I actually managed to turn it on on the 3rd November and ran it for the 4th November. The batteries were about 40% charged going into 4th November. The cheapest energy period was during approx 00:00 - 05:00 but because there was 40% of battery charge during that time, DSS decided to drain the batteries down instead of charging them. Meaning I was drawing from the grid during the expensive hours. Does that sound correct? Does it need to be on for a day or so to adjust?
What do you think about the next behaviour that itâs planning for the next monday?
The weekend is all the weekend with low fare , But when we reach monday, I have low price during de night and itâs planning to use battery, we have some planned solar but not enough, and it still plan to use in the night (Yellow color in the image) with not enough kwh for the 18:00 to 22:00 what is the high price always.
And you can even see that itâs planning to use battery when it knows that is not enough battery (Red colour in the image) by the wayâŚ
I have the same problem with the battery cycle cost. I canât enter a value higher than 0.1 CZK â the field wonât accept anything larger. My site currency is set to CZK.
Hi, there is possibility to submit price over 0.1CZK. Ther is only red note that the price is high, but you can submit price over 0.1CZK withou problem. See my setting.
And note @Victron : there is probably just one limit number for notification message - 0.1. This can be fine value for EUR or USD, but not for CZK, neither for Iranian Rijal
Value for warning should be calculated based on currency.
I cannot change from Green to Trade or vice versa in VRM. It allows me to change, it allows me to save but if I reopen the page, itâs back to the old configuration. I can change it by using Node-Red but not via the regular settings menu in VRM.
I would love to see a DESS setting for âminimum sell priceâ for exporting from the battery. I love trade mode, and would love to keep it on for 100% of the time, but sometimes it loses the plot and starts pushing energy from the battery on days when the spot price is bellow 5 cents/kWh. Especially if the battery is full and current day and the next day prices vary only from 0 to 6 cent range for spot prices. I would love to set a floor of 10 cents(user selectable) per kWh, that Trade mode will never use the battery for exporting(Solar exporting even bellow this would not be effected, since I donât have to pay the purchase transmission costs of 7 cents for the grid operator). That would solve all my issues with using Trade mode 24/7/365.
When price volatility is high, the Trade mode is PERFECT. On average it provides me with negative monthly energy bills, but I have to supervise it every day when the prices are low for a long time. And sometimes disable Trade mode if it starts to export from battery bellow brake even prices. Round trip losses on top of that.
If bellow 10 cents was an floor option I would much rather just let the battery sit at 98% and keep it in reserve for outages or better opportunities for selling with high prices. And use for self consumption if the price delta is higher than conversion losses. But not exporting for no good reason.
Also lately after firmware updates it seems that the DESS Trade mode has been quite unwilling to fully charge the battery even at sub 1 cent per kWh prices from the grid if large volatility is not in the horizon for the next day on spot prices.
If my battery(60kWh) is empty, winter is coming and solar forecast if very low, I would like it to always charge up the battery if the price is bellow 2 cents per kWh on spot. Especially when close to 0 spot price. Now it just seems to wait until it has confirmation, that it can sell it with profit. Keeping the battery very low SOC.
These 2 spot price limits/triggers would make this absolutely perfect for residential house DESS automation.
So sorry for this. It was indeed a Node-Red flow causing this. Funny thing is, I created the flow because I was unable to set it and not the other way around. Thatâs a couple of months ago and I never took the time to submit the issue. Apparently it is somehow fixed so I can remove the flow.
Same thing for the charge and discharge power. I have not been able to edit them for a long time and have used a simple flow to change values now that winter is coming and MPPT PV is not contributing as much to charge power. Again, fixed as well.
So thanks for fixing and again sorry for the mixup with Node-Red.
Another direct example today on Trade mode. Why is it trying to empty the battery mid day with 2 cent/kWh sell price while it knows how much it cost to recharge the battery during the night before?
I stopped it by raising the minimum SOC to 91% from 30%, but the schedule indicated that it wanted to discharge the battery to minimum SOC for hours.
Why does this happen when prices are so low that there is no logical reason to export by selling?