I cannot reach ZERO consumption from grid ; Why do I consume 0,1 kWh from grid every 4/5 hours ?
I could switch off the main breaker at grid arrival, but there is certainly a more suitable solution...
I have ESS Mode Optimized (with BatteryLife), Grid setpoint = 20W, and I use 2 ET112 energymeters (one for grid and the other for PV-AC production).
How can I manage the victron ESS to achieve my goal = ZERO consumption ?
If you have a grid set point of 250W it will do that.
Sometimes it is set like that so there is no accidental feedback.
Are you allowed to feedback? Or is there a tolerance for slight or accidental feedback?
But looking at your set up and useage, you could easily switch off the grid and not care. There is also the option of AC ignore until a certain battery level....
What I said was if your grid set point was at 250W that is what you would see. Your picture in your original post shows the draw from grid at 250w. So I concluded 250W over 4 hours is 1 kwh of consumption.....
Under the inverter in device list you can switch the systen to inverter only from the GX. This will stop grid synchronisation (you will hear the relay disconnect). So it will disconnect your system from grid without touching a breaker and you can reconnect (even remotely) whenever you want to.
ESS tests the grid with a bit of push pull every now and then, so there is always an exchange of some kind. As other have said, unavoidable unless you disconnect.
ok I understand ; confusion came because I wrote Grid setpoint = 20W. Thanks for second remark, but how can I "switch the systen to inverter only from the GX" ?
are really CT clamps faster than energymeters ? it will depend on their electronic controller... which ones do you suggest ? But CT clamps are less accurate ?
yes, CT is faster. Its directly connected with instant reaction.
Any Gridmeter instead has several delays in terms of modbus update rate and GX communication to the multis.
downside of CT's is that you have cable length restrictions and VRM does not sum up the energy of all 3 phases correclty like EM24 or EM540 meters would do
As I mentioned in another topic. It looks like victron programmed the sofware in a way that even when the batteries are completely "dead", the victron can still execute all it needs to do, because it will still take power from the grid = is put power the grid.
You won't.. I don't know what your Inverter is but there is always a "zero load" power consumption. The only way is to turn everything off when you know you are not using any power. Very tedious? Probably not good for the system. You just have to take that "very small" power drain as part of the deal?
Unfortunately, the ESS mode use the grid as a buffer and is always exchanging with it some Watts to balance it's power
The result is, yes, a consumption / injection from/to the grid. I guess it depend of the size of the inverter. I have a 10kVA one and I can witness roughly 0,4kWh / day imported and 0,4kWh imported
The only way to hide this is to switch off the grid (and the ESS de facto)
Hello Victron Service engineers, could you please give the Victron answer, because I can tell thank you to all contributors who gave me these different answers to "remove" these low consumptions :
1-switch off the grid every night
2-use Mode Optimized (Without BatteryLife) instead WITH BatteryLife
3-set Grid setpoint = 250W
4-Set Grid setpoint = 0W
5-Set Grid setpoint = -20W
What is the Victron answer ? Thanks in advance
Perhaps a user of the community has solved this issue ?
Perhaps a Victron engineer is listening to the questions of their end users, and is willing to answer to their needs ?
Thanks in advance
Your only solution is to drop the AC In which you can do conditionally via victron connect directly to the inverter, using either voltage, SOC etc as the conditions to automatically disconnect/reconnect grid.
This is the way the system is designed to work.
What you want is just impossible.
Switching bigger loads ON/OFF will always cause some power to come from the grid/go to the grid for a few seconds.
The System need some time to react.
The only thing you can do is to disconnect your system from the grid.
If you just want to prevent consumption from the grid you cat set the grid setpoint to a negative value but with that you will always feedback that amount of energy into the grid.
In worst case you will empty your whole battery into the grid.
I don't think you will get to 0.0000000kWh.
If you switch on a big load (electric kettle, coffee maker, electric stove ...) you will still have some power coming from the grid for a few seconds.
To prevent that you might hat to set it to -1000 or -2000 and that will discharge you battery quickly and you have to buy more energy from the grid.
But to be honest I don't see any reason why you want that...
My goal was to have a "clean sheet" or "zero" grid consumption during 8 monthes per year. In winter with the power of the Heating pump it is impossible, especially due to much less sun. Just to be able to show to my friends the proof from the grid supplier that it is possible to be 100% autonomous during 8 monthes per year with an appropriate installation. I agree with you that a very small amount grid consumption is of course acceptable. Thank you again very much.
With my Cerbo running v2.92 and an EM24 as grid meter, I see approx 0.25kWh per day consumption from grid....with running v3.00b29, I see that cut almost in half, to 0.15kWh/day.
Deploying are newer grid-meter model, like the ET540, should give even better results, as claimed in the release notes from v3.00-beta (see modifications section in the forum).
In my residential ESS system I set the grid set-point to -10W. It pulls around 0.1kWh from the grid each day (24hr).
Maybe this will point you in the right direction: https://community.victronenergy.com/questions/200301/solution-victron-dynamic-energy-pricing.html
