Ignore ACin with "Inverter only"-Mode?

Q&A and troubleshooting
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Hi Everyone,

Ideally I want to find a possiblity to physically “switch off” my ACin via NodeRed for my MP2.

A quick search resulted in that the “Inverter only”-mode might be a solution.

Do you know if this mode switches the ACin-relay?
What happens if my ACout connected PV-inverter delivers more energy than consumed at this time? Will the MP2 charge the battery or will go into frequency shift?

If you have smart alternatives I would appreciate if you would share your thoughts.

Thanks a lot in advance!

BR, Niklas

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Yes it does. You will hear it disconnect

It will charge the battery.

It will do this if the battery is full and needs to throttle to load.

There are other options for control but if frequency shifting works there is no need.

This can be done manually through the gx interface as well. But obviously if you want to automate it then use node red.

2 Likes
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@lxonline thank you very much for your quick and precise response! :slight_smile:

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Hi

Ignore AC In Virtual switch & inverter only mode are two different things from what I understood, but at the end, they achieve both the same result for the user: disconnecting from grid (so no more inject/reject from/to grid).

As I’m using Node Red to control my Multiplus 2 behavior, I switch between ON and Inverter Only modes, depending on conditions (basically to get some feed/charge from grid or to be totally offline).

When in Inverter mode only, I have a “high demand load” monitoring flow in place: over a certain load power request lasting for a given amount of time, I switch to ON mode and limit inverter power, to mostly supply the loads by grid, supported a bit by solar/battery (so basically, a kind of reverse of the Power Assist mode :)). Once load demand is over (below a certain power during a certain period), then I go back inverter only mode.

With the Inverter Only mode, grid voltage remains monitored. I take benefit of this with a Nodered monitoring flow for the grid voltage, which sends me a warning in case of (unlikely for where I live) grid shutdown.

Matt

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Thanks Matt also for your reply!

After integrating a new additional battery on the weekend I found the time for node-red in the meanwhile. Works excellent! My use case is more like a “last line of defence” one. For the case the lowest cell of the battery packs drops below a certain threshold (which happens only if the standard charging process fails), the ACin kicks in and supports a quick recharge and/or avoids a shut off of the system.

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:+1:

I have such security monitoring flow in place as well: below 7% or pack below 49v.

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