It will be hard turn off of solar, as in those hours charging the battery from grid is economically more profitable.
Note that you will be able to set the threshold, so for some this will be at -1 cent but for others -10 cents.
Awesome! please consider that some systems are not able to be integrated with victron, but for example i turn my enphase solar off with another system. Please please please add an option that DESS just considers solar production to be 0 kwh if the prices are below 0
I had a similar issue where SolarEdge shuts off the Solar production and DESS is not charging energy with negative prices from the grid.
Is there a list that shows which PV inverters (brand / type) are supported. Those should use the modbus / sunspec.
I am mainly curious for GroWatt inverters.
I see a interesting github for this type inverters:
Hi Barbara,
I would like to see the option to have solar turned of during negative BUY prices (not sell prices)
during negative sell prices I can put solar to my battery, and DESS will limit my solar inverters already (Via modbus) so that’s covered, however I noticed it’s not turning of solar during negative BUY prices, where I would earn money by importing from the grid. (in Belgium there is around a 15cent difference between buy and sell, so negative buy prices are a bit more rare than negative sell)
Hi,
You are right, that was my mistake: this is indeed for buy. However, also for sell once your battery is full and there are no loads to use solar for.
What would be the difference with the current behaviour for negative sell prices ?
When sell prices are negative and there is no load to put solar to DESS is already curtailing my 2 SMA inverters and victron solar charger ? (Even though the sma page on the documentation claims this doesn’t work) this is happening correctly to 10W precision keeping grid at almost exactly 0
Hi, is there an update on the ETA of this fuctionality? Currently the managing of my solaredge by victron doesn’t allow me to use home automation to shut down the inverter because victron overwrites it within seconds. I would love this feature not to have to do it manually anymore.
Hi Mathijs,
Yes, this functionality is now in an internal test version of the GX software. I expect it to go to public beta this month.
Hi Barbara. Any update regarding this feature? Thanks!
Hey there, sorry for the long wait. I was on a summer holiday, but the feature will make its way to beta this week.
Hello Barbara, have there been any developments in this area yet?
Hi @ArjanH ,
This is actually on BETA!
Note that it only works with inverters controllable by the GX 
I am curious to hear what you think of it!
So this is not a smart function?
e.g: I have an EV that will be charged during the day, which is seen in the forecast in VRM, and there are 2 hours of negative prices. but when charging the battery and charging the car, the limit of the grid is being used: 17kW, while there is solar available.
The solar production is not being used at these 2 hours of negative energyprices?
For the next hours, the energyprices need to be paid for, while there was free solar power available…
But the system went for grid energy for which you got paid to use it, that is the target of the feature.
I think it should be controlled based on if you exceed your grid connection, because you cannot go over your 25A fuses to get more energy from the grid.
You want to use as much free energy as there is available, I don’t think this is a big task?
In my oppinion this target on/off is just a silly thing, as this is just not smart?
If you exceed your Maximum import power, your solar should be controlled so that it still takes as much grid power: 17kW in your picture, but if your grid connection anything like this value, solar should jump in, controlled by the maximum import power…
can you takes this in mind for future development? I don’t think it is much work, but you should take this in consideration?
Still thanks, but I will not use this future because of my situation, I will make a smart function in node red as explained.
George
If you exceed your import power and have your inverters configured accordingly they will Peak-Shave what is missing.
That then may temporary happen from battery (not even sure on that), but if grid prices are negative, DESS for sure also sends a charge-schedule during that time to maximize gain from these negative prices. So any temporary battery need will result in “more gain” from grid after the peak.
You shouldn’t worry all too much about a theoretical issue there: Hours with negative prices during noon will have plenty of solar after the negative hours to recharge what the battery eventually needed on that and wasn’t able to recharge for real negative prices after consumption peaks.
You want to use as much free energy as there is available
No, in the case of negative grid prices, we don’t want 0 cent energy. We want -40 cent energy to be used 
(But It is not mandatory to enable that feature at all, If you still prefer to use “greener home energy” even during negative prices)
Is there a list of which inverters are compatible with this function? Does the SMA Sunny Tripower also reduce its output?
Kind regards