question

carsten-pedersen avatar image
carsten-pedersen asked

Dynamic ESS inconsistent target SOC and start charging in sell period

Been having issues with dynamic ess, where it will start charging at inopportune times.

So today it made a plan to start selling power from the battery at 6:00, and continue doing so till until 9:00. This seems like a good plan, when manually looking at it, and stuck with this plan in the web interface after the following event.

6:00 comes around, and it's starts selling. It sets a target soc of 49% but changes it's mind 8min later, and sets it to 52%. Then 7:00 comes around, and target soc gets set at 23%, this lasts 8min again, then a new target soc gets set, at 53% and again 15 mins later, to 54%. The 23% target soc results in dumping power on the grid, discharging the battery to 49%. The change to 53% target soc then results in buying back that power at a higher price.

Is there something I should look into in my setup to prevent this, or am i stuck with dynamic ess's schizophrenic target soc going a bit random?

battery chargingdynamic essess dischargingDESSdischaring
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Eric Wilke avatar image Eric Wilke commented ·

malfunctioning DESS, read the list, there is a problem

https://community.victronenergy.com/questions/321621/malfunctioning-dess.html

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1 Answer
ton-gans avatar image
ton-gans answered ·

See the topic about "malfunction DESS"

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