question

ludo avatar image
ludo Suspended asked

strange behavior of multiplus current limiter

screenshot-20220616-140333.pngThe input current remains the same, regardles of the setting on the multi control panel


screenshot-20220616-140243.png

the actual load is 10.25A, with the limiter set to 11A the support function should not be active.

On a campsite witha 5A circuit breaker i woul have a real problem.


MultiPlus Quattro Inverter Charger
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9 Answers
marc-heide avatar image
marc-heide answered ·

Hello,


P = U x I


Assuming you have 230v x 10 A you will need to draw more than 2300 watt to limit the shore power.


Your now drawing 6 amps from the shore with 1400 watts.


With kind regards,

Marc van der Heide

Www.marces.nl

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ludo avatar image ludo commented ·
the third screenshot shows the limit set to 5A, to no avail.........
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ludo avatar image
ludo answered ·

Hi Marc,


sorry, the system is telling me I am drawing 10.25A in the "detail" view, so are we calculating/measuring VA or Watts ?

But even if I change the settings in the Multiplus nothing happens


unbenannt.jpg

Set to 5A, happily drawing 8.8 ;)


best regards


Ludo





unbenannt.jpg (67.4 KiB)
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ludo avatar image
ludo answered ·

More data :

unbenannt.jpg

same load situation, same current, different power shown

Actually the power doesn't really matter to me, but the current-limiter should work regardles.


best regards


Ludo



unbenannt.jpg (16.5 KiB)
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ludo avatar image
ludo answered ·

Now it seems the problem only exist when a large inductive load is present (air conditioner).

With a resistive load (multiple water heaters) all is well.

I guess its clearly a design problem of the multiplus................

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ludo avatar image
ludo answered ·

@Matthias Lange - DE : do you have an idea where my problem could be ?

thx

Ludo


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marekp avatar image
marekp answered ·

@Ludo

Maybe your MP does not know the current on AC-in because the internal CT is disconnected by faulty 3.5mm jack used for external CT.

Maybe "3.5mm jack trick" will work for you.

https://community.victronenergy.com/questions/136049/critical-load-shows-high-values-how-can-i-check-th.html

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ludo avatar image
ludo answered ·

Sorry, good hint, but I have a multiplus without "2". And it works as long as the load is not inductive.


Best regards


Ludo

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ludo avatar image
ludo answered ·

I updated the firmware from 2609430 to 2609497, now everything looks fine, at least or the last 30 minutes ;)

Sadly enough VEConfigure said my firmware was up to date, I should have checked earlier

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ludo avatar image
ludo answered ·

The unit still didn't bring down the current to 5 Amps when running with the aico's,

so now I installed the oldest firmware version available for my device : 2609159 and now all my problems seem to have vanished.

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Jeff Jensen avatar image Jeff Jensen commented ·

I believe your not alone.

https://community.victronenergy.com/questions/16260/multiplus-not-using-full-shore-power-limit.html


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