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solshare2023 avatar image
solshare2023 asked

Programming the internal relay for AC2 output for the Multiplus 2 -12/3000

Hi all,

I'm having some trouble programming the internal relay for AC2 output for the 12/3000. I'm trying to set it up so that the inverter turns off the AC2 output for 1-2 seconds (and then turns back on) when there is a shift from either battery to AC or from AC to battery.

I've tried different combinations of programmable relay assistance and relay locker assistants, AC input, battery voltage, load output conditions, etc., but I haven't been able to get it to work.

I've noticed that the conditions set for the relays seem to work on an OR logic rather than an AND logic. I may be wrong, but I think that's what's causing the problem.

Does anyone have any experience with this? I would really appreciate any help you can offer.

Thanks

Rakib

Multiplus-IIRelayAssistants
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2 Answers
derrick thomas avatar image
derrick thomas answered ·

Pay close attention to how you program the assistants, if ANY one of the conditions are met it will trigger the response.

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iammotorhomeless answered ·

I might be wrong... but I think it executes them in order
so it's not as much OR/ AND logic
but 1, 2, 3 and back again

with that said, I have to ask, why?
I just can't see why you'd want too. Victron puts in a lot of time and effort to minimize any dropout...
but you want to make it 2 seconds long

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derrick thomas avatar image derrick thomas commented ·
Yes it does execute them in order. My point was that it will not stop at the first met condition, it will continue down the list and if any condition is met it will execute that function. This can create undesired results or end up in an endless loop if your not careful.
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solshare2022 avatar image solshare2022 commented ·
Hi, Thanks for your response. during my testing, I understood that the logics are executed from top to bottom, when I mentioned that it works on a OR logic, I meant, if in one assistant you have 2 conditions defined (Battery voltage AND AC presence), then if 1 of the 2 conditions are met, then the assistant executes rather than when BOTH conditions are met.


@IamMotorHomeless I understand Victron does spend a considerable amount of time to reduce dropouts but my system has a battery charger that seems highly sensitive to grid fluctuations, for the millisecond that the grid fluctuates during a changeover (battery to grid, grid to battery), the charger senses this and inherently stops charging and without me turning off the switch and turning it back on, it does not resume charging. Unless you have any further suggestions on how best to implement this, I am open to suggestions, the only way I figured is that I will automatically simulate this Turn ON/OFF behaviour with the AC out relay to ensure charging continues.

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