question

nicknack avatar image
nicknack asked

Startup Multiplus load

Hey everybody,

I've finally build an electronic controller for my fridge and now I can see via MQTT when the fridge compressor is on or not.

So now I have programmed in node-red that the inverter of the Multiplus goes out when the fridge isn't cooling and comes back on when the fridge needs power to cool.

I have 2 questions, is it bad for the multiplus to cycle its inverter on/off for ~1 or ~2 times an hour? Is it okay for the Mutiplus to start inverting with a load on it's output (the fridge)?

It's a Multiplus 12/1600/70-16 and the fridge uses around 60W when running. Startup power is of course way higher.

Kind regards,

NickNack

multiplus ve.bus
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2 Answers
Alexandra avatar image
Alexandra answered ·

@NickNack

It would be better to have a way to trigger AES mode rather than switch off the inverter.if you are trying to save power.

It is not great for the inverter to start up with a load particularly a compressor load.

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nicknack avatar image nicknack commented ·

Thanks for your answer!

The problem with AES mode is that you need at least 15W or so (I don't know the exact number). I used to use AES, but sometimes I use a load smaller then the smallest possible value (anti-mosquito thing), so the inverter didn't start up. That's why I don't like to use it.


If I program a delay, like 10 seconds, between the startup of the inverter and the fridge, would that be enough?


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some-user answered ·

Don't have answers but interested; are you using the "zero load power in search mode"? Or just turning of the inverter?

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nicknack avatar image nicknack commented ·
I turn the inverter on and ff to get maximum energy savings.
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