s core temperature and then when coming back on have to use more energy to get back to it. More then the spikes
Just asking

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Leaving it off for 6 hours will be cheaper. Like turning heating off overnight the losses will be less. (Not sure losses is the right word for a fridge but I know what I mean).

BorisJ said:

Leaving it off for 6 hours will be cheaper. Like turning heating off overnight the losses will be less. (Not sure losses is the right word for a fridge but I know what I mean).

Click to expand...

how well a fridge of freezer stays cool is also dependent on how much stuff you have inside it, ie the total thermal mass. A higher mass works better, I understand, and can be more efficient. I seem to remember seeing something about putting containers of water into half empty freezers for this very reason. So the energy used to re-cool the fridge after being left off for a number of hours is probably linked to the thermal mass contained within.