I have a system with two chargers: a MultiPlus-II and a Skylla 12/70 + Cerbo GX.
The Skylla is powered from the AC OUT of the MultiPlus-II.
If the AC IN of the MultiPlus-II is limited, PowerAssist will activate. In that case, I may end up in a situation where, in order to supply power to the Skylla, I am actually consuming energy from the battery bank.
This makes no sense: using battery power to charge the battery.
How can I avoid this situation? When the PowerAssist of the MultiPlus-II is active, I would like to set SKYLLA output current to zero.
Is there a reason why it is wired like that? Shore limit?
Why not have it rewired to the input side of the inverter?
Is it the skylla ip65?
That being said you would need node red or some other intelligent control to do something there with the current physical set up.
The flow would basically be to detect ve bus state and switch a relay wired for the remote of the skyla. I haven’t tried detecting power assist before so not sure if that is even an option.
I had the same question. Why not just wire it somewhere on or before the input side of the inverter? Then it only comes on when shore power is connected.
Also, unless your shore power is grossly under powered, my understanding is that power assist will only use battery to “temporarily” supplement large start up loads, such as air conditioners or microwaves. In my real world experience this is what I observe with power assist when I watch the inverter in operation. It only goes into “assisting” status for a few seconds when loads first come on. It will keep supplementing with battery power during longer sustained loads but this seems like something one could avoid by paying attention to what your shore power input is. I know it is the goal of many to have things automated, and I can appreciate that. It just seems like, if the Skylla MUST be wired to the output side of the inverter that you could just turn it off when you are in scenarios where shore power is weak and you want to run large loads for a sustained period of time.
One core elements of my installation philosophy is that simple is better. So you can consider the source.
Thank you very much for your posts.
I would like to connect the Skylla to the AC Out of the MultiPlus for two reasons:
I am not sure whether my AC IN (shore power) has enough capacity to supply both the SKYLLA and the MultiPlus II when connected in parallel to the same AC IN. By routing everything through the MultiPlus, this unit has the ability to “protect” the AC IN by not drawing more power than available. This way, the shore protection would not trip.
The MultiPlus II, on its AC Out, has a residual current device (RCD) to protect people. By connecting the SKYLLA to the AC OUT of the MultiPlus, it would also be protected by this RCD.
As far as i am aware no.but i don’t have one to check with.
Even though there is communication the manual explains there isn’t any external control.
Hae you looked in the menu for it on the GX? The manual says it is there for synchronisation and remote control.
But also shows an option for remoted shutdown.
You could wire it to a relay and then switch it on or off that way on the cerbo.