question

i use a nodered flow to set the gridsetpoint deeper in the morning, when the sunforecast in the afternoon will be high.

so battery will stay on a lower SOC till the late afternoon.

i found no other easy way to feed in earlyer.

Could you please share your flow ?

the result is at 12:00 in summer time my battery is fully charged but my solar production is capped to the power output of my inverters (15kWp instead of 25kWp)

Maybe I did not understood correctly, but you can't output/export to the grid at higher power than the inverters are capable. You are exporting AC power, not DC power.

i hope it is usefull for you, because i noted everything in "german".

also the weatherforecast_node is from german dwd, with only local stations.

but perhaps you can use it to make your one easy.

also have a look in the node_red space:

https://community.victronenergy.com/articles/172211/node-red-fetch-forecasted-solar-yield.html?smartspace=node-red

my flow: (zipped it to upload - could not insert it directly. is there a better way to share?)

Gridsetpoint_nach_sonnenvorschau_regeln.zip

edit:

the function-node "abhängig Netzregelpunkt setzen" ( set gridsetpoint dependent from solar-power/sun forecast/SOC)

here the effect:

before i used the flow, battery was full around 12:00.

now it is full in the late afternoon, dependent on my adjustments. i am finetuning these days.

Thanks, i will look at it tomorrow
(google translation german to french will be helpfull ^^)

Your flow is really interesting, thanks again, i'm trying to adapt it to my needs but i have another "problem", i have a Fronius (managed by ESS) and another inverter (not managed) that seems to interfer with the calculation of grid outputn if i use Grid Setpoint, they are connected to AC-IN, i don't use AC-OUT.

The problem is that i didn't know how to tell to the 3x multiplus to invert at max power, i can only set Grid Set Point, and ...

if is set it to 35kW no problem, everything is exported to the grid, but if i want to finetune the grid export from the multiplus i cannot set a real value that is not related to the wattmeter monitoring grid output .. not sure if i explain well ...

I want to configure the Watts output of the multiplus ac-in directly, not using grid setpoint .. do you have an idea ?

EDIT : exemple, now it's night time, i set Grid Setpoint to 10kW but i have a load on AC-IN of 8kW, the ESS provide power to loads but is trying to achieve 10kW to the grid ...
I want to tell the multiplus to "produce" 10kW for ac-in instead of trying to export 10kW to the grid.

The other thing you can do is control the limit battery charge voltage in the DVCC setting. This will mean that AC loads are serviced as normal. You are limiting the charge rate to the battery causing excess to be fed to the grid. I can' remember the numbers off the top of my head but say the battery is at 48v then limiting to 48.2v might only allow a charge rate of 1kW for example. 48.4 would be 2kW.

Work out what charge rate you want on the battery. Then monitor the battery charge rate each cycle. If it is too high then decrement voltage and if too low increment. Just do it a small amount. Its a very simple loop.

Any excess power will just be exported. I do this to force an export which is picked up by my zappie car charger.