unit id 100…
Just click on the gray area, and it will turn into a select Field 
ok, I changed back to ‘Charger enabled’
writing /vebus/288/Hub/ChargeVoltage still gets overwritten to 0 after few moments
@dognose pleeeaaase tell me which document!!
in the ESS manual they say
but this does not work!
no reason why to set 0.0 Volts ChargeVoltag!?!
BMS:
DVCC:
I think this is simply a software bug. I will mail to Victron…
Set ESS to any other mode. See if it works. If it does, then you are just missing something in the manual control loop you need to implement with Mode 3.
I’m tired of trying and trying and trying. Each morning I tell myself “ok, today something productive” and in the late eveing I find myself having done nothing but unsuccessfully tried getting this bloody thing running.
I set to ‘keep battery charged’ and ChargeVoltage gets set to 55.6 Volts (don’t ask me where this value comes from - I set 55.2 Volts in VEConfigure and DVCC Maximum charge voltage is set to 55.2V, too) and the MPII draws from the grid all it can (2.4kW) although setpoint is 50W…
Ok, what should I do now? What other setting to be set? I started several threads and asked several people in different communities, nobody can tell or even guess. You not, too.
The statement in the manual is clear and it clearly does not work as described.
Today is day #6 (I should have written a diary) and I’m not willing to get crazy on this in an endless loop of desperation.
Today I will use to get the MK3 code into my control system, connect the MPII directly to my system and control it directly. No side effects, no despair (hopefully), just gain power from MPII. No colorful animated monitoring of failing in the Remote Console, but doing what it shoud and where I bought it for. With the laptop it worked, I’m quite confident it will work from Pi also.
let’s see what Victron will respond if they will respond…
Values in VEConfigure have no impact when using a BMS. Only way to limit the ChargeVoltage then is to override the BMS’ reported limit by using DVCC.
Because you requested it to do so, by saying “keep batteries charged”. Then it will attempt to keep your batteries charged, which includes charging from the grid.
(I would recommend to use optimized mode, then it will only charge when feed in is detected)
Sorry about your disappointment, but your expectation is also kinda strange. You are setting the system into External control mode (3), but then wondering when it doesn’t do stuff automatic.
what is the setpoint for then? but I don’t care. I’m not willing to get familiar with a mode which I will never use…
how should it detect? only AC-in is connected, nothing else. The thing can not clairvoyance. It should NOT charge from the grid at all!
It should NOT do anything automatically! I want to control the power output, I want to control the charge voltage. But the latter it wouldn’t allow me and does not even do as it is described.
as I mentioned - the system is running quite perfect, I only require more inverter power, splitting my setpoint on two devices. Nothing else!
If you don’t want to charge from grid ever- use ve config and switch off the internal charger.
If the bms control is the issue, then disable its control over the system in DVCC. That way battery information is still available and reported, it just does not control anything.
A word of caution, the voltages set on the inverter for charging then dictate the system charge voltages (even the mppts if they are set differently)
this is how I started. ChargeVoltage of solar chargers got set to zero. Then I was pointed to the manual “In ESS, the MPPT Solar Chargers will follow the charge curve as set in VEConfigure.” so I activated the curve. ChargeVoltage of solar chargers gets set to zero…
wasn’t it you who told that in mode 3 the input/output direction gets determined by the sign of the setpoint? and due to this charging/discharging (what else should happen to the energy)…
nothing works as expected or described.
ok, that’s not true. at least feeding and drawing energy works 
in fact only the taking over the control of the charge voltage is the only thing that destroys everything. during the night it works ok, but the battery will never get charged again during daytime…
You are mixing two things:
Charging performed by the multiplus and charging performed by the mppts.
They have things in common, like a common charge voltage limit - but beside that, they are 2 completly different things. You can use both or only one of them.
ok. one by one:
- only AC-in and DC connected on the MPII.
- negative setpoint → energy taken from the battery, sourced into the grid.
- positive setpoint → energy taken from the grid. what else should it do than charging it into the battery?
the MP2 can not eat up energy or gain it from nothing.
exactly! coupled by the dc link (battery). this is how my complete control is designed. why does an inverter want to command MPPT chargers??
It should do nothing else than inverting. As the Lumentree does and as the MPII does when not connected to Venus
oh, hi Alexandra @lxonline !
sorry somehow I missed your contribution. Thank you for getting in!
So slowly again, please - what should/can I do to make the MPII simply acting as an inverter and doing nothing else to the system?