As expected looking at the wind forecast zero prices until 17:00 tomorrow.
Decreased charging power to gain inverter efficiency.
Dess doesnât work on âguessingâ. It will charge from the battery, when it can see a consumption need that cannot be covered by solar needs and would cause more expensive purchase otherwise.
And imho that makes sence. Imagine DESS would now fully charge your battery and tomorrow, grid prices would be down to -10 cents? Complaints would be, that the system irratically fully charged the battery âtoo earlyâ and now a great opportunity was missed 
So, waiting until the forecasts show an actual NEED to purchase energy is in the sence of Green Mode, it minimizes grid utilization to only âwhatâs needed or monetary beneficialâ.
Maybe you could predict energy price 1-2 days before based on wind and sun weather forecast.
If this added is >20GW in the day (in weekend even lower), the price is near zero.
I think the scheduling team already played around with forecasted prices - but results were not very satisfying for DESS operation.
It leads to making decissions based on 3 forecasts (solar, consumption AND prices) compared to just 2 forecasts, when prices are known.
And it would significantly impact transparency, as decissions of âtodayâ would be impacted by volatile assumptions on what happens in 2 or 3 days. By the time a user looks at it, situation may have changed and all that would be left is a big question mark on âwhy did it charge 8 kWh this morning?â
Agree, this would give a lot of questions!
Maybe you could make minimum SOC âvariableâ on the next 2-3 days predictions (extra option).
This to make a slow anticipation on the expected weather situation.
I can understand that you need also the price info of the next day to made the decision to charge the battery or not. So I waited until the new prices were availble around 14.00 h And again the price is around zero cent until 18.00 hour. After 18.00h the price increased. So from this moment the known lowest price is zero cent. However DESS started not charging the batteries. Also not my storing my solarenergy into the batteries. And why not?
So I decided (around 14.30 h) to set manually the minimum SOC from 20% to 90% to load the batteries. And then it started loading the batteries from the grid and also storing my solar energy into the batteries. But this manual intervention is not what I like.
By the way I am using the trade mode (and 6 Multiplus 2 in 3 phase configuration and 90 kWh batteries)
I am in serious disagreement with the core of your argumentation consistently being/signalling that DESS is (to be considered as) a finished product and that therefore every attempt to discuss structural shortcomings and prospective improvements are based on a lack of understanding on the side of the customer/operator.
Trade mode also only âbuysâ, if It can see a sell-opportunity that would cancel out conversion losses and battery cycle costs.
That could be somewhat caused by the following logic: âI can buy all day long for 0 [or less than I get for feedin], why would I send energy through the battery and accept conversion-losses plus battery cycle-costs for feedin-prices in the next 24 hours that are not worth it?â
But to really figure out, what might have been the driving decissions, I would need to look at the whole schedule for these days - and even then I can only throw in a educated guess on what may cause the observed behaviour, Iâm not part of the scheduling team, just learned how the scheduler tends to schedule stuff.
I have installed a Victron MultiPlus-II 48/10000 in three phased with 192kWh of EVE cells.
ACout coupled two Fronius Symo 5kW (where already installed and now additional a Symo 15kW.
The batteries where charged the day (price mfrom 08:00-17:00 mostly under 5¢) from solar without any problems to 100% and the rest went to the GRID.
Selling back was mostly done between 18:00 and 08:00 where EVEN in the summer prices where above 15¢ but sometimes went up to 63¢.
If it continues like that, the WHOLE system is payed off in less then 4 years with an existing GRID connection.
Since my own system is only 230V (three MultiPlus-Ii 24/5000 I could only feed-in 4,6kW, but I consider installing three MultiPlus-II 48/5000 with 128Ah EVE cells a Symo 15kW (21,6kWp solar panels) and couple my 24V system (ACin) to the 48V one via ACout as backup.
The only thing whichvheld me off, arr the orice for the GRID connection which is 404âŹ/A (Elektrilevi, Estonia), hence I neef to pay 8080⏠for 20A.
I run statistics for 4 years now and selling back at night (only overproduction at daytime) is 100% rentable.